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Torrent F, Villena A, Lee PA, Fuchs W, Bergmann SM, Coll JM. The amino-terminal domain of ORF149 of koi herpesvirus is preferentially targeted by IgM from carp populations surviving infection. Arch Virol 2016; 161:2653-65. [PMID: 27383208 DOI: 10.1007/s00705-016-2934-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 06/13/2016] [Indexed: 12/25/2022]
Abstract
Recombinantly expressed fragments of the protein encoded by ORF149 (pORF149), a structural protein from the common- and koi-carp-infecting cyprinid herpesvirus-3 (CyHV-3) that was previously shown to be antigenic, were used to obtain evidence that its amino-terminal part contains immunodominant epitopes in fish populations that survived the infection. To obtain such evidence, nonspecific binding of carp serum tetrameric IgM had to be overcome by a novel ELISA protocol (rec2-ELISA). Rec2-ELISA involved pre-adsorption of carp sera with a heterologous recombinant fragment before incubation with pORF149 fragments and detection with anti-carp IgM monoclonal antibodies. Only in this way was it possible to distinguish between sera from uninfected and survivor carp populations. Although IgM from survivors recognised pORF149 fragments to a lesser degree than whole virus, specificity was confirmed by correlation of rec2- and CyHV-3-ELISAs, inhibition of rec2-ELISA by an excess of frgIIORF149, ELISA using IgM-capture, Western blotting, and reduction of reactivity in CyHV-3-ELISA by pre-adsorption of sera with frgIIORF149. The similarity of IgM-binding profiles between frgIORF149 (amino acid residues 42-629) and frgIIORF149 (42-159) and their reactivities with previously described anti-CyHV-3 monoclonal antibodies confirmed that most pORF149 epitopes were localised in its amino-terminal part.
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Affiliation(s)
- F Torrent
- Escuela Superior de Ingenieros de Montes, Universidad Politécnica de Madrid (UPM), Piscifactoría, Madrid, Spain
| | - A Villena
- Departamento de Biología Molecular, Universidad de León, Leon, Spain
| | - P A Lee
- Graduate Institute of Biotechnology, Central Taiwan University of Science and Technology, Taichung, Taiwan
- GeneReach Biotechnology, Taichung, Taiwan
| | - W Fuchs
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Südufer 10, 17493, Greifswald-Insel Riems, Germany
| | - S M Bergmann
- Institute of Infectology, German Reference Laboratory for KHVD, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Südufer 10, 17493, Greifswald-Insel Riems, Germany
| | - J M Coll
- Departamento Biotecnología, Instituto Nacional Investigaciones y Tecnologías Agrarias y Alimentarias, INIA, Madrid, Spain.
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Mikucki JA, Lee PA, Ghosh D, Purcell AM, Mitchell AC, Mankoff KD, Fisher AT, Tulaczyk S, Carter S, Siegfried MR, Fricker HA, Hodson T, Coenen J, Powell R, Scherer R, Vick-Majors T, Achberger AA, Christner BC, Tranter M. Subglacial Lake Whillans microbial biogeochemistry: a synthesis of current knowledge. Philos Trans A Math Phys Eng Sci 2016; 374:rsta.2014.0290. [PMID: 26667908 DOI: 10.1098/rsta.2014.0290] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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: 05/08/2023]
Abstract
Liquid water occurs below glaciers and ice sheets globally, enabling the existence of an array of aquatic microbial ecosystems. In Antarctica, large subglacial lakes are present beneath hundreds to thousands of metres of ice, and scientific interest in exploring these environments has escalated over the past decade. After years of planning, the first team of scientists and engineers cleanly accessed and retrieved pristine samples from a West Antarctic subglacial lake ecosystem in January 2013. This paper reviews the findings to date on Subglacial Lake Whillans and presents new supporting data on the carbon and energy metabolism of resident microbes. The analysis of water and sediments from the lake revealed a diverse microbial community composed of bacteria and archaea that are close relatives of species known to use reduced N, S or Fe and CH4 as energy sources. The water chemistry of Subglacial Lake Whillans was dominated by weathering products from silicate minerals with a minor influence from seawater. Contributions to water chemistry from microbial sulfide oxidation and carbonation reactions were supported by genomic data. Collectively, these results provide unequivocal evidence that subglacial environments in this region of West Antarctica host active microbial ecosystems that participate in subglacial biogeochemical cycling.
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Affiliation(s)
- J A Mikucki
- Department of Microbiology, University of Tennessee, Knoxville, TN 37996, USA Department of Biology, Middlebury College, Middlebury, VT 05753, USA
| | - P A Lee
- Hollings Marine Lab, College of Charleston, Charleston, SC 29412, USA
| | - D Ghosh
- Department of Microbiology, University of Tennessee, Knoxville, TN 37996, USA
| | - A M Purcell
- Department of Microbiology, University of Tennessee, Knoxville, TN 37996, USA
| | - A C Mitchell
- Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, UK
| | - K D Mankoff
- Department of Geosciences, The Pennsylvania State University, University Park, PA 16802, USA
| | - A T Fisher
- Earth and Planetary Sciences, University of California, Santa Cruz, CA, USA
| | - S Tulaczyk
- Earth and Planetary Sciences, University of California, Santa Cruz, CA, USA
| | - S Carter
- Institute for Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, CA 92093, USA
| | - M R Siegfried
- Institute for Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, CA 92093, USA
| | - H A Fricker
- Institute for Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, CA 92093, USA
| | - T Hodson
- Department of Geology and Environmental Geosciences Northern, Illinois University, DeKalb, IL 60115, USA
| | - J Coenen
- Department of Geology and Environmental Geosciences Northern, Illinois University, DeKalb, IL 60115, USA
| | - R Powell
- Department of Geology and Environmental Geosciences Northern, Illinois University, DeKalb, IL 60115, USA
| | - R Scherer
- Department of Geology and Environmental Geosciences Northern, Illinois University, DeKalb, IL 60115, USA
| | - T Vick-Majors
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT 59717, USA
| | - A A Achberger
- Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
| | - B C Christner
- Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
| | - M Tranter
- Bristol Glaciology Centre, Geographical Sciences, University of Bristol, Bristol BS8 1SS, UK
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Traxler RM, Guerra MA, Morrow MG, Haupt T, Morrison J, Saah JR, Smith CG, Williams C, Fleischauer AT, Lee PA, Stanek D, Trevino-Garrison I, Franklin P, Oakes P, Hand S, Shadomy SV, Blaney DD, Lehman MW, Benoit TJ, Stoddard RA, Tiller RV, De BK, Bower W, Smith TL. Review of brucellosis cases from laboratory exposures in the United States in 2008 to 2011 and improved strategies for disease prevention. J Clin Microbiol 2013; 51:3132-6. [PMID: 23824776 PMCID: PMC3754678 DOI: 10.1128/jcm.00813-13] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [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: 03/26/2013] [Accepted: 06/18/2013] [Indexed: 01/18/2023] Open
Abstract
Five laboratory-acquired brucellosis (LAB) cases that occurred in the United States between 2008 and 2011 are presented. The Centers for Disease Control and Prevention (CDC) reviewed the recommendations published in 2008 and the published literature to identify strategies to further prevent LAB. The improved prevention strategies are described.
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Affiliation(s)
- R. M. Traxler
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - M. A. Guerra
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - M. G. Morrow
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - T. Haupt
- Wisconsin Department of Health Services, Madison, Wisconsin, USA
| | - J. Morrison
- University of Wisconsin—Madison Environment, Health and Safety, Madison, Wisconsin, USA
| | - J. R. Saah
- North Carolina Department of Health and Human Services, Raleigh, North Carolina, USA
| | - C. G. Smith
- North Carolina Department of Health and Human Services, Raleigh, North Carolina, USA
| | - C. Williams
- North Carolina Department of Health and Human Services, Raleigh, North Carolina, USA
| | - A. T. Fleischauer
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
- North Carolina Department of Health and Human Services, Raleigh, North Carolina, USA
| | - P. A. Lee
- Bureau of Public Health Laboratories, Florida Department of Health, Jacksonville, Florida, USA
| | - D. Stanek
- Bureau of Epidemiology, Florida Department of Health, Tallahassee, Florida, USA
| | | | - P. Franklin
- Missouri Department of Health and Senior Services, Jefferson City, Missouri, USA
| | - P. Oakes
- Mississippi State Department of Health, Jackson, Mississippi, USA
| | - S. Hand
- Mississippi State Department of Health, Jackson, Mississippi, USA
| | - S. V. Shadomy
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - D. D. Blaney
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - M. W. Lehman
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
- Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - T. J. Benoit
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - R. A. Stoddard
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - R. V. Tiller
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - B. K. De
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - W. Bower
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - T. L. Smith
- Bacterial Special Pathogens Branch, Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
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Zhang Z, Addo OY, Himes JH, Hediger ML, Albert PS, Gollenberg AL, Lee PA, Louis GMB. A two-part model for reference curve estimation subject to a limit of detection. Stat Med 2011; 30:1455-65. [PMID: 21264894 DOI: 10.1002/sim.4189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2010] [Accepted: 12/09/2010] [Indexed: 11/12/2022]
Abstract
Reference curves are commonly used to identify individuals with extreme values of clinically relevant variables or stages of progression which depend naturally on age or maturation. Estimation of reference curves can be complicated by a technical limit of detection (LOD) that censors the measurement from the left, as is the case in our study of reproductive hormone levels in boys around the time of the onset of puberty. We discuss issues with common approaches to the LOD problem in the context of our pubertal hormone study, and propose a two-part model that addresses these issues. One part of the proposed model specifies the probability of a measurement exceeding the LOD as a function of age. The other part of the model specifies the conditional distribution of a measurement given that it exceeds the LOD, again as a function of age. Information from the two parts can be combined to estimate the identifiable portion (i.e. above the LOD) of a reference curve and to calculate the relative standing of a given measurement above the LOD. Unlike some common approaches to LOD problems, the two-part model is free of untestable assumptions involving unobservable quantities, flexible for modeling the observable data, and easy to implement with existing software. The method is illustrated with hormone data from the Third National Health and Nutrition Examination Survey.
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Affiliation(s)
- Z Zhang
- Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD 20892-7510, USA.
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Mavroeidi A, O'Neill F, Lee PA, Darling AL, Fraser WD, Berry JL, Lee WT, Reid DM, Lanham-New SA, Macdonald HM. Seasonal 25-hydroxyvitamin D changes in British postmenopausal women at 57 degrees N and 51 degrees N: a longitudinal study. J Steroid Biochem Mol Biol 2010; 121:459-61. [PMID: 20302933 DOI: 10.1016/j.jsbmb.2010.03.038] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Revised: 02/24/2010] [Accepted: 03/08/2010] [Indexed: 11/30/2022]
Abstract
The UK has insufficient intensity of sunlight at wavelengths 290-315 nm to enable cutaneous synthesis of vitamin D from October to April. There are regional differences in UVB strength throughout the UK but whether this translates to differences in vitamin D status is not known. We have reported seasonal variations in a cross-sectional study of over 3000 Scottish women in Aberdeen. The aim of this longitudinal study was to compare the seasonal variation of serum 25-hydroxyvitamin D [25(OH)D] in postmenopausal women residing in Aberdeen (57 degrees N) and Surrey (51 degrees N). Women attended 3-monthly visits over 12 months, starting summer 2006. In Aberdeen, 338 Caucasian women (mean age+/-SD, 61.7+/-1.5 years); and at Surrey, 138 Caucasian women (61.4+/-4.5 years) and 35 Asian women (59.9+/-6.4 years) had serum 25(OH)D measured by IDS enzyme immunoassay. In winter/spring none of the Caucasian women living in Surrey had 25(OH)D<20 nmol/L, but nearly a quarter of women in Aberdeen were vitamin D-deficient. This number decreased to 4.2% in summer/autumn. For the Asian women 17.1% were vitamin D-deficient in summer, increasing to 58.1% in winter. Using higher 25(OH)D deficiency cut-offs, the percentage of women affected was much higher. These longitudinal data show clear differences in vitamin D status between the north and south of the UK, and marked ethnic differences. They are consistent with our previous data and with cross-sectional data from the 1958 birth cohort. The low vitamin D status may have implications for bone health and other health outcomes, which is currently being investigated in this publication group. The extent of vitamin D deficiency in Asian women residing in the South of England is of concern.
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Affiliation(s)
- A Mavroeidi
- Bone and Musculoskeletal Research Programme, University of Aberdeen, UK.
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7
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Mikucki JA, Pearson A, Johnston DT, Turchyn AV, Farquhar J, Schrag DP, Anbar AD, Priscu JC, Lee PA. A Contemporary Microbially Maintained Subglacial Ferrous "Ocean". Science 2009; 324:397-400. [DOI: 10.1126/science.1167350] [Citation(s) in RCA: 200] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Lee PA, Anderson D, Avrutskaya A, White A, Pheneger T, Winkler JD. In vivo activity of ARRY-543, a potent, small molecule inhibitor of EGFR/ErbB-2 in combination with trastuzumab or docetaxel. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-2150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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
Abstract #2150
ARRY-543 is an orally active, potent small molecule tyrosine kinase inhibitor targeting both EGFR and ErbB2. The compound is a reversible, ATP-competitive inhibitor with nanomolar potency in both in vitro and in cell-based assays showing strong activity against EGFR, HER-2 and ErbB-4. This compound has very good in vivo and in vitro PK/ADME properties and has shown excellent activity in numerous mouse tumor models including epidermoid (A431), breast (BT-474, MDA-MB-453), non-small cell lung (H1650, A549, 292), colorectal (Lovo, HT-29) and gastric (N87) carcinoma models. Here we demonstrate excellent single agent activity and combinability with trastuzumab or docetaxel in breast, gastric and ovarian carcinoma models. For the BT-474 studies, female SCID beige mice were implanted with tumor fragments. For the SKOV-3 and N87 tumor studies, female nude mice were inoculated with cells subcutaneously in the flank. Animals received: doses of ARRY-334543 ranging up to 200 mg/kg/d, PO; and/or trastuzumab at 20 mg/kg, IP, Q3D or QW; and/or docetaxel at 10 mg/kg, IV, Q3D. Tumor size was measured at regular intervals for up to 21 days. In the BT-474 model, ARRY-334543 demonstrated significant dose-related tumor growth inhibition (69% at 100 mg/kg/d and 98% at 200 mg/kg/d with significant regressions (>50% reduction from baseline size) at both dose levels (3/12 in the 100 mg/kg/d group and 10/10 in the 200 mg/kg/day group). Trastuzumab alone provided a 53% TGI with a regression (1/12 animals). ARRY-543 (100 mg/kg/d) in combination with trastuzumab showed a 99% TGI with significant, regressions in 11/11 animals with 8CRs. Docetaxel as a single agent produced a 67% TGI with no regressions. In combination with ARRY-543 (100 mg/kg/d) there was an 88% TGI and significant regressions in 8/12 animals. In the SKOV-3 carcinoma tumor line (high ErbB2/medium EGFR expression), ARRY-334543 demonstrated significant dose related tumor growth inhibition (up to 90%) producing significant regressions in 6/8 animals. Trastuzumab alone produced a 71% TGI with significant regressions in 2/9 animals. ARRY-543 (100 mg/kg/d) in combination with trastuzumab yielded a 89% TGI with significant regressions in 8/9 animals. In the ErbB2-over-expressing gastric carcinoma tumor line N87, ARRY-334543 (100 mg/kg/d) demonstrated significant dose-related tumor growth inhibition (up to 74%) with 7/8 significant regressions. Trastuzumab alone provided a 52% TGI with no regressions. ARRY-543 (100 mg/kg/d) in combination with trastuzumab showed a 91% TGI with significant regressions in 7/8 animals. We have demonstrated excellent single agent activity for ARRY-543 in the SKOV-3 ovarian carcinoma xenograft model as well as additive activity to trastuzumab in SKOV-3, BT-474 and N87 models. In the BT-474 model, ARRY-543 showed excellent additive activity to, and tolerability with, docetaxel. ARRY-543 is in several Phase II clinical trials in patients with advanced cancers.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 2150.
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Affiliation(s)
- PA Lee
- 1 Pharmacology/Toxicology, Array BioPharma Inc, Boulder, CO
| | - D Anderson
- 1 Pharmacology/Toxicology, Array BioPharma Inc, Boulder, CO
| | | | - A White
- 2 Piedmont Research Center LLC, Morrisville, NC
| | - T Pheneger
- 1 Pharmacology/Toxicology, Array BioPharma Inc, Boulder, CO
| | - JD Winkler
- 1 Pharmacology/Toxicology, Array BioPharma Inc, Boulder, CO
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Balicas L, Jo YJ, Shu GJ, Chou FC, Lee PA. Local moment, itinerancy, and deviation from Fermi-liquid behavior in NaxCoO2 for 0.71< or = x < or =0.84. Phys Rev Lett 2008; 100:126405. [PMID: 18517893 DOI: 10.1103/physrevlett.100.126405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2007] [Indexed: 05/26/2023]
Abstract
Here we report the observation of Fermi surface (FS) pockets via the Shubnikov-de Haas effect in NaxCoO2 for x=0.71 and 0.84, respectively. Our observations indicate that the FS expected for each compound intersects their corresponding Brillouin zones, as defined by the previously reported superlattice structures, leading to small reconstructed FS pockets, but only if a precise number of holes per unit cell is localized. For 0.71< or = x < 0.75 the coexistence of itinerant carriers and localized S=1/2 spins on a paramagnetic triangular superlattice leads at low temperatures to the observation of a deviation from standard Fermi-liquid behavior in the electrical transport and heat capacity properties, suggesting the formation of some kind of quantum spin-liquid ground state.
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Affiliation(s)
- L Balicas
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA
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Chau LK, Chen SY, Armstrong NR, Collins GE, England CD, Williams VS, Anderson ML, Schuerlein TJ, Lee PA, Nebesny KW, Parkinson B, Arbour C. Organic/Inorganic Molecular Beam Epitaxy (O/I-MBE): Formation and Characterization of Ordered Phthalocyanine Thin Films – Photoelectrochemical Processes. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259408038212] [Citation(s) in RCA: 5] [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] [Indexed: 10/23/2022]
Affiliation(s)
- L.-K. Chau
- a Department of Chemistry , University of Arizona , Tucson , Arizona , 85721
| | - S.-Y. Chen
- a Department of Chemistry , University of Arizona , Tucson , Arizona , 85721
| | - N. R. Armstrong
- a Department of Chemistry , University of Arizona , Tucson , Arizona , 85721
| | - G. E. Collins
- a Department of Chemistry , University of Arizona , Tucson , Arizona , 85721
| | - C. D. England
- a Department of Chemistry , University of Arizona , Tucson , Arizona , 85721
| | - V. S. Williams
- a Department of Chemistry , University of Arizona , Tucson , Arizona , 85721
| | - M. L. Anderson
- a Department of Chemistry , University of Arizona , Tucson , Arizona , 85721
| | - T. J. Schuerlein
- a Department of Chemistry , University of Arizona , Tucson , Arizona , 85721
| | - P. A. Lee
- a Department of Chemistry , University of Arizona , Tucson , Arizona , 85721
| | - K. W. Nebesny
- a Department of Chemistry , University of Arizona , Tucson , Arizona , 85721
| | - B.A. Parkinson
- b Department of Chemistry , Colorado State University , Fort Collins , Colorado , 80523
| | - C. Arbour
- c Research Center for Photobiophysics, University of Quebec , Trois-Rivier , Canada
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Balicas L, Analytis JG, Jo YJ, Storr K, Zandbergen H, Xin Y, Hussey NE, Chou FC, Lee PA. Shubnikov-de Haas effect in the metallic state of Na0.3CoO2. Phys Rev Lett 2006; 97:126401. [PMID: 17025986 DOI: 10.1103/physrevlett.97.126401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2006] [Indexed: 05/12/2023]
Abstract
Shubnikov-de Haas oscillations for two well-defined frequencies, corresponding, respectively, to areas of 0.8 and 1.36% of the first Brillouin zone, were observed in single crystals of Na(0.3)CoO2. The existence of Na superstructures in Na0.3CoO2, coupled with this observation, suggests the possibility that the periods are due to the reconstruction of the large Fermi surface around the Gamma point. An alternative interpretation in terms of the long sought-after epsilon'(g) pockets is also considered but found to be incompatible with existing specific heat data.
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Affiliation(s)
- L Balicas
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32306, USA
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Abstract
Management of intersex disorders
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Affiliation(s)
- I A Hughes
- Department of Paediatrics, University of Cambridge, Addenbrooke's Hospital, Box 116, Level 8, Hills Road, Cambridge CB2 2QQ, UK.
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Abstract
The birth of an intersex child prompts a long-term management strategy that involves a myriad of professionals working with the family. There has been progress in diagnosis, surgical techniques, understanding psychosocial issues and in recognizing and accepting the place of patient advocacy. The Lawson Wilkins Paediatric Endocrine Society (LWPES) and the European Society for Paediatric Endocrinology (ESPE) considered it timely to review the management of intersex disorders from a broad perspective, to review data on longer term outcome and to formulate proposals for future studies. The methodology comprised establishing a number of working groups whose membership was drawn from 50 international experts in the field. The groups prepared prior written responses to a defined set of questions resulting from an evidence based review of the literature. At a subsequent gathering of participants, a framework for a consensus document was agreed. This paper constitutes its final form.
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Affiliation(s)
- I A Hughes
- Department of Paediatrics, University of Cambridge, Addenbrooke's Hospital, Cambridge CB2 2QQ, UK.
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Balicas L, Abdel-Jawad M, Hussey NE, Chou FC, Lee PA. Shubnikov-de Haas oscillations and the magnetic-field-induced suppression of the charge ordered state in Na(0.5)CoO2. Phys Rev Lett 2005; 94:236402. [PMID: 16090488 DOI: 10.1103/physrevlett.94.236402] [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] [Subscribe] [Scholar Register] [Received: 10/15/2004] [Indexed: 05/03/2023]
Abstract
We have performed electrical transport measurements at low temperatures and high magnetic fields in Na(0.5)CoO2 single crystals. Shubnikov-de Haas oscillations corresponding to only 1% of the area of the orthorhombic Brillouin zone were clearly observed, indicating that most of the original Fermi surface vanishes at the charge-ordering (CO) transition. In-plane magnetic fields were found to suppress strongly the CO state. For fields rotated within the conducting planes, we observe angular magnetoresistance oscillations whose periodicity changes from twofold to sixfold at the transition.
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Affiliation(s)
- L Balicas
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA
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Doyle MP, Yeh TC, Suzy B, Morrow M, Lee PA, Hughes AM, Cartlidge S, Wallace E, Lyssikatos J, Eckhardt SG, Winkler JD. Validation and use of a biomarker for clinical development of the MEK1/2 inhibitor ARRY-142886 (AZD6244). J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.3075] [Citation(s) in RCA: 6] [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] [Indexed: 11/20/2022] Open
Affiliation(s)
- M. P. Doyle
- Array BioPharma, Boulder, CO; U. Colorado Health Sciences Ctr, Aurora, CO; AstraZeneca, Alderley Park, United Kingdom
| | - T. C. Yeh
- Array BioPharma, Boulder, CO; U. Colorado Health Sciences Ctr, Aurora, CO; AstraZeneca, Alderley Park, United Kingdom
| | - B. Suzy
- Array BioPharma, Boulder, CO; U. Colorado Health Sciences Ctr, Aurora, CO; AstraZeneca, Alderley Park, United Kingdom
| | - M. Morrow
- Array BioPharma, Boulder, CO; U. Colorado Health Sciences Ctr, Aurora, CO; AstraZeneca, Alderley Park, United Kingdom
| | - P. A. Lee
- Array BioPharma, Boulder, CO; U. Colorado Health Sciences Ctr, Aurora, CO; AstraZeneca, Alderley Park, United Kingdom
| | - A. M. Hughes
- Array BioPharma, Boulder, CO; U. Colorado Health Sciences Ctr, Aurora, CO; AstraZeneca, Alderley Park, United Kingdom
| | - S. Cartlidge
- Array BioPharma, Boulder, CO; U. Colorado Health Sciences Ctr, Aurora, CO; AstraZeneca, Alderley Park, United Kingdom
| | - E. Wallace
- Array BioPharma, Boulder, CO; U. Colorado Health Sciences Ctr, Aurora, CO; AstraZeneca, Alderley Park, United Kingdom
| | - J. Lyssikatos
- Array BioPharma, Boulder, CO; U. Colorado Health Sciences Ctr, Aurora, CO; AstraZeneca, Alderley Park, United Kingdom
| | - S. G. Eckhardt
- Array BioPharma, Boulder, CO; U. Colorado Health Sciences Ctr, Aurora, CO; AstraZeneca, Alderley Park, United Kingdom
| | - J. D. Winkler
- Array BioPharma, Boulder, CO; U. Colorado Health Sciences Ctr, Aurora, CO; AstraZeneca, Alderley Park, United Kingdom
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Chou FC, Cho JH, Lee PA, Abel ET, Matan K, Lee YS. Thermodynamic and transport measurements of superconducting Na0.3CoO2.1.3H2O single crystals prepared by electrochemical deintercalation. Phys Rev Lett 2004; 92:157004. [PMID: 15169310 DOI: 10.1103/physrevlett.92.157004] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2003] [Indexed: 05/24/2023]
Abstract
Superconducting single crystal samples of Na0.3CoO2.1.3H(2)O have been produced using an electrochemical technique which dispenses with the usual bromine chemical deintercalation method. In fully hydrated crystals, susceptibility and specific heat measurements confirm that bulk superconductivity has been achieved. The extracted normal state density of states indicates Fermi-liquid behavior with strong mass enhancement and a modest Wilson ratio. Measurements of H(c2) for H parallel c and H parallel ab reveal significant anisotropy, and the extracted value for the coherence length is about 100 A, consistent with an extremely narrow bandwidth.
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Affiliation(s)
- F C Chou
- Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Morrissey DV, Lee PA, Johnson DA, Overly SL, McSwiggen JA, Beigelman L, Mokler VR, Maloney L, Vargeese C, Bowman K, O'Brien JT, Shaffer CS, Conrad A, Schmid P, Morrey JD, Macejak DG, Pavco PA, Blatt LM. Characterization of nuclease-resistant ribozymes directed against hepatitis B virus RNA. J Viral Hepat 2002; 9:411-8. [PMID: 12431202 DOI: 10.1046/j.1365-2893.2002.00383.x] [Citation(s) in RCA: 18] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hepatitis B virus (HBV) is responsible for > 350 million cases of chronic hepatitis B worldwide and 1.2 million deaths each year. To explore the use of ribozymes as a novel therapy for HBV infection, nuclease-resistant ribozymes that target highly conserved regions of HBV RNA were screened in cell culture. These synthetic ribozymes have the potential to cleave all four major HBV RNA transcripts and to block the HBV lifecycle by cleavage of the pregenomic RNA. A number of the screened ribozymes demonstrate activity in cell culture systems, as measured by decreased levels of HBV surface antigen, HBV e antigen and HBV DNA. In addition, a lead anti-HBV ribozyme maintains activity against a lamivudine-resistant HBV variant in cell culture. Treatment of HBV transgenic mice with lead anti-HBV ribozymes significantly reduced viraemia compared with saline-treated animals and was as effective as treatment with lamivudine. In conclusion, the therapeutic use of a ribozyme alone or in combination with current therapies (lamivudine or interferons) may lead to improved HBV therapy.
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Affiliation(s)
- D V Morrissey
- Ribozyme Pharmaceuticals, Inc, Boulder, CO 80301, USA.
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Chau LK, Arbour C, Collins GE, Nebesny KW, Lee PA, England CD, Armstrong NR, Parkinson BA. Phthalocyanine aggregates on metal dichalcogenide surfaces: dye sensitization on tin disulfide semiconductor electrodes by ordered and disordered chloroindium phthalocyanine thin films. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100113a034] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Teo BK, Lee PA. Ab initio calculations of amplitude and phase functions for extended x-ray absorption fine structure spectroscopy. J Am Chem Soc 2002. [DOI: 10.1021/ja00505a003] [Citation(s) in RCA: 1120] [Impact Index Per Article: 50.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Teo BK, Lee PA, Simons AL, Eisenberger P, Kincaid BM. EXAFS: approximation, parameterization, and chemical transferability of amplitude functions. J Am Chem Soc 2002. [DOI: 10.1021/ja00453a063] [Citation(s) in RCA: 156] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Miller KD, Coughlin MT, Lee PA. Fertility after unilateral cryptorchidism. Paternity, time to conception, pretreatment testicular location and size, hormone and sperm parameters. Horm Res 2002; 55:249-53. [PMID: 11740148 DOI: 10.1159/000050005] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To further evaluate whether fertility is decreased among a cohort of men with previous unilateral cryptorchidism as compared with a control group of men. SUBJECTS AND METHODS Formerly unilateral cryptorchid men who had undergone orchiopexy between the years of 1955 and 1975 at the Children's Hospital of Pittsburgh and a control group of men who were matched for age of an unrelated surgery at the same institution were evaluated by review of medical records and by completion of a questionnaire. 359 previously cryptorchid men were identified as having attempted paternity. Of these men, 320 had information concerning preoperative testicular location and 163 for preoperative testicular size. 106 of these men had levels of testosterone, inhibin B, FSH, and LH measured, while 95 of the men had semen analyses. RESULTS Among men who had attempted paternity, there was no statistical difference in success of paternity between the previously unilateral group (89.7%) and the control group (93.7%). There was no difference in the mean time to conception (7.1 +/- 0.7 months for the unilateral group vs. 6.9 +/- 2.3 for the control group). Within the unilateral group in regard to success at paternity, no difference was found compared with the age of orchiopexy, preoperative testicular location, or preoperative testicular size. Inhibin B levels were lower among the unilateral group. FSH, LH, testosterone, sperm density, motility and morphology were not different, but considerable variation was noted within the cryptorchid group. CONCLUSIONS In this continued evaluation of a cohort of previously cryptorchid men who had undergone unilateral orchiopexy, paternity does not appear to be significantly compromised after unilateral cryptorchidism. Unilateral cryptorchidism appears to be one of several factors contributing to infertility, similar to those found in the general population. No correlation was found between success at paternity and the age of orchiopexy, preoperative testicular size or preoperative testicular location. Inhibin B levels were lower while FSH, LH, T and sperm parameters did not differ.
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Affiliation(s)
- K D Miller
- Department of Pediatrics, Penn State Milton S. Hershey Medical Center, Hershey, PA 17033-0850, USA
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Balazsi G, Mullie M, Lasswell L, Lee PA, Duh YJ. Laser in situ keratomileusis with a scanning excimer laser for the correction of low to moderate myopia with and without astigmatism. J Cataract Refract Surg 2001; 27:1942-51. [PMID: 11738909 DOI: 10.1016/s0886-3350(01)01017-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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
PURPOSE To evaluate the safety and effectiveness of and patient satisfaction with laser in situ keratomileusis (LASIK) performed with a scanning excimer laser by experienced surgeons to correct low and moderate levels of myopia and astigmatism. SETTING Clinique Laservue, Montreal, Quebec, Canada. METHODS A consecutive series of 125 patients (236 eyes) with myopia of -0.5 to -7.0 diopters (D) and cylinder less than 2.5 D were enrolled in this single-center prospective clinical trial. The patients were treated with LASIK and followed for 6 months. The System-ALK Automated Corneal Shaper microkeratome (Bausch & Lomb Surgical) with a 180 microm thickness plate and the Technolas 217 excimer laser (Bausch & Lomb Surgical) with PlanoScan software for the stromal ablation were used in all procedures. Since this version of PlanoScan tended to undercorrect, a mean of 14.7% was added to the standard nomogram. Patient satisfaction was assessed by questionnaires administered preoperatively and 1 and 6 months postoperatively. Retreatments for enhancement were not performed during the 6-month follow-up. RESULTS Six months after LASIK (86.4% follow-up), the mean postoperative manifest spherical equivalent was +0.02 D +/- 0.64 (SD) compared with a preoperative mean of -4.01 +/- 1.59 D. The uncorrected visual acuity was 20/40 or better in 94.6% of eyes and 20/20 or better in 81.9%. A total of 91.2% were within +/-1.0 D of emmetropia and 73.0% were within +/-0.5 D. Only 2 eyes were overcorrected by >1.0 D. Of the eyes with astigmatic myopia, 86.8% were within +/-1.0 D of the intended cylinder correction (by vector analysis) and 73.0% were within +/-0.5 D. The refractions were generally stable after 1 month, and the change in refraction between postoperative examinations was within +/-0.5 D in 88.0% of eyes. A 1-line decrease in best spectacle-corrected visual acuity was seen in 11.3% of eyes, and no eye lost more than 1 line. An increase of 1 or 2 lines was seen in 45.1%. No intraoperative problems occurred, and the interface was clear in all eyes. At 6 months, most symptoms present significantly more frequently than preoperatively were "mild"; none were "marked" or "severe." A total of 90.5% of eyes were reported with marked to extreme improvement in the overall quality of vision, and 99.0% of patients said they would choose LASIK surgery again. CONCLUSIONS Mild to moderate myopia, with and without astigmatism, was corrected safely, effectively, and predictably with a high degree of patient satisfaction using LASIK with a scanning excimer laser and the System-ALK Automated Corneal Shaper.
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Affiliation(s)
- G Balazsi
- Clinique Laservue, Montreal, Quebec, Canada.
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Abstract
PURPOSE Evaluation of the fertility of a cohort of formerly bilaterally cryptorchid men in comparison with a group of formerly unilaterally cryptorchid men, and a group of control men. MATERIALS AND METHODS Using a detailed questionnaire concerning paternity and factors related to paternity, a cohort of formerly bilateral cryptorchid men were studied and compared with men who had undergone orchiopexy for unilateral cryptorchidism, and a group of control men. All study subjects had had surgery at the Children's Hospital of Pittsburgh, Pittsburgh, Pa., between 1955 and 1975. A subset of the full cohort underwent clinical evaluation that included a physical examination, serum hormonal determination and semen analyses. RESULTS Paternity rates are significantly lower among the formerly bilaterally cryptorchid men who have attempted to father a child (65.3%) as compared to the formerly unilaterally cryptorchid (89.7%; p < 0.001) and control men (93.2%; p < 0.001). Differences in the ability to father children are also apparent when semen and hormone levels are compared between the three groups. The bilateral group has significantly lower sperm density and inhibin B levels, and higher FSH and LH levels, than the unilateral and control groups. CONCLUSIONS Men born with bilateral cryptorchidism have severely compromised fertility in adulthood. This reduction in fertility is clearly shown in comparisons of both paternity rates, and in semen and hormone analyses, between the formerly bilateral, formerly unilateral, and control groups.
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Affiliation(s)
- P A Lee
- Graduate School of Public Health, University of Pittsburgh, PA, USA.
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Tsai JL, Ying YW, Lee PA. Cultural predictors of self-esteem: a study of Chinese American female and male young adults. Cultur Divers Ethnic Minor Psychol 2001; 7:284-97. [PMID: 11506074 DOI: 10.1037/1099-9809.7.3.284] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
This study examined how specific domains of cultural orientation (language, social affiliation, and cultural pride) related to self-esteem for a sample of 174 Chinese American male and 179 Chinese American female college students. Participants completed measures of cultural orientation (General Ethnicity Questionnaire; J.L. Tsai, Y.W. Ying, & P.A. Lee, 2000) and self-esteem (M. Rosenberg, 1965). Cultural orientation significantly predicted self-esteem, above and beyond the contribution of age, gender, grade point average, and socioeconomic status. Specifically, proficiency in English and Chinese languages and pride in Chinese culture were positively correlated with self-esteem, whereas affiliation with Chinese people was negatively correlated with selfesteem. The cultural predictors of self-esteem differed for Chinese American men and women. Whereas self-esteem was mainly related to pride in Chinese culture for Chinese American women, self-esteem was mainly related to English and Chinese language proficiency for Chinese American men. Implications of these findings for understanding Asian Americans are discussed.
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Affiliation(s)
- J L Tsai
- Department of Psychology, Stanford University, USA.
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Lee PA, Coughlin MT, Bellinger MF. No relationship of testicular size at orchiopexy with fertility in men who previously had unilateral cryptorchidism. J Urol 2001; 166:236-9. [PMID: 11435877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
PURPOSE We determined whether testicular size at orchiopexy is predictive of fertility potential and whether size correlates with sperm parameters, hormone levels or testicular volume in adulthood. MATERIALS AND METHODS Testicular size obtained from the operative notes of patients who underwent unilateral orchiopexy was classified as normal, small or large for age. These data were compared with outcome data. Paternity data were included on 166 men who reported achieving or unsuccessfully attempting paternity for 12 or more months. Of the men 49 provided blood for hormone level measurement, 43 underwent semen analysis and in 29 testicular volume was determined. RESULTS In the 166 men, including 98, 65 and 3 with small, normal and large testes for age at orchiopexy, respectively, there was no difference in paternity based on testicular size. Of those who achieved paternity time to conception did not differ based on size. Mean age at surgery also did not differ, nor did the percent of small versus normal testes in the age categories 0 to 2, 3 to 5, 6 to 8 and 9 to 11 years. There was no difference in men with small or normal testicular size at surgery in mean luteinizing hormone, follicle-stimulating hormone, testosterone or inhibin B. Sperm density, motility and morphology, and volume in adulthood of a previously undescended testis, previously descended testis or previously undescended and descended testes did not differ in these 2 groups, although the previously undescended testis was smaller than the contralateral testis. CONCLUSIONS In men with a history of unilateral cryptorchidism small testicular size at orchiopexy is not associated with decreased paternity (89.8%), abnormal hormone levels, a lower sperm count or decreased testicular volume in adulthood.
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Affiliation(s)
- P A Lee
- Department of Pediatrics, Penn State College of Medicine, Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
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Ying YW, Lee PA, Tsai JL, Lee YJ, Tsang M. Relationship of young adult Chinese Americans with their parents: variation by migratory status and cultural orientation. Am J Orthopsychiatry 2001; 71:342-9. [PMID: 11495336 DOI: 10.1037/0002-9432.71.3.342] [Citation(s) in RCA: 18] [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] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
To examine whether Chinese and American cultural orientations mediate the association between migratory status and parent relationship, 122 American-born, 121 early-immigrant, and 110 late-immigrant Chinese young adults were measured on cultural orientation and parent relationship. The poorest relationships were found in the early-immigrant group. Cultural orientation mediated the difference in parent relationship between early and late immigrant groups, but not between early-immigrant and American-born groups. Implications of the findings for research and practice are discussed.
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Affiliation(s)
- Y W Ying
- School of Social Welfare, University of California, Berkeley 94720-7400, USA.
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Kishine J, Lee PA, Wen XG. Staggered local density of states around the vortex in underdoped cuprates. Phys Rev Lett 2001; 86:5365-5368. [PMID: 11384499 DOI: 10.1103/physrevlett.86.5365] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2001] [Indexed: 05/23/2023]
Abstract
We have studied a single vortex with the staggered flux (SF) core based on the SU(2) slave-boson theory of high T(c) superconductors. We find that, whereas the center in the vortex core is a SF state, as one moves away from the core center a correlated staggered modulation of the hopping amplitude chi and pairing amplitude Delta becomes predominant. We predict that in this region the local density of states exhibits staggered modulation when measured on the bonds, which may be directly detected by STM experiments.
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Affiliation(s)
- J Kishine
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Abstract
Infertility may be a consequence of cryptorchidism. We previously reported, using a large study cohort, that 38% of formerly bilateral cryptorchid men, 10% of unilateral cryptorchid men, and 5% of the control group were infertile. Men from this cohort donated blood and semen samples for inhibin B, FSH, LH, testosterone, free testosterone, and semen analyses. Results are reported comparing the entire group; some comparisons are based on normal or low sperm density. Data are also presented for men who had fathered children or had unsuccessfully attempted paternity. Mean (+/-SD) inhibin B levels were lower for the cryptorchid men (109 +/- 59 pg/mL) than the control men (153 +/- 60; P < 0.001), and FSH levels were higher (7.4 +/- 6.2 and 4.0 +/- 3.2; P < 0.0001). Inhibin B levels correlated with all other parameters for the cryptorchid group; however, correlations for the control group were only found with gonadotropins. Among the cryptorchid men, levels were significantly greater among men with normal sperm counts than men with low sperm counts (124 +/- 47 vs. 75 +/- 48 pg/mL; P < 0.0001). No difference was present for the control group (155 +/- 61 vs. 149 +/- 63 pg/mL). When the fertile group (based on paternity) vs. the infertile group (based on attempted paternity) were compared, significant differences were found for the cryptorchid group (117 +/- 62 vs. 73 +/- 52 pg/mL; P < 0.03), but not the control group (163 +/- 62 vs. 146 +/- 73 pg/mL). These data reveal relationships not apparent among the control group of men, which includes infertile men. Inhibin B data suggest that a larger portion of formerly cryptorchid men have compromised testicular function than indicated by paternity data. Low levels of inhibin B among individuals are an indication of diminished seminiferous tubule function and thus compromised potential for fertility. Low inhibin B levels together with elevated FSH levels and decreased sperm density are indicative of a high risk of infertility.
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Affiliation(s)
- P A Lee
- Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey Medical Center, Hershey, Pennsylvania 17033, USA
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Cornil J, Gruhn NE, dos Santos DA, Malagoli M, Lee PA, Barlow S, Thayumanavan S, Marder SR, Armstrong NR, Brédas JL. Joint Experimental and Theoretical Characterization of the Electronic Structure of 4,4‘-Bis(N-m-tolyl-N-phenylamino)biphenyl (TPD) and Substituted Derivatives. J Phys Chem A 2001. [DOI: 10.1021/jp003142o] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Cornil
- Laboratory for Chemistry of Novel Materials, Center for Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, Department of Chemistry, The University of Arizona, 1306 East University Blvd., Tucson, Arizona 85721-0041, and Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - N. E. Gruhn
- Laboratory for Chemistry of Novel Materials, Center for Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, Department of Chemistry, The University of Arizona, 1306 East University Blvd., Tucson, Arizona 85721-0041, and Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - D. A. dos Santos
- Laboratory for Chemistry of Novel Materials, Center for Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, Department of Chemistry, The University of Arizona, 1306 East University Blvd., Tucson, Arizona 85721-0041, and Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - M. Malagoli
- Laboratory for Chemistry of Novel Materials, Center for Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, Department of Chemistry, The University of Arizona, 1306 East University Blvd., Tucson, Arizona 85721-0041, and Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - P. A. Lee
- Laboratory for Chemistry of Novel Materials, Center for Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, Department of Chemistry, The University of Arizona, 1306 East University Blvd., Tucson, Arizona 85721-0041, and Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - S. Barlow
- Laboratory for Chemistry of Novel Materials, Center for Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, Department of Chemistry, The University of Arizona, 1306 East University Blvd., Tucson, Arizona 85721-0041, and Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - S. Thayumanavan
- Laboratory for Chemistry of Novel Materials, Center for Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, Department of Chemistry, The University of Arizona, 1306 East University Blvd., Tucson, Arizona 85721-0041, and Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - S. R. Marder
- Laboratory for Chemistry of Novel Materials, Center for Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, Department of Chemistry, The University of Arizona, 1306 East University Blvd., Tucson, Arizona 85721-0041, and Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - N. R. Armstrong
- Laboratory for Chemistry of Novel Materials, Center for Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, Department of Chemistry, The University of Arizona, 1306 East University Blvd., Tucson, Arizona 85721-0041, and Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - J. L. Brédas
- Laboratory for Chemistry of Novel Materials, Center for Molecular Electronics and Photonics, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, Department of Chemistry, The University of Arizona, 1306 East University Blvd., Tucson, Arizona 85721-0041, and Beckman Institute, California Institute of Technology, Pasadena, California 91125
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Schlettwein D, Hesse K, Gruhn NE, Lee PA, Nebesny KW, Armstrong NR. Electronic Energy Levels in Individual Molecules, Thin Films, and Organic Heterojunctions of Substituted Phthalocyanines. J Phys Chem B 2001. [DOI: 10.1021/jp001912q] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. Schlettwein
- Institut für Angewandte und Physikalische Chemie, FB 2, Universität Bremen, Postfach 33 04 40, D-28334 Bremen, Germany, and Department of Chemistry, The University of Arizona, Tucson, Arizona 85721
| | - K. Hesse
- Institut für Angewandte und Physikalische Chemie, FB 2, Universität Bremen, Postfach 33 04 40, D-28334 Bremen, Germany, and Department of Chemistry, The University of Arizona, Tucson, Arizona 85721
| | - N. E. Gruhn
- Institut für Angewandte und Physikalische Chemie, FB 2, Universität Bremen, Postfach 33 04 40, D-28334 Bremen, Germany, and Department of Chemistry, The University of Arizona, Tucson, Arizona 85721
| | - P. A. Lee
- Institut für Angewandte und Physikalische Chemie, FB 2, Universität Bremen, Postfach 33 04 40, D-28334 Bremen, Germany, and Department of Chemistry, The University of Arizona, Tucson, Arizona 85721
| | - K. W. Nebesny
- Institut für Angewandte und Physikalische Chemie, FB 2, Universität Bremen, Postfach 33 04 40, D-28334 Bremen, Germany, and Department of Chemistry, The University of Arizona, Tucson, Arizona 85721
| | - N. R. Armstrong
- Institut für Angewandte und Physikalische Chemie, FB 2, Universität Bremen, Postfach 33 04 40, D-28334 Bremen, Germany, and Department of Chemistry, The University of Arizona, Tucson, Arizona 85721
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Ying YW, Lee PA, Tsai JL, Hung Y, Lin M, Wan CT. Asian American college students as model minorities: an examination of their overall competence. Cultur Divers Ethnic Minor Psychol 2001; 7:59-74. [PMID: 11244904 DOI: 10.1037/1099-9809.7.1.59] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Educational success among Asian Americans has led to their being labeled the "model minority." At the University of California, Berkeley (UCB), Asian American students have higher grade point averages (GPAs) than Hispanic and African American but not White students, supporting the notion that Asian Americans are more successful compared with other racial minorities. However, success in the classroom does not implicate effective functioning in life, and nonacademic criteria ought to be considered in assessing the validity of the model minority image. Given the increasing diversification of the United States, cross-racial engagement may be an additional contributor to overall competence. This was empirically tested in a group of 642 undergraduates at UCB, including 291 Asian, 197 White, 20 African American, 67 Hispanic, and 56 multiracial students. Overall competence was operationalized by sense of coherence, that is, the extent to which the world is experienced as comprehensible, manageable, and meaningful (A. Antonovsky, 1979, 1987). As predicted, Asian Americans had significantly fewer numbers of cross-racial groups represented in their friendship network than did students of all other races. Lower cross-racial engagement and being Asian (as compared with White) were related to a lower sense of coherence, whereas lower GPA was not. Within the Asian American subsample, cross-racial engagement was again significantly associated with greater coherence, whereas GPA again was not. Thus, extending the definition of success to overall competence, these findings raise questions about the applicability of the model minority label to Asian Americans, despite their academic achievement. Future studies need to assess the reasons for their limited cross-racial engagement and lower sense of coherence and to examine means to assist the development of these strengths.
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Affiliation(s)
- Y W Ying
- School of Social Welfare, 120 Haviland Hall, University of California, Berkeley, California 94720-7400, USA.
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40
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Abstract
In an attempt to determine whether the secular trend toward an earlier onset of puberty has continued over recent decades in the United States of America, published reports concerning the age of attainment of pubertal events have been reviewed. Such reports are very limited and vary in both design and inclusive ages of study subjects. Among females, two recent large cross-sectional studies indicate that fifty percent of females in the United States attain Tanner breast stage 2 at 9.5 to 9.7 years of age. This is younger than previously thought, although adequate earlier studies of girls in the United States are not available for comparison. These two studies also indicate that about 14% of girls attain Tanner stage 2 while 8 years of age; one study extends earlier reporting that about 6% exhibit onset of breast development while 7 years of age. There is no evidence that the age of menarche or the attainment of adult (Tanner 5) breast development has decreased over the past 30 years. The data also suggest an earlier onset of Tanner stage 2 pubic hair but no change in attainment of stage 5. Among males, pubic hair may be appearing at younger ages, but data are inadequate or too inconsistent to allow firm interpretation. The lack of standardization of genital criteria of pubertal onset in the male makes any conclusions regarding secular trends impossible. In summary, earlier secular trends over recent decades related to better health, improved nutrition or socio-economic status, or any putative influence by endocrine disrupters cannot be verified.
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Affiliation(s)
- P A Lee
- Department of Pediatrics, Penn State University College of Medicine, The Milton S. Hershey Medical Center, Hershey 17033-0850, USA.
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41
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Prochaska JO, Velicer WF, Fava JL, Ruggiero L, Laforge RG, Rossi JS, Johnson SS, Lee PA. Counselor and stimulus control enhancements of a stage-matched expert system intervention for smokers in a managed care setting. Prev Med 2001; 32:23-32. [PMID: 11162323 DOI: 10.1006/pmed.2000.0767] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Previous research has demonstrated the efficacy of an interactive expert system intervention for smoking cessation for a general population. The intervention provides individualized feedback that guides participants through the stages of change for cessation. Enhancing the expert system by adding proactive telephone counseling or a stimulus control computer designed to produce nicotine fading could produce preventive programs with greater population impacts. METHODS Four interventions were compared: (a) the interactive expert system intervention; (b) the expert system intervention plus counselor calls; (c) the expert system intervention plus the stimulus control computer; and (d) an assessment only condition. A 4 (intervention) x 4 (occasions) (0,6,12, and 18 months) design was used. Smokers were contacted at home via telephone or mail. The initial subject pool was the 24,178 members of a managed care company. Screening was completed for 19,236 members (79.6%), of whom 4,653 were smokers; 85.3% of the smokers were enrolled. RESULTS Thirty-eight percent were in the precontemplation stage, 45% in the contemplation stage, and only 17% in the preparation stage. At 18 months, the expert system resulted in 23.2% point prevalence abstinence, which was 33% greater than that of assessment only. The counselor enhancement produced increased cessation at 12 months but not at 18 months. The stimulus control computer produced no improvement, resulting in 20% worse cessation rates than the assessment only condition. CONCLUSIONS The enhanced conditions failed to outperform the expert system alone. The study also demonstrated the ability of the interactive expert system to produce significantly greater cessation in a population of smokers than assessment alone.
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Affiliation(s)
- J O Prochaska
- Cancer Prevention Research Center, University of Rhode Island, Kingston, RI 02881-0808, USA.
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42
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Abstract
This paper introduces a new set of orthogonal moment functions based on the discrete Tchebichef polynomials. The Tchebichef moments can be effectively used as pattern features in the analysis of two-dimensional images. The implementation of the moments proposed in this paper does not involve any numerical approximation, since the basis set is orthogonal in the discrete domain of the image coordinate space. This property makes Tchebichef moments superior to the conventional orthogonal moments such as Legendre moments and Zernike moments, in terms of preserving the analytical properties needed to ensure information redundancy in a moment set. The paper also details the various computational aspects of Tchebichef moments and demonstrates their feature representation capability using the method of image reconstruction.
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43
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Lee PA, Coughlin MT, Bellinger MF. Paternity and hormone levels after unilateral cryptorchidism: association with pretreatment testicular location. J Urol 2000; 164:1697-701. [PMID: 11025752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
PURPOSE We determined differences in paternity and levels of the hormones inhibin B, follicle- stimulating hormone, luteinizing hormone, testosterone and free testosterone based on the preoperative location of the undescended testis in men with previous unilateral cryptorchidism. MATERIALS AND METHODS Testicular location was determined by a review of the medical records and paternity or attempted paternity using a detailed questionnaire administered to 320 men with previous unilateral cryptorchidism. In 103 cases we performed semen analysis and measured the levels of the hormones inhibin B, luteinizing hormone, follicle-stimulating hormone, testosterone and free testosterone. Paternity, sperm count and hormonal parameters were compared with cryptorchid testicular location using analysis of variance and chi-square analysis. Logistic regression was done to analyze pretreatment testicular location as a risk factor for infertility. RESULTS Paternity, duration of attempted conception in men who achieved paternity, sperm count and hormone levels did not differ based on pretreatment abdominal, internal ring, inguinal canal, external ring, upper scrotum or ectopic testicular location. The overall paternity rate was 90% with the lowest rate of 83.3% in the abdominal group. More than 12 months were required to achieve conception in 28.9% of the study group overall and in 39.4% of the abdominal group. Varicocele and a partner with fertility problems were risk factors for infertility, while abdominal testicular location caused borderline significant risk. CONCLUSIONS Preoperative testicular location in men with previous unilateral cryptorchidism is not a major determinant of fertility according to paternity, sperm count or hormone levels.
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Affiliation(s)
- P A Lee
- Department of Pediatrics, Penn State University College of Medicine, Milton S. Hershey Medical Center, Hershey, Pennsylvania
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44
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Honore PM, Jamez J, Wauthier M, Lee PA, Dugernier T, Pirenne B, Hanique G, Matson JR. Prospective evaluation of short-term, high-volume isovolemic hemofiltration on the hemodynamic course and outcome in patients with intractable circulatory failure resulting from septic shock. Crit Care Med 2000; 28:3581-7. [PMID: 11098957 DOI: 10.1097/00003246-200011000-00001] [Citation(s) in RCA: 320] [Impact Index Per Article: 13.3] [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: 11/26/2022]
Abstract
OBJECTIVE To evaluate the effects of short-term, high-volume hemofiltration (STHVH) on hemodynamic and metabolic status and 28-day survival in patients with refractory septic shock. DESIGN Prospective, interventional. SETTING Intensive care unit (ICU), tertiary institution. PATIENTS Twenty patients with intractable cardiocirculatory failure complicating septic shock, who had failed to respond to conventional therapy. INTERVENTIONS STHVH, followed by conventional continuous venovenous hemofiltration. STHVH consisted of a 4-hr period during which 35 L of ultrafiltrate is removed and neutral fluid balance is maintained. Subsequent conventional continuous venovenous hemofiltration continued for at least 4 days. MEASUREMENTS AND MAIN RESULTS Cardiac index, systemic vascular resistance, pulmonary vascular resistance, oxygen delivery, mixed venous oxygen saturation, arterial pH, and lactate were measured serially. Fluid and inotropic support were managed by protocol. Therapeutic endpoints were as follows during STHVH: a) by 2 hrs, a > or =50% increase in cardiac index; b) by 2 hrs, a > or =25% increase in mixed venous saturation; c) by 4 hrs, an increase in arterial pH to >7.3; d) by 4 hrs, a > or =50% reduction in epinephrine dose. Patients who attained all four goals (11 of 20) were considered hemodynamic "responders"; patients who did not (9 of 20) were considered hemodynamic "nonresponders." There were no differences in baseline hemodynamic, metabolic, and Acute Physiology and Chronic Health Evaluation and Simplified Acute Physiology Scores between responders and nonresponders. Survival to 28 days was better among responders (9 of 11 patients) than among nonresponders (0 of 9). Factors associated with survival were hemodynamic-metabolic response status, time interval from ICU admission to initiation of STHVH, and body weight. CONCLUSIONS These data suggest that STHVH may be of major therapeutic value in the treatment of intractable cardiocirculatory failure complicating septic shock. Early initiation of therapy and adequate dose may improve hemodynamic and metabolic responses and 28-day survival.
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Affiliation(s)
- P M Honore
- Department of Intensive Care Medicine, St-Pierre Hospital, Ottignies, Belgium.
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45
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Abstract
Cryptorchidism is a common anomaly of male sexual differentiation. Two phases of testicular descent are recognized, transabdominal and inguinoscrotal. With evidence that androgens and Müllerian inhibitory hormone were not completely responsible for testicular descent, the existence of a third testicular hormone mediating testicular descent was postulated. Insulin-like 3 (INSL3) [also known as relaxin-like factor (RLF) and Leydig insulin-like protein (LEY I-L)] is a member of the insulin/relaxin hormone superfamily that is highly expressed in Leydig cells. The phenotype of transgenic mice with targeted deletion of the Insl3 gene was bilateral cryptorchidism with morphological evidence of abnormal gubernacular development. With this implicit evidence that Insl3 mediates testicular descent in mice, we performed mutation detection analysis of the coding regions of the 2 exon INSL3 gene in genomic DNA samples obtained from 145 formerly cryptorchid patients and 36 adult male controls. Single-strand conformational polymorphism analysis was used for the mutation detection studies. Two mutations, R49X and P69L, and several polymorphisms were identified. Both mutations were located in the connecting peptide region of the protein. The frequency of INSL3/RLF gene mutations as a cause of cryptorchidism is low, because only 2 of 145 (1.4%) formerly cryptorchid patients were found to have mutations.
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Affiliation(s)
- M Tomboc
- Division of Pediatric Endocrinology, Children's Hospital of Pittsburgh, University of Pittsburgh, Pennsylvania 15213, USA
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46
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Lee PA, Blatt LM, Blanchard KS, Bouhana KS, Pavco PA, Bellon L, Sandberg JA. Pharmacokinetics and tissue distribution of a ribozyme directed against hepatitis C virus RNA following subcutaneous or intravenous administration in mice. Hepatology 2000; 32:640-6. [PMID: 10960462 DOI: 10.1053/jhep.2000.16599] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A nuclease resistant ribozyme targeting the 5' untranslated region (5' UTR) of hepatitis C virus (HCV) at site 195 has been identified. To investigate the therapeutic utility of this ribozyme, we evaluated the pharmacokinetics and tissue distribution with two labeled forms of this ribozyme. [(32)P]-labeled ribozyme was administered as a single subcutaneous (SC) or intravenous (IV) bolus at a dose of 10 mg/kg or 30 mg/kg in C57Bl/6 mice. Regardless of route of administration, peak liver concentrations achieved were greater than the concentration necessary to inhibit HCV-IRES-luciferase expression in cell culture. The ribozyme was well absorbed after SC administration (89%) and had an elimination half-life of 23 minutes. To show intracellular localization of the ribozyme in target tissue, a tetramethyl rhodamine (TMR)-labeled ribozyme was administered as a single SC or IV bolus at a dose of 30 mg/kg in C57Bl/6 mice. Mice treated SC or IV with TMR-labeled ribozyme had positive fluorescence in the liver from 15 minutes to 48 hours after dosing. Definite positive fluorescence was still present at 72 hours in the mice dosed via the IV route. At early time points (15 and 30 minutes postinjection), nuclear and possibly cytoplasmic fluorescence was present in the hepatocytes, and sinusoidal fluorescence was intense. At the later time points, fluorescence became more punctate. Abundant staining was often present in Kupffer cells. This study confirms the retention of ribozyme in liver cells and supports the potential of an anti-HCV ribozyme as a therapeutic agent for treatment of chronic hepatitis C.
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Affiliation(s)
- P A Lee
- Ribozyme Pharmaceuticals Inc., Boulder, CO 80301, USA
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47
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Guy J, Spalluto C, McMurray A, Hearn T, Crosier M, Viggiano L, Miolla V, Archidiacono N, Rocchi M, Scott C, Lee PA, Sulston J, Rogers J, Bentley D, Jackson MS. Genomic sequence and transcriptional profile of the boundary between pericentromeric satellites and genes on human chromosome arm 10q. Hum Mol Genet 2000; 9:2029-42. [PMID: 10942432 DOI: 10.1093/hmg/9.13.2029] [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: 11/12/2022] Open
Abstract
The organization of centromeric heterochromatin has been established in a number of eucaryotes but remains poorly defined in human. Here we present 1025 kb of contiguous human genomic sequence which links pericentromeric satellites to the RET proto-oncogene in 10q11.2 and is presumed to span the transition from centric heterochromatin to euchromatin on this chromosome arm. Two distinct domains can be defined within the sequence. The proximal approximately 240 kb consists of arrays of satellites and other tandem repeats separated by tracts of complex sequence which have evolved by pericentromeric-directed duplication. Analysis of 32 human paralogues of these sequences indicates that most terminate at or within repeat arrays, implicating these repeats in the interchromosomal duplication process. Corroborative PCR-based analyses establish a genome-wide correlation between the distribution of these paralogues and the distribution of satellite families present in 10q11. In contrast, the distal approximately 780 kb contains few tandem repeats and is largely chromosome specific. However, a minimum of three independent intrachromosomal duplication events have resulted in >370 kb of this sequence sharing >90% identity with sequences on 10p. Using computer-based analyses and RT-PCR we confirm the presence of three genes within the sequence, ZNF11/33B, KIAA0187 and RET, in addition to five transcripts of unknown structure. All of these transcribed sequences map distal to the satellite arrays. The boundary between satellite-rich interchromosomally duplicated DNA and chromosome-specific DNA therefore appears to define a transition from pericentromeric heterochromatin to euchromatin on the long arm of this chromosome.
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MESH Headings
- Centromere/genetics
- Centromere/metabolism
- Chromosomes, Artificial, Yeast
- Chromosomes, Human, Pair 10/genetics
- DNA, Satellite/genetics
- DNA, Satellite/metabolism
- Drosophila Proteins
- Electrophoresis, Gel, Pulsed-Field
- Heterochromatin/genetics
- Heterochromatin/metabolism
- Humans
- Hybrid Cells
- Molecular Sequence Data
- Proto-Oncogene Mas
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins/metabolism
- Proto-Oncogene Proteins c-ret
- Receptor Protein-Tyrosine Kinases/genetics
- Receptor Protein-Tyrosine Kinases/metabolism
- Restriction Mapping
- Reverse Transcriptase Polymerase Chain Reaction
- Sequence Analysis, DNA
- Transcription, Genetic
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Affiliation(s)
- J Guy
- Human Genetics Unit, School of Biochemistry and Genetics, University of Newcastle upon Tyne, UK
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48
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Abstract
The conception of depression in Chinese American college students was examined with the Center for Epidemiologic Studies--Depression Scale (CES-D). It was hypothesized that, because of their significant engagement with mainstream American culture, these students' conception of depression would better approximate White Americans' differentiated view (L. Radloff, 1977) than the general Chinese American community's integrated view (Y. Ying, 1988). A total of 353 bicultural Chinese American college students participated in the study. Consistent with the hypothesis, principal-components factor analysis with varimax rotation revealed a factor structure and loading similar to that found in White American adults. Confirmatory factor analysis also showed Chinese American college students to better approximate Radloff's differentiated model based on her White American samples than Ying's integrated model based on her Chinese American community sample. Implications of the findings and directions for future research are discussed.
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Affiliation(s)
- Y W Ying
- School of Social Welfare, University of California, Berkeley 94720-7400, USA
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Ivanov DA, Lee PA, Wen XG. Staggered-vorticity correlations in a lightly doped t-J model: A variational approach. Phys Rev Lett 2000; 84:3958-3961. [PMID: 11019249 DOI: 10.1103/physrevlett.84.3958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/1999] [Indexed: 05/23/2023]
Abstract
We report staggered-vorticity correlations of current in the d-wave variational wave function for the lightly doped t-J model. Such correlations are explained from the SU(2) symmetry relating d-wave and staggered-flux mean-field phases. The correlation functions computed by the variational Monte Carlo method suggest that pairs are formed of holes circulating in opposite directions.
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Affiliation(s)
- DA Ivanov
- Department of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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50
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Witchel SF, Fagerli J, Siegel J, Smith R, Mitwally MF, Lewy V, Arslanian S, Lee PA. No association between body mass index and beta(3)-adrenergic receptor variant (W64R) in children with premature pubarche and adolescent girls with hyperandrogenism. Fertil Steril 2000; 73:509-15. [PMID: 10689004 DOI: 10.1016/s0015-0282(99)00568-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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: 11/23/2022]
Abstract
OBJECTIVE To determine if the Trp(64)Arg (W64R) variant of the beta(3)-adrenergic receptor (ADRB3) could be used as a genetic marker to define risk for polycystic ovary syndrom (PCOS) and/or obesity in children and adolescents. DESIGN Association study. SETTING Academic research environment. PATIENT(S) Children referred for evaluation of premature pubic hair (n = 63), adolescent girls referred for evaluation of hirsutism and/or oligomenorrhea (n = 33), and healthy adult controls (n = 67). INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Relationship of body mass index (BMI) to presence or absence of W64R variant and frequency of W64R variant in our patient population. RESULT(S) Body mass index (kg/m(2)) was determined for 63 children (55 girls and 8 boys) and 33 adolescent girls. Presence or absence of the W64R variant was assayed by polymerase chain reaction (PCR) amplification followed by allele-specific restriction fragment digest. Twelve subjects and 11 healthy controls were found to be heterozygous for the W64R variant. One subject was found to be homozygous for the W64R variant. Allele frequency for the W64R variant was comparable between patients and controls. Among the patients, mean BMI values were not different between carriers and noncarriers. CONCLUSION(S) Although other studies suggest that the W64R variant is associated with the development of obesity and insulin resistance, we cannot demonstrate that it has a major effect on BMI in children with premature pubarche or in adolescent girls with hyperandrogenism. Serial observations are necessary to determine if this variant predicts the development of obesity and/or PCOS in adulthood.
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Affiliation(s)
- S F Witchel
- Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA.
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