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O’Neill A, Seidman J, Cavagnero K, Li F, Nakatsuji T, Cheng J, Tong Y, Do T, Cau L, Hata T, Modlin R, Gallo R. 349 Functional screening of Cutibacterium acnes isolates reveal determinants of skin inflammation. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.362] [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: 11/19/2022]
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2
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Canty E, Do T, Joshi S. GASTROINTESTINAL SYMPTOMS WITH ASPIRIN-EXACERBATED RESPIRATORY DISEASE MAY INCREASE RISK FOR FAILURE DURING RAPID ASPIRIN DESENSITIZATION. Ann Allergy Asthma Immunol 2022. [DOI: 10.1016/j.anai.2022.08.546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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3
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Bareiss AK, Kattar N, Tivis R, Unis G, Do T, Montelibano L, Price-Haywood EG, McCoul E. Healthcare utilization for sinusitis after pneumococcal vaccination in patients with low antibody titers. Int Forum Allergy Rhinol 2021; 12:1018-1024. [PMID: 34962358 DOI: 10.1002/alr.22954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/29/2021] [Accepted: 12/15/2021] [Indexed: 11/05/2022]
Abstract
BACKGROUND Pneumococcal antibody deficiency has been the subject of limited study in chronic rhinosinusitis (CRS) and has not been studied in recurrent acute rhinosinusitis (RARS). The 23-valent pneumococcal polysaccharide vaccine (PPSV23) is considered for patients with non-protective Streptococcus pneumoniae titers. We hypothesized that both RARS and CRS patients with deficient S. pneumoniae titers and subsequent PPSV23 vaccination would have reduced healthcare encounters for sinusitis and fewer prescriptions for antibiotics or steroids. METHODS A retrospective cohort study was performed of patient encounters between January 2011 and December 2019. All patients included were ≥18 and ≤65 years old with a diagnosis of CRS or RARS and pneumococcal titer data. Patients with immunodeficiency and comorbid conditions requiring PPSV23 vaccination prior to the age of 65 were excluded. RESULTS A total of 938 patients were included. Non-protective antibody titers were present in 75.8% of CRS and 74.8% of RARS patients. 306 patients with deficient antibody titers received the PPSV23 vaccine. 89% of CRS and 90.1% of RARS patients had protective responses. Among 217 patients with continuous data from 2 years before through 2 years after PPSV23 vaccination, a decrease in the number of encounter diagnoses of CRS (p<0.0001) and RARS (p = 0.0006) was observed. Decreases in the frequency of antibiotic (p = 0.002) and corticosteroid (p = 0.04) prescriptions were also appreciated. CONCLUSIONS Most patients with CRS and RARS have non-protective antibody titers. PPSV23 administration significantly decreases healthcare utilization. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Anna K Bareiss
- Department of Otolaryngology - Head and Neck Surgery, Tulane University
| | - Nrusheel Kattar
- Department of Otorhinolaryngology, Ochsner Clinic Foundation
| | - Rick Tivis
- Center for Outcomes Research, Ochsner Clinic Foundation
| | - Graham Unis
- Department of Otorhinolaryngology, Ochsner Clinic Foundation
| | - Triet Do
- Department of Otolaryngology - Head and Neck Surgery, Tulane University
| | | | - Eboni G Price-Haywood
- Center for Outcomes Research, Ochsner Clinic Foundation.,Ochsner Clinical School, University of Queensland
| | - Edward McCoul
- Department of Otolaryngology - Head and Neck Surgery, Tulane University.,Department of Otorhinolaryngology, Ochsner Clinic Foundation.,Ochsner Clinical School, University of Queensland
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Abstract
Since the discovery of bioactive molecules sequestered in dentine, researchers have been exploring ways to harness their activities for dental regeneration. One specific area, discussed in this review, is that of dental-pulp capping. Dental-pulp caps are placed when the dental pulp is exposed due to decay or trauma in an attempt to enhance tertiary dentine deposition. Several materials are used for dental-pulp capping; however, natural biomimetic scaffolds may offer advantages over manufactured materials such as improved aesthetic, biocompatibility and success rate. The present review discusses and appraises the current evidence surrounding biomimetic dental-pulp capping, with a focus on bioactive molecules sequestered in dentine. Molecules covered most extensively in the literature include transforming growth factors (TGF-βs, specifically TGF-β1) and bone morphogenetic proteins (BMPs, specifically BMP-2 and BMP-7). Further studies would need to explore the synergistic use of multiple peptides together with the development of a tailored scaffold carrier. The roles of some of the molecules identified in dentine need to be explored before they can be considered as potential bioactive molecules in a biomimetic scaffold for dental-pulp capping. Future in vivo work needs to consider the inflammatory environment of the dental pulp in pulpal exposures and compare pulp-capping materials.
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Affiliation(s)
| | | | | | - G A Feichtinger
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds,
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5
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Sommer C, Do T, Pan F, Ryschich E, Vollherbst D, Jugold M, Kauczor H, Pereira P, Richter G. Abstract No. 705 A new type of radiopaque doxorubicin-loaded microsphere created on the Embozene microspheres platform: in vitro characterization and comparison with controls. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.764] [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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6
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Sommer C, Pan F, Do T, Pereira P, Richter G, Vollherbst D, Kauczor H. 3:00 PM Abstract No. 127 Computed tomography–guided IrReversible Electroporation of hepatocellular carcinoma smaller than 2 cm: the value of transarterial Pre-MARKing with iodized oil for improved guidance during electrode positioning. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.159] [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] Open
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7
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Hees A, Do T, Roberts BM, Ghez AM, Nishiyama S, Bentley RO, Gautam AK, Jia S, Kara T, Lu JR, Saida H, Sakai S, Takahashi M, Takamori Y. Search for a Variation of the Fine Structure Constant around the Supermassive Black Hole in Our Galactic Center. Phys Rev Lett 2020; 124:081101. [PMID: 32167338 DOI: 10.1103/physrevlett.124.081101] [Citation(s) in RCA: 3] [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: 12/21/2019] [Accepted: 01/23/2020] [Indexed: 06/10/2023]
Abstract
Searching for space-time variations of the constants of Nature is a promising way to search for new physics beyond general relativity and the standard model motivated by unification theories and models of dark matter and dark energy. We propose a new way to search for a variation of the fine-structure constant using measurements of late-type evolved giant stars from the S star cluster orbiting the supermassive black hole in our Galactic Center. A measurement of the difference between distinct absorption lines (with different sensitivity to the fine structure constant) from a star leads to a direct estimate of a variation of the fine structure constant between the star's location and Earth. Using spectroscopic measurements of five stars, we obtain a constraint on the relative variation of the fine structure constant below 10^{-5}. This is the first time a varying constant of nature is searched for around a black hole and in a high gravitational potential. This analysis shows new ways the monitoring of stars in the Galactic Center can be used to probe fundamental physics.
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Affiliation(s)
- A Hees
- SYRTE, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, LNE, 61 avenue de l'Observatoire 75014 Paris, France
| | - T Do
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - B M Roberts
- SYRTE, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, LNE, 61 avenue de l'Observatoire 75014 Paris, France
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - A M Ghez
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - S Nishiyama
- Miyagi University of Education, 149 Aramaki-aza-aoba, Aoba-ku, Sendai, Miyagi 980-0845, Japan
| | - R O Bentley
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - A K Gautam
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - S Jia
- Astronomy Department, University of California, Berkeley, California 94720, USA
| | - T Kara
- Miyagi University of Education, 149 Aramaki-aza-aoba, Aoba-ku, Sendai, Miyagi 980-0845, Japan
| | - J R Lu
- Astronomy Department, University of California, Berkeley, California 94720, USA
| | - H Saida
- Daido University, 10-3 Takiharu-cho, Minami-ku, Nagoya, Aichi 457-8530, Japan
| | - S Sakai
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - M Takahashi
- Aichi University of Education, 1 Hirosawa, Igaya-cho, Kariya, Aichi 448-8542, Japan
| | - Y Takamori
- National Institute of Technology, Wakayama College, 77 Noshima, Nada-cho, Gobo, Wakayama 644-0023, Japan
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Darnieder LM, Melón LC, Do T, Walton NL, Miczek KA, Maguire JL. Female-specific decreases in alcohol binge-like drinking resulting from GABA A receptor delta-subunit knockdown in the VTA. Sci Rep 2019; 9:8102. [PMID: 31147611 PMCID: PMC6542821 DOI: 10.1038/s41598-019-44286-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 05/08/2019] [Indexed: 02/07/2023] Open
Abstract
Binge drinking is short-term drinking that achieves blood alcohol levels of 0.08 g/dl or above. It exhibits well-established sex differences in GABAergic inhibitory neurotransmission, including extrasynaptic δ subunit-containing GABAA receptors (δ-GABAARs) that mediate tonic inhibition, or synaptic γ2-containing GABAARs which underlie fast, synaptic, phasic inhibition have been implicated in sex differences in binge drinking. Ovarian hormones regulate δ-GABAARs, further implicating these receptors in potential sex differences. Here, we explored the contribution of extrasynaptic δ-GABAARs to male and female binge-like drinking in a critical area of mesolimbic circuitry-the ventral tegmental area (VTA). Quantitative PCR revealed higher Gabrd transcript levels and larger tonic currents in the VTA of females compared to males. In contrast, male and female Gabrg2 transcript levels and measures of phasic inhibition were equivalent. Intra-VTA infusion of AAV-Cre-GFP in floxed Gabrd mice downregulated δ-GABAARs and decreased binge-like drinking in females. There was no significant difference in either male or female mice after GABAAR γ2 subunit reduction in the VTA following AAV-Cre-GFP infusion in floxed Gabrg2 mice. Collectively, these findings suggest sex differences and GABAAR subunit specificity in alcohol intake.
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Affiliation(s)
- L M Darnieder
- Graduate Program in Neuroscience, Sackler School of Graduate Biomedical Sciences, Tufts University, Boston, MA, 02111, USA
| | - L C Melón
- Tufts University School of Medicine, Department of Neuroscience, Boston, MA, 02111, USA
| | - T Do
- Northeastern University, Bouvé College of Health Sciences, Boston, MA, 02115, USA
| | - N L Walton
- University of Massachusetts Boston, Honors College of Nursing and Health Sciences, Boston, MA, 02125, USA
| | - K A Miczek
- Tufts University School of Medicine, Department of Neuroscience, Boston, MA, 02111, USA
- Tufts University, Psychology Department, Medford, MA, 02155, USA
| | - J L Maguire
- Tufts University School of Medicine, Department of Neuroscience, Boston, MA, 02111, USA.
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Hong J, Do T, Butt M, Chu C, Zaenglein A. 625 Retrospective review and telephone follow-up of adverse events resulting from standardized isotretinoin lab monitoring. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Phan HTT, Stoesser N, Maciuca IE, Toma F, Szekely E, Flonta M, Hubbard ATM, Pankhurst L, Do T, Peto TEA, Walker AS, Crook DW, Timofte D. Illumina short-read and MinION long-read WGS to characterize the molecular epidemiology of an NDM-1 Serratia marcescens outbreak in Romania. J Antimicrob Chemother 2019; 73:672-679. [PMID: 29237003 PMCID: PMC5890751 DOI: 10.1093/jac/dkx456] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 11/06/2017] [Indexed: 11/30/2022] Open
Abstract
Background and Objectives Serratia marcescens is an emerging nosocomial pathogen, and the carbapenemase blaNDM has been reported in several surveys in Romania. We aimed to investigate the molecular epidemiology of S. marcescens in two Romanian hospitals over 2010–15, including a neonatal NDM-1 S. marcescens outbreak. Methods Isolates were sequenced using Illumina technology together with carbapenem-non-susceptible NDM-1-positive and NDM-1-negative Klebsiella pneumoniae and Enterobacter cloacae to provide genomic context. A subset was sequenced with MinION to fully resolve NDM-1 plasmid structures. Resistance genes, plasmid replicons and ISs were identified in silico for all isolates; an annotated phylogeny was reconstructed for S. marcescens. Fully resolved study NDM-1 plasmid sequences were compared with the most closely related publicly available NDM-1 plasmid reference. Results 44/45 isolates were successfully sequenced (S. marcescens, n = 33; K. pneumoniae, n = 7; E. cloacae, n = 4); 10 with MinION. The S. marcescens phylogeny demonstrated several discrete clusters of NDM-1-positive and -negative isolates. All NDM-1-positive isolates across species harboured a pKOX_NDM1-like plasmid; more detailed comparisons of the plasmid structures demonstrated a number of differences, but highlighted the largely conserved plasmid backbones across species and hospital sites. Conclusions The molecular epidemiology is most consistent with the importation of a pKOX_NDM1-like plasmid into Romania and its dissemination amongst K. pneumoniae/E. cloacae and subsequently S. marcescens across hospitals. The data suggested multiple acquisitions of this plasmid by S. marcescens in the two hospitals studied; transmission events within centres, including a large outbreak on the Targu Mures neonatal unit; and sharing of the pKOX_NDM1-like plasmid between species within outbreaks.
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Affiliation(s)
- H T T Phan
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK.,National Institute for Health Research (NIHR) Health Protection Research Unit (NIHR HPRU) in Healthcare Associated Infections and Antimicrobial Resistance, University of Oxford, Oxford, UK
| | - N Stoesser
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - I E Maciuca
- Institute of Veterinary Science, University of Liverpool, Leahurst Campus, UK
| | - F Toma
- Microbiology Department, University of Medicine and Pharmacy, Targu Mures, Romania
| | - E Szekely
- Microbiology Department, University of Medicine and Pharmacy, Targu Mures, Romania
| | - M Flonta
- Clinical Hospital of Infectious Diseases, Cluj-Napoca, Romania
| | - A T M Hubbard
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - L Pankhurst
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - T Do
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - T E A Peto
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK.,National Institute for Health Research (NIHR) Health Protection Research Unit (NIHR HPRU) in Healthcare Associated Infections and Antimicrobial Resistance, University of Oxford, Oxford, UK
| | - A S Walker
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK.,National Institute for Health Research (NIHR) Health Protection Research Unit (NIHR HPRU) in Healthcare Associated Infections and Antimicrobial Resistance, University of Oxford, Oxford, UK
| | - D W Crook
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK.,National Institute for Health Research (NIHR) Health Protection Research Unit (NIHR HPRU) in Healthcare Associated Infections and Antimicrobial Resistance, University of Oxford, Oxford, UK
| | - D Timofte
- Institute of Veterinary Science, University of Liverpool, Leahurst Campus, UK.,Institute of Infection and Global Health, University of Liverpool, Liverpool, UK
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11
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Witzel G, Martinez G, Hora J, Willner SP, Morris MR, Gammie C, Becklin EE, Ashby MLN, Baganoff F, Carey S, Do T, Fazio GG, Ghez A, Glaccum WJ, Haggard D, Herrero-Illana R, Ingalls J, Narayan R, Smith HA. Variability Timescale and Spectral Index of Sgr A* in the Near Infrared: Approximate Bayesian Computation Analysis of the Variability of the Closest Supermassive Black Hole. Astrophys J 2018; 863:15. [PMID: 32855558 PMCID: PMC7449233 DOI: 10.3847/1538-4357/aace62] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Sagittarius A* (Sgr A*) is the variable radio, near-infrared (NIR), and X-ray source associated with accretion onto the Galactic center black hole. We present an analysis of the most comprehensive NIR variability data set of Sgr A* to date: eight 24 hr epochs of continuous monitoring of Sgr A* at 4.5 μm with the IRAC instrument on the Spitzer Space Telescope, 93 epochs of 2.18 μm data from Naos Conica at the Very Large Telescope, and 30 epochs of 2.12 μm data from the NIRC2 camera at the Keck Observatory, in total 94,929 measurements. A new approximate Bayesian computation method for fitting the first-order structure function extracts information beyond current fast Fourier transformation (FFT) methods of power spectral density (PSD) estimation. With a combined fit of the data of all three observatories, the characteristic coherence timescale of Sgr A* isτ b = 243 - 57 + 82 minutes (90% credible interval). The PSD has no detectable features on timescales down to 8.5 minutes (95% credible level), which is the ISCO orbital frequency for a dimensionless spin parameter a = 0.92. One light curve measured simultaneously at 2.12 and 4.5 μm during a low flux-density phase gave a spectral index α s = 1.6 ± 0.1( F ν ∝ ν - α s ) . This value implies that the Sgr A* NIR color becomes bluer during higher flux-density phases. The probability densities of flux densities of the combined data sets are best fit by log-normal distributions. Based on these distributions, the Sgr A* spectral energy distribution is consistent with synchrotron radiation from a non-thermal electron population from below 20 GHz through the NIR.
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Affiliation(s)
- G Witzel
- University of California, Los Angeles, CA, USA
| | - G Martinez
- University of California, Los Angeles, CA, USA
| | - J Hora
- Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
| | - S P Willner
- Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
| | - M R Morris
- University of California, Los Angeles, CA, USA
| | - C Gammie
- Department of Astronomy, University of Illinois, 1002 West Green Street, Urbana, IL 61801, USA
| | - E E Becklin
- University of California, Los Angeles, CA, USA
- SOFIA Science Center, Moffett Field, CA, USA
| | - M L N Ashby
- Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
| | - F Baganoff
- MIT Kavli Institute for Astrophysics and Space Research, Cambridge, MA 02139, USA
| | - S Carey
- Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125, USA
| | - T Do
- University of California, Los Angeles, CA, USA
| | - G G Fazio
- Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
| | - A Ghez
- University of California, Los Angeles, CA, USA
| | - W J Glaccum
- Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125, USA
| | - D Haggard
- Department of Physics, McGill University, 3600 University Street, Montreal, QC H3A 2T8, Canada
- McGill Space Institute, McGill University, Montreal, QC H3A 2A7, Canada
| | - R Herrero-Illana
- European Southern Observatory (ESO), Alonso de Córdova 3107, Vitacura, Casilla 19001, Santiago de Chile, Chile
| | - J Ingalls
- Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125, USA
| | - R Narayan
- Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
| | - H A Smith
- Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
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12
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Adler-Moore JP, Ernst W, Kim H, Ward N, Chiang SM, Do T, Fujii G. Monomeric M2e antigen in VesiVax ® liposomes stimulates protection against type a strains of influenza comparable to liposomes with multimeric forms of M2e. J Liposome Res 2017; 27:210-220. [PMID: 28922045 DOI: 10.1080/08982104.2017.1381708] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Given the interest in the ectodomain of the matrix 2 (M2e) channel protein as a target for development of a universal influenza vaccine, we examined the role of the antigen configuration of M2e in generating a protective immune response. A series of M2e mutations and a truncated M2e segment were prepared as a means of controlling the formation of monomer, dimer, and higher order multimeric forms of M2e. Each of these M2e peptides was incorporated into a liposome-based vaccine technology platform previously shown to stimulate a protective response to influenza A infection using M2e as a mixture of monomers, dimers and multimers (L-M2e1-HD/MPL). Our results using these modified forms of M2e produced 90-100% survival following lethal challenge with H1N1 (A/PR/8/34) in both inbred BALB/c and outbred Swiss Webster mice vaccinated with a truncated monomeric form of the M2 protein, M2e1-15 in liposomes. These observations show that a tetrameric configuration is not required to elicit significant protection when the M2e antigen is formulated in immunogenic liposomes and further, that the first 15 amino acids of M2e likely play a primary role in providing the protective immune response.
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Affiliation(s)
- J P Adler-Moore
- a Department of Biological Sciences , California State Polytechnic University , Pomona , CA , USA
| | - W Ernst
- b Molecular Express Inc , Rancho Dominguez , CA , USA
| | - H Kim
- a Department of Biological Sciences , California State Polytechnic University , Pomona , CA , USA
| | - N Ward
- a Department of Biological Sciences , California State Polytechnic University , Pomona , CA , USA
| | - S M Chiang
- b Molecular Express Inc , Rancho Dominguez , CA , USA
| | - T Do
- b Molecular Express Inc , Rancho Dominguez , CA , USA
| | - G Fujii
- b Molecular Express Inc , Rancho Dominguez , CA , USA
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13
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Cheng Z, Do T, Mankia K, Meade J, Hunt L, Nam J, Tugnait A, Speirs A, Clerehugh V, Emery P, Devine D. The subgingival microbiomes in periodontitis and health of individuals with rheumatoid arthritis and at risk of developing rheumatoid arthritis. J Oral Microbiol 2017. [PMCID: PMC5646645 DOI: 10.1080/20002297.2017.1325216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Serum anti-citrullinated protein antibodies (ACPAs), present in 70% of people with rheumatoid arthritis (RA), can be detected ≤10years before the onset of clinical disease. RA and periodontitis are epidemiologically associated and we have reported a high incidence of periodontitis in people who are ACPA+ and at risk of RA. Periodontal bacteria may contribute by multiple routes to the generation of RA-autoantibodies. This study aims to characterise the subgingival microbiomes from periodontitis and health in individuals with/without RA and at risk of RA. Forty-five ACPA+ no RA (RA-at-risk; RAR), 31 healthy controls (HC) and 30 ACPA+ RA patients (RA) underwent a periodontal examination. DNA from subgingival plaque from healthy and deep pocket sites were paired-end sequenced using the Illumina HiSeq3000 and data analysed using MG-RAST + DESeq. Metagenomes in RA samples had high proportions of Actinobacteria; RAR microbiomes contained higher proportions of Bacteroidetes than HC. The relative abundance of P. gingivalis was high in periodontitis and RAR; Aggregatibacter actinomycetemcomitans was detected with similar frequency in each group. Other bacteria implicated in periodontitis and/or autoantibody generation (Filifactor alocis, Prevotella spp, Leptotrichia spp.) were detected. Analyses are on-going to elucidate the diversity and functional potential of the subgingival microbiome associated with RA.
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Affiliation(s)
- Z. Cheng
- Division of Oral Biology, University of Leeds, School of Dentistry, UK
| | - T. Do
- Division of Oral Biology, University of Leeds, School of Dentistry, UK
| | - K. Mankia
- Leeds Musculoskeletal Biomedical Research Centre, University of Leeds, School of Medicine, UK
| | - J.L. Meade
- Division of Oral Biology, University of Leeds, School of Dentistry, UK
| | - L. Hunt
- Leeds Musculoskeletal Biomedical Research Centre, University of Leeds, School of Medicine, UK
| | - J. Nam
- Leeds Musculoskeletal Biomedical Research Centre, University of Leeds, School of Medicine, UK
| | - A. Tugnait
- Division of Restorative Dentistry, University of Leeds, School of Dentistry, UK
| | - A. Speirs
- Leeds Dental Institute, Leeds Teaching Hospitals Trust, UK
| | - V. Clerehugh
- Division of Restorative Dentistry, University of Leeds, School of Dentistry, UK
| | - P. Emery
- Leeds Musculoskeletal Biomedical Research Centre, University of Leeds, School of Medicine, UK
| | - D. Devine
- Division of Oral Biology, University of Leeds, School of Dentistry, UK
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14
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Hees A, Do T, Ghez AM, Martinez GD, Naoz S, Becklin EE, Boehle A, Chappell S, Chu D, Dehghanfar A, Kosmo K, Lu JR, Matthews K, Morris MR, Sakai S, Schödel R, Witzel G. Testing General Relativity with Stellar Orbits around the Supermassive Black Hole in Our Galactic Center. Phys Rev Lett 2017; 118:211101. [PMID: 28598651 DOI: 10.1103/physrevlett.118.211101] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Indexed: 06/07/2023]
Abstract
We demonstrate that short-period stars orbiting around the supermassive black hole in our Galactic center can successfully be used to probe the gravitational theory in a strong regime. We use 19 years of observations of the two best measured short-period stars orbiting our Galactic center to constrain a hypothetical fifth force that arises in various scenarios motivated by the development of a unification theory or in some models of dark matter and dark energy. No deviation from general relativity is reported and the fifth force strength is restricted to an upper 95% confidence limit of |α|<0.016 at a length scale of λ=150 astronomical units. We also derive a 95% confidence upper limit on a linear drift of the argument of periastron of the short-period star S0-2 of |ω[over ˙]_{S0-2}|<1.6×10^{-3} rad/yr, which can be used to constrain various gravitational and astrophysical theories. This analysis provides the first fully self-consistent test of the gravitational theory using orbital dynamic in a strong gravitational regime, that of a supermassive black hole. A sensitivity analysis for future measurements is also presented.
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Affiliation(s)
- A Hees
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - T Do
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - A M Ghez
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - G D Martinez
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - S Naoz
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - E E Becklin
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - A Boehle
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - S Chappell
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - D Chu
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - A Dehghanfar
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - K Kosmo
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - J R Lu
- Astronomy Department, University of California, Berkeley, California 94720, USA
| | - K Matthews
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, MC 301-17, Pasadena, California 91125, USA
| | - M R Morris
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - S Sakai
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - R Schödel
- Instituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía S/N, 18008 Granada, Spain
| | - G Witzel
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
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15
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Do T, Fard N, Vollherbst D, Schlett C, Gockner T, Flechsig P, Heim J, Pereira P, Macher-Göppinger S, Kauczor H, Sommer C. Kontrastmittel-verstärkter Ultraschall (CEUS) zur Beurteilung der Nierenmikrovaskularisation vor und nach Embolisation mit resorbierbaren experimentellen Stärkemikrosphären. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600493] [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: 10/19/2022]
Affiliation(s)
- T Do
- Universitätsklinikum Heidelberg, Diagnostische und interventionelle Radiologie, Heidelberg
| | - N Fard
- DKFZ, Radiologie, Heidelberg
| | - D Vollherbst
- Universitätsklinikum Heidelberg, Neuroradiologie, Heidelberg
| | - C Schlett
- Universitätsklinikum Heidelberg, Diagnostische und interventionelle Radiologie, Heidelberg
| | - T Gockner
- Universitätsklinikum Mainz, Diagnostische Radiologie, Mainz
| | - P Flechsig
- Universitätsklinikum Heidelberg, Nuklearmedizin, Heidelberg
| | - J Heim
- Universitätsklinikum Heidelberg, Diagnostische und interventionelle Radiologie, Heidelberg
| | - P Pereira
- SLK Kliniken Heilbronn, Klinik für Radiologie, minimalinvasive Therapien und Nuklearmedizin, Heilbronn
| | | | - H Kauczor
- Universitätsklinikum Heidelberg, Diagnostische und interventionelle Radiologie, Heidelberg
| | - C Sommer
- Universitätsklinikum Heidelberg, Diagnostische und interventionelle Radiologie, Heidelberg
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16
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Porat S, Goukasian N, Hwang KS, Zanto T, Do T, Pierce J, Joshi S, Woo E, Apostolova LG. Dance Experience and Associations with Cortical Gray Matter Thickness in the Aging Population. Dement Geriatr Cogn Dis Extra 2016; 6:508-517. [PMID: 27920794 PMCID: PMC5123027 DOI: 10.1159/000449130] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION We investigated the effect dance experience may have on cortical gray matter thickness and cognitive performance in elderly participants with and without mild cognitive impairment (MCI). METHODS 39 cognitively normal and 48 MCI elderly participants completed a questionnaire regarding their lifetime experience with music, dance, and song. Participants identified themselves as either dancers or nondancers. All participants received structural 1.5-tesla MRI scans and detailed clinical and neuropsychological evaluations. An advanced 3D cortical mapping technique was then applied to calculate cortical thickness. RESULTS Despite having a trend-level significantly thinner cortex, dancers performed better in cognitive tasks involving learning and memory, such as the California Verbal Learning Test-II (CVLT-II) short delay free recall (p = 0.004), the CVLT-II long delay free recall (p = 0.003), and the CVLT-II learning over trials 1-5 (p = 0.001). DISCUSSION Together, these results suggest that dance may result in an enhancement of cognitive reserve in aging, which may help avert or delay MCI.
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Affiliation(s)
- Shai Porat
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, Calif, USA
- Mary S. Easton Center for Alzheimer's Disease Research, Los Angeles, Calif, USA
| | - Naira Goukasian
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, Calif, USA
- Mary S. Easton Center for Alzheimer's Disease Research, Los Angeles, Calif, USA
| | - Kristy S. Hwang
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, Calif, USA
- Mary S. Easton Center for Alzheimer's Disease Research, Los Angeles, Calif, USA
- Oakland University William Beaumont School of Medicine, Rochester, Mich., USA
| | - Theodore Zanto
- Department of Neurology, UCSF, San Francisco, Calif, USA
| | - Triet Do
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, Calif, USA
- Mary S. Easton Center for Alzheimer's Disease Research, Los Angeles, Calif, USA
| | - Jonathan Pierce
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, Calif, USA
- Mary S. Easton Center for Alzheimer's Disease Research, Los Angeles, Calif, USA
| | - Shantanu Joshi
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, Calif, USA
| | - Ellen Woo
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, Calif, USA
- Mary S. Easton Center for Alzheimer's Disease Research, Los Angeles, Calif, USA
| | - Liana G. Apostolova
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, Calif, USA
- Mary S. Easton Center for Alzheimer's Disease Research, Los Angeles, Calif, USA
- Department of Neurology, Indiana University, Indianapolis, Ind, USA
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Sokolow S, Chen L, Do T, Li X, Taylor K, Rotter JI, Rissman RA, Aisen PS, Apostolova LG. P1‐052: Damaging Effect of the Butyrylcholinesterase K‐Variant in Donepezil Therapy of Mild Cognitive Impairment. Alzheimers Dement 2016. [DOI: 10.1016/j.jalz.2016.06.799] [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: 11/25/2022]
Affiliation(s)
- Sophie Sokolow
- UCLA School of NursingLos AngelesCA USA
- UCLA Brain Research InstituteLos AngelesCA USA
- UCLA Clinical and Translational Science InstituteLos AngelesCA USA
| | | | - Triet Do
- University of CaliforniaLos Angeles Los AngelesCA USA
| | - Xiaohui Li
- Division of Genomic Outcomes, Department of Pediatrics and Medicine Harbor-UCLA Medical CenterTorranceCA USA
- Institute for Translational Genomics and Population Sciences and Department of Pediatrics Los Angeles Biomedical Research InstituteTorranceCA USA
| | - Kent Taylor
- Division of Genomic Outcomes, Department of Pediatrics and Medicine Harbor-UCLA Medical CenterTorranceCA USA
- Institute for Translational Genomics and Population Sciences Department of Pediatrics Los Angeles Biomedical Research InstituteTorranceCA USA
| | - Jerome I. Rotter
- Division of Genomic Outcomes, Department of Pediatrics and Medicine Harbor-UCLA Medical CenterTorranceCA USA
- Institute for Translational Genomics and Population Sciences and Department of Pediatrics Los Angeles Biomedical Research InstituteTorranceCA USA
| | | | | | - Liana G. Apostolova
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
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Duran T, Risacher SL, Goukasian N, Do T, West JD, Nho K, Grotts J, Elashoff D, Saykin AJ, Apostolova LG. IC‐02‐01: The Effects of The Top 20 Alzheimer’s Disease Risk Genes on Brain Atrophy. Alzheimers Dement 2016. [DOI: 10.1016/j.jalz.2016.06.066] [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: 11/15/2022]
Affiliation(s)
- Tugce Duran
- Indiana University School of MedicineIndianapolisIN USA
| | | | | | - Triet Do
- University of California, Los AngelesLos AngelesCA USA
| | - John D. West
- Indiana University School of MedicineIndianapolisIN USA
| | - Kwangsik Nho
- Indiana University School of MedicineIndianapolisIN USA
| | | | | | | | - Liana G. Apostolova
- Indiana University School of MedicineIndianapolisIN USA
- University of California, Los AngelesLos AngelesCA USA
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Apostolova LG, Risacher SL, Duran T, Stage E, Goukasian N, West JD, Do T, Grotts J, Nho K, Elashoff D, Saykin AJ. O5‐01‐04: EXAMINING THE EFFECT OF THE TOP 20 ALZHEIMER'S DISEASE RISK VARIANTS ON BRAIN AMYLOIDOSIS, STRUCTURAL ATROPHY AND METABOLISM. Alzheimers Dement 2016. [DOI: 10.1016/j.jalz.2016.06.707] [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: 10/20/2022]
Affiliation(s)
| | | | - Tugce Duran
- Indiana University School of MedicineIndianapolisIN USA
| | - Eddie Stage
- Indiana University Medical SchoolIndianapolisIN USA
| | | | - John D. West
- Indiana University School of MedicineIndianapolisIN USA
| | - Triet Do
- University of California, Los AngelesLos AngelesCA USA
| | | | - Kwangsik Nho
- Indiana University School of MedicineIndianapolisIN USA
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20
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Goukasian N, Do T, Grotts J, Elashoff D, Risacher SL, Saykin AJ, Apostolova LG. O1‐13‐04: Effects of Cortical Amyloid b Deposition on the Incidence and Prevalence of Neuropsychiatric Behaviors in the Elderly. Alzheimers Dement 2016. [DOI: 10.1016/j.jalz.2016.06.326] [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: 10/20/2022]
Affiliation(s)
| | - Triet Do
- University of California, Los AngelesLos AngelesCA USA
| | | | | | | | | | - Liana G. Apostolova
- University of California, Los AngelesLos AngelesCA USA
- Indiana University School of MedicineIndianapolisIN USA
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21
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Stage E, Duran T, Risacher SL, Goukasian N, Do T, West JD, Nho K, Grotts J, Elashoff D, Saykin AJ, Apostolova LG. P1‐007: Association of FDG‐PET Brain Metabolism with Alzheimer’s Disease Risk Genes. Alzheimers Dement 2016. [DOI: 10.1016/j.jalz.2016.06.754] [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: 10/20/2022]
Affiliation(s)
- Eddie Stage
- Indiana University Medical SchoolIndianapolisIN USA
| | - Tugce Duran
- Indiana Alzheimer Disease CenterIndianapolisIN USA
- Indiana University School of MedicineIndianapolisIN USA
| | - Shannon L. Risacher
- Indiana Alzheimer Disease CenterIndianapolisIN USA
- Indiana University School of MedicineIndianapolisIN USA
| | | | - Triet Do
- University of CaliforniaLos Angeles Los AngelesCA USA
| | - John D. West
- Indiana Alzheimer Disease CenterIndianapolisIN USA
- Indiana University School of MedicineIndianapolisIN USA
| | - Kwangsik Nho
- Indiana University School of MedicineIndianapolisIN USA
| | | | | | - Andy J. Saykin
- Indiana Alzheimer Disease CenterIndianapolisIN USA
- Indiana University School of MedicineIndianapolisIN USA
- Indiana University Network ScienceIndianapolisIN USA
| | - Liana G. Apostolova
- Indiana Alzheimer Disease CenterIndianapolisIN USA
- Indiana University School of MedicineIndianapolisIN USA
- University of CaliforniaLos Angeles Los AngelesCA USA
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Mankia K, Hunt L, Hensor E, Nam J, Clerehugh V, Speirs A, Tugnait A, Do T, Devine D, Emery P. OP0246 Increased Prevalence of Periodontal Disease in Anti-CCP Positive Individuals at Risk of Progression To Inflammatory Arthritis: A Target for Prevention? Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.4128] [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: 11/04/2022]
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23
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Wang F, Calderone K, Smith N, Do T, Kang S, Voorhees J, Fisher G. 268 Enhanced dermal mechanical support rapidly stimulates fibroblasts and stable accumulation of collagen bundles in photoaged human skin. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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24
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Gopal S, Do T, Pooni JS, Martinelli G. Reply to authors--pitfalls in hemodynamic monitoring techniques: troubles in research or in clinical practice? Minerva Anestesiol 2015; 81:236-237. [PMID: 25338283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Affiliation(s)
- S Gopal
- Critical Care Services, Integrated Critical Care Unit, The Heart and Lung Centre, New Cross Hospital, Wolverhampton, -
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25
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Shumway D, Kapdia N, Do T, Griffith K, Feng M, Jagsi R, Helfrich Y, Liss A, Gillespie E, Miller A, Pierce L. Development of a Photonumeric Scale for Acute Radiation Dermatitis in Breast Cancer Patients. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.847] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Gopal S, Do T, Pooni JS, Martinelli G. Validation of cardiac output studies from the Mostcare compared to a pulmonary artery catheter in septic patients. Minerva Anestesiol 2014; 80:314-323. [PMID: 24398442] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND The Mostcare monitor is a non-invasive cardiac output monitor. It has been well validated in cardiac surgical patients but there is limited evidence on its use in patients with severe sepsis and septic shock. METHODS The study included the first 22 consecutive patients with severe sepsis and septic shock in whom the floatation of a pulmonary artery catheter was deemed necessary to guide clinical management. Cardiac output measurements including cardiac output, cardiac index and stroke volume were simultaneously calculated and recorded from a thermodilution pulmonary artery catheter and from the Mostcare monitor respectively. The two methods of measuring cardiac output were compared by Bland-Altman statistics and linear regression analysis. A percentage error of less than 30% was defined as acceptable for this study. RESULTS Bland-Altman analysis for cardiac output showed a Bias of 0.31 L.min-1, precision (=SD) of 1.97 L.min-1 and a percentage error of 62.54%. For Cardiac Index the bias was 0.21 L.min-1.m-2, precision of 1.10 L.min-1.m-2 and a percentage error of 64%. For stroke volume the bias was 5 mL, precision of 24.46 mL and percentage error of 70.21%. Linear regression produced a correlation coefficient r2 for cardiac output, cardiac index, and stroke volume, of 0.403, 0.306, and 0.3 respectively. CONCLUSION Compared to thermodilution cardiac output, cardiac output studies obtained from the Mostcare monitor have an unacceptably high error rate. The Mostcare monitor demonstrated to be an unreliable monitoring device to measure cardiac output in patients with severe sepsis and septic shock on an intensive care unit.
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Affiliation(s)
- S Gopal
- Critical Care Services, Heart and Lung Centre, New Cross Hospital, Wolverhampton, UK -
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27
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Niazi SA, Clark D, Do T, Gilbert SC, Foschi F, Mannocci F, Beighton D. The effectiveness of enzymic irrigation in removing a nutrient-stressed endodontic multispecies biofilm. Int Endod J 2014; 47:756-68. [DOI: 10.1111/iej.12214] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Accepted: 11/13/2013] [Indexed: 11/29/2022]
Affiliation(s)
- S. A. Niazi
- Department of Restorative Dentistry; King's College London; London UK
- Department of Microbiology; Dental Institute; King's College London; London UK
| | - D. Clark
- Department of Microbiology; Dental Institute; King's College London; London UK
| | - T. Do
- Department of Microbiology; Dental Institute; King's College London; London UK
| | - S. C. Gilbert
- Department of Microbiology; Dental Institute; King's College London; London UK
| | - F. Foschi
- Department of Restorative Dentistry; King's College London; London UK
| | - F. Mannocci
- Department of Restorative Dentistry; King's College London; London UK
| | - D. Beighton
- Department of Microbiology; Dental Institute; King's College London; London UK
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Gopal S, Pooni J, Do T, Karimi A, Martinelli G. Validation of cardiac output from Mostcare compared with a pulmonary artery catheter in septic patients. Crit Care 2014. [PMCID: PMC4068186 DOI: 10.1186/cc13330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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29
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Meyer L, Ghez AM, Schödel R, Yelda S, Boehle A, Lu JR, Do T, Morris MR, Becklin EE, Matthews K. The Shortest-Known–Period Star Orbiting Our Galaxy’s Supermassive Black Hole. Science 2012; 338:84-7. [PMID: 23042888 DOI: 10.1126/science.1225506] [Citation(s) in RCA: 165] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- L. Meyer
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095-1547, USA
| | - A. M. Ghez
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095-1547, USA
| | - R. Schödel
- Instituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomia S/N, 18008 Granada, Spain
| | - S. Yelda
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095-1547, USA
| | - A. Boehle
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095-1547, USA
| | - J. R. Lu
- Institute for Astronomy, University of Hawaii, Honolulu, HI 96822, USA
| | - T. Do
- Department of Physics and Astronomy, University of California Irvine, Irvine, CA 92697-4575, USA
- Dunlap Institute for Astronomy and Astrophysics, University of Toronto, Toronto M5S 3H4, Ontario, Canada
| | - M. R. Morris
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095-1547, USA
| | - E. E. Becklin
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095-1547, USA
| | - K. Matthews
- Division of Mathematics, Physics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
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Dave N, Do T, Palfreyman D, Feron P. Impact of liquid absorption process development on the costs of post-combustion capture in Australian coal-fired power stations. Chem Eng Res Des 2011. [DOI: 10.1016/j.cherd.2010.09.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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31
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Do T, Gilbert S, Klein J, Warren S, Wade W, Beighton D. Clonal structure of Streptococcus sanguinis strains isolated from endocarditis cases and the oral cavity. Mol Oral Microbiol 2011; 26:291-302. [DOI: 10.1111/j.2041-1014.2011.00618.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Parolo C, Do T, Henssge U, Alves L, de Santana Giongo F, Corção G, Maltz M, Beighton D. Genetic diversity of Lactobacillus paracasei isolated from in situ human oral biofilms. J Appl Microbiol 2011; 111:105-13. [DOI: 10.1111/j.1365-2672.2011.05041.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [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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Dave N, Do T, Palfreyman D, Feron P. Impact of post combustion capture of CO2 on existing and new Australian coal-fired power plants. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.egypro.2011.02.082] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Vaughan A, Singh S, Shih S, Do T. Therapy Related Leukemia: Separation of Toxicity from Leukemogenesis. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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Pardo A, Do T, Ryder T, Schaeffer C, McMahon M, Wong B. P4.14 Combination of steroids and ischial weight-bearing KAFOs in DMD prolongs ambulation past 20 years of age — A case report. Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.210] [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]
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Shafey M, Stewart D, Do T, Lupichuk S. Preference Of Patients And Physicians Concerning Treatment Options For Relapsed Follicular Lymphoma: A Discrete Choice Experiment. Biol Blood Marrow Transplant 2010. [DOI: 10.1016/j.bbmt.2009.12.255] [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: 11/15/2022]
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Nguyen D, Vu L, Vu T, Nguyen A, Nguyen C, Vu P, Nguyen H, Nguyen H, Do T, Tran L. UP-2.147: Preoperative Assessment and Postoperative Evaluation of Prostate Cancer After Radical Prostatectomy. Urology 2009. [DOI: 10.1016/j.urology.2009.07.366] [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: 10/20/2022]
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Le Tourneau C, Duran I, Chen E, Wang L, Tsao M, Hedley D, Phan N, Do T, Metser U, Siu L. 410 POSTER Phase I pharmacodynamic (PD) and pharmacokinetic (PK) analysis of the sorafenib (S) and erlotinib (E) combination in patients with advanced solid tumors. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)72344-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Beighton D, Clark D, Hanakuka B, Gilbert S, Do T. The predominant cultivable Veillonella spp. of the tongue of healthy adults identified using rpoB sequencing. ACTA ACUST UNITED AC 2008; 23:344-7. [DOI: 10.1111/j.1399-302x.2007.00424.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Detailed data on the distribution of Veillonella in caries-free and caries-active subjects are scarce. We hypothesized that the diversity of the genus would be lower in caries lesions than in plaque from caries-free individuals. The proportions of Veillonella were not significantly different in the two groups. All isolates (n = 1308) were genotyped by REP-PCR, and different genotypes (n = 170) were identified by 16S rRNA, dnaK, and rpoB sequencing. V. parvula, V. dispar, and V. atypica were in both groups, V. denticariosi only in caries lesions, and V. rogosae only from the caries-free individuals (p < 0.009). Lesions were more likely to harbor a single predominant species (p = 0.0018). The mean number of genotypes in the lesions was less than in the fissure (p < 0.001) or buccal (p = 0.011) sites. The Veillonella from caries-free sites were more diverse than those from caries lesions, and may be related to the acidic environment of caries lesions.
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Affiliation(s)
- N Arif
- King's College London Dental Institute, Infection Research Group, Floor 17, Guy's Tower, Guy's Campus, London SE1 9RT, UK
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Bradbury B, Do T, Rothman K, Critchlow C, Collins A, Brookhart M, Krishnan M, Acquavella J. 34: Adjustment for Exposure History and Important Confounders Markedly Attenuates Elevated Mortality Risk Associated with Epoetin Alfa (EPO) Dose. Am J Kidney Dis 2008. [DOI: 10.1053/j.ajkd.2008.02.039] [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: 11/11/2022]
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Phan T, Meng A, Do T, Nicklee T, Ho J, Cole H, Sweet J, Hedley D, Bristow R. 85. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.115] [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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Do T, Stephens C, Townsend K, Wu X, Chapman T, Chin J, McCormick B, Bara M, Trott DJ. Rapid identification of virulence genes in enterotoxigenic Escherichia coli isolates associated with diarrhoea in Queensland piggeries. Aust Vet J 2005; 83:293-9. [PMID: 15957392 DOI: 10.1111/j.1751-0813.2005.tb12745.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To identify virulence genes in enterotoxigenic E coli (ETEC) isolates associated with diarrhoea in neonatal, 1 to 3 week-old and weaned pigs in southeast Queensland. DESIGN Multiplex PCR and serotyping were applied to E coli isolates obtained over a 5-year period (1998-2002) from cases diagnosed at Toowoomba Veterinary Laboratory. PROCEDURE A total of 126 isolates from 25 different Queensland piggeries were tested for haemolytic activity on 5% sheep blood agar and by multiplex PCR for the presence of five commonly recognised fimbrial (F4, F5, F6, F41 and F18) and three enterotoxin genes (STa, STb, LT). A subset of 62 representative isolates were serotyped by slide agglutination. For comparative purposes, multiplex PCR was also performed on the DNA of 31 ETEC isolates from 9 serotypes originating from piggeries in southern New South Wales. RESULTS A total of 113 (89.7%) of the isolates from Queensland possessed ETEC virulence genes, including 14 of 15 isolates from neonatal pigs (93.3%), 18 of 23 isolates from 1 to 3 week old pigs (78.3%) and 81 of 88 isolates from weaned pigs (92.1%). F4:STa:STb:LT (serotype O149) was the most prevalent pathotype in neonatal and 1-3 week old pigs and F4:STa:STb:LT (serotype O149) and F18:STa:STb:LT (serotype O141) were most prevalent in weaned pigs. In comparison, isolates obtained from neonatal pigs from New South Wales belonged to a more diverse range of pathotypes and serotypes. CONCLUSION Multiplex PCR was a rapid and specific method for detecting the presence of ETEC virulence genes in porcine E coli isolates. For isolates obtained from cases of suspected colibacillosis in Queensland, growth of a heavy pure culture of haemolytic E coli was a sensitive prognostic indicator of the presence of ETEC virulence genes in the isolate. ETEC pathotypes and serotypes remained stable in Queensland piggeries over the five-year study period and appear to have changed little over the last three decades.
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Affiliation(s)
- T Do
- School of Veterinary Science, The University of Queensland, Brisbane, Queensland 4072
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Hamata L, Hsieh T, de Lemos M, Levin A, Swenerton K, Vu T, Hu F, Conklin J, Taylor S, Do T. Evaluation of Cockcroft-Gault (CG) and abbreviated Modified Diet in Renal Disease Study (MDRD) formulas for carboplatin dosing in gynecological malignancies. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.2078] [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)
- L. Hamata
- British Columbia Cancer Agency, Vancouver, BC, Canada; Univ of British Columbia, Vancouver, BC, Canada; British Columbia Provincial Renal Agency, Vancouver, BC, Canada
| | - T. Hsieh
- British Columbia Cancer Agency, Vancouver, BC, Canada; Univ of British Columbia, Vancouver, BC, Canada; British Columbia Provincial Renal Agency, Vancouver, BC, Canada
| | - M. de Lemos
- British Columbia Cancer Agency, Vancouver, BC, Canada; Univ of British Columbia, Vancouver, BC, Canada; British Columbia Provincial Renal Agency, Vancouver, BC, Canada
| | - A. Levin
- British Columbia Cancer Agency, Vancouver, BC, Canada; Univ of British Columbia, Vancouver, BC, Canada; British Columbia Provincial Renal Agency, Vancouver, BC, Canada
| | - K. Swenerton
- British Columbia Cancer Agency, Vancouver, BC, Canada; Univ of British Columbia, Vancouver, BC, Canada; British Columbia Provincial Renal Agency, Vancouver, BC, Canada
| | - T. Vu
- British Columbia Cancer Agency, Vancouver, BC, Canada; Univ of British Columbia, Vancouver, BC, Canada; British Columbia Provincial Renal Agency, Vancouver, BC, Canada
| | - F. Hu
- British Columbia Cancer Agency, Vancouver, BC, Canada; Univ of British Columbia, Vancouver, BC, Canada; British Columbia Provincial Renal Agency, Vancouver, BC, Canada
| | - J. Conklin
- British Columbia Cancer Agency, Vancouver, BC, Canada; Univ of British Columbia, Vancouver, BC, Canada; British Columbia Provincial Renal Agency, Vancouver, BC, Canada
| | - S. Taylor
- British Columbia Cancer Agency, Vancouver, BC, Canada; Univ of British Columbia, Vancouver, BC, Canada; British Columbia Provincial Renal Agency, Vancouver, BC, Canada
| | - T. Do
- British Columbia Cancer Agency, Vancouver, BC, Canada; Univ of British Columbia, Vancouver, BC, Canada; British Columbia Provincial Renal Agency, Vancouver, BC, Canada
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Do T, McIntyre NS. Effects of temperature and Ar+ ion bombardment on the initial oxidation stages of polycrystalline aluminium with water vapour. SURF INTERFACE ANAL 2001. [DOI: 10.1002/sia.1143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kanovsky M, Raffo A, Drew L, Rosal R, Do T, Friedman FK, Rubinstein P, Visser J, Robinson R, Brandt-Rauf PW, Michl J, Fine RL, Pincus MR. Peptides from the amino terminal mdm-2-binding domain of p53, designed from conformational analysis, are selectively cytotoxic to transformed cells. Proc Natl Acad Sci U S A 2001; 98:12438-43. [PMID: 11606716 PMCID: PMC60072 DOI: 10.1073/pnas.211280698] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2001] [Indexed: 02/07/2023] Open
Abstract
We have synthesized three peptides from the mdm-2 binding domain of human p53, residues 12-26 (PPLSQETFSDLWKLL), residues 12-20, and 17-26. To enable transport of the peptides across the cell membrane and at the same time to maximize the active mdm-2 binding alpha-helical conformation for these peptides, each was attached at its carboxyl terminus to the penetratin sequence, KKWKMRRNQFWVKVQRG, that contains many positively charged residues that stabilize an alpha-helix when present on its carboxyl terminal end. All three peptides were cytotoxic to human cancer cells in culture, whereas a control, unrelated peptide attached to the same penetratin sequence had no effect on these cell lines. The same three cytotoxic peptides had no effect on the growth of normal cells, including human cord blood-derived stem cells. These peptides were as effective in causing cell death in p53-null cancer cells as in those having mutant or normal p53. Peptide-induced cell death is not accompanied by expression of apoptosis-associated proteins such as Bax and waf(p21). Based on these findings, we conclude that the antiproliferative effects of these p53-derived peptides are not completely dependent on p53 activity and may prove useful as general anticancer agents.
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Affiliation(s)
- M Kanovsky
- Department of Pathology and Laboratory Medicine, Harbor Veterans Affairs Medical Center, 800 Poly Place, Brooklyn, NY 11209, USA
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Ji W, Chen F, Do T, Do A, Roe BA, Meisler MH. DQX1, an RNA-dependent ATPase homolog with a novel DEAQ box: expression pattern and genomic sequence comparison of the human and mouse genes. Mamm Genome 2001; 12:456-61. [PMID: 11353393 DOI: 10.1007/s003350020032] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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: 12/19/2000] [Accepted: 01/26/2001] [Indexed: 10/28/2022]
Abstract
DQX1 is a novel gene related to the RNA-dependent ATPases. The gene was classified as a member of the DEAD/H family on the basis of the conserved order and spacing of ten short protein motifs. The unique features of DQX1 include replacement of the signature DEAH motif with DEAQ and the absence of the helicase motif. We determined the coding sequences of human and mouse DQX1, which encode proteins of 717 and 718 amino acids with 84% amino acid sequence identity. The 3.2-kb Dqx1 transcript has highest expression in muscle and liver. DQX1 is located between AUP1 and HOX11L1 in a gene-dense region of human Chromosome (Chr) 2p13 and mouse Chr 6. Although DQX1 is within the nonrecombinant region for the mouse neuromuscular mutant mnd2, no difference in coding sequence, transcript length, or transcript abundance was observed between normal mice and mnd2 mutant mice. The ubiquitous expression of DQX1 and its close phylogenetic relationship to the yeast pre-mRNA processing (Prp) proteins suggest a role in cellular RNA metabolism.
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Affiliation(s)
- W Ji
- Department of Human Genetics, 4909 Buhl, Box 0618, University of Michigan, Ann Arbor, Michigan 48109-0618, USA
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Do T, Dave G, Parker R, Kagan AR. Serum PSA evaluations during salvage radiotherapy for post-prostatectomy biochemical failures as prognosticators for treatment outcomes. Int J Radiat Oncol Biol Phys 2001; 50:1220-5. [PMID: 11483332 DOI: 10.1016/s0360-3016(01)01558-9] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
INTRODUCTION Serum prostate specific antigen (PSA) levels have proved to be sensitive markers for the diagnosis of prostate cancer. In addition, PSA levels are useful for detecting and monitoring prostate cancer progression after radiotherapy. Serum PSA evaluations during radiotherapy, however, have not been well documented. In this study, we investigate the prognostic value of PSA evaluations during salvage radiotherapy for prostatectomy failures. METHODS Forty-one patients with biochemical failures after prostatectomy treated with salvage radiotherapy consented to have their serum PSA levels evaluated at 30 Gy and 45 Gy of irradiation. All 41 patients had negative metastatic workup and pathologically uninvolved pelvic lymph nodes at the time of referral for salvage radiotherapy. Radiation therapy was delivered with 10--25 MV photons, with doses of 59.4--66.6 Gy. No patients received hormonal ablation therapy before irradiation. RESULTS The mean follow-up for all patients was 30.9 months. At last follow-up, 28/41 patients (68.3%) were free from biochemical failure, with 20 of 41 patients (48.8%) expressing undetectable PSA levels. Serum PSA evaluations at 30 Gy did not significantly predict for either biochemical (p = 0.0917) or clinical (p = 0.106) disease-free outcome. However, serum PSA evaluations at 45 Gy significantly predicted for both biochemical (p = 0.0043) and clinical (p = 0.0244) disease-free outcomes, with PSA elevations at 45 Gy significantly associated with poor outcomes. On univariate analysis of prognosticators for biochemical failures, the following were significant: an elevation in serum PSA levels at 45 Gy, detectable serum PSA immediately after prostatectomy, Gleason score 7--10, and serum PSA level >1 ng/ml before salvage radiotherapy. CONCLUSION Evaluation of serum PSA level at 45 Gy of salvage radiotherapy for biochemical relapses after prostatectomy may serve as a significant prognosticator for both biochemical and clinical disease-free outcomes.
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Affiliation(s)
- T Do
- Department of Radiation Oncology, UCLA Medical Center, Los Angeles, CA, USA
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Do T, Fras C, Burke S, Widmann RF, Rawlins B, Boachie-Adjei O. Clinical value of routine preoperative magnetic resonance imaging in adolescent idiopathic scoliosis. A prospective study of three hundred and twenty-seven patients. J Bone Joint Surg Am 2001; 83:577-9. [PMID: 11315788 DOI: 10.2106/00004623-200104000-00014] [Citation(s) in RCA: 81] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND The prevalence of intraspinal pathology associated with scoliosis has been reported to be as high as 26% in some series, and, on the basis of this finding, preoperative magnetic resonance imaging is used in the screening of patients with adolescent idiopathic scoliosis. However, this practice continues to be highly controversial. In order to better resolve this issue, we performed what we believe to be the largest prospective study to evaluate the need for preoperative magnetic resonance imaging in patients with adolescent idiopathic scoliosis requiring arthrodesis of the spine. METHODS A total of 327 consecutive patients with adolescent idiopathic scoliosis were evaluated between December 1991 and March 1999. All patients in the study presented with an adolescent idiopathic scoliosis curve pattern and had a complete physical and neurologic examination. Magnetic resonance imaging of the brain and the spinal cord were performed as part of their preoperative work-up. RESULTS Seven patients had an abnormality noted on magnetic resonance imaging. These abnormalities included a spinal cord syrinx in two patients (0.6%) and an Arnold-Chiari type-I malformation in four (1.2%). One patient had an abnormal fatty infiltration of the tenth thoracic vertebral body. No patient required neurosurgical intervention or additional work-up. All patients who underwent spinal arthrodesis with segmental instrumentation tolerated the surgery without any immediate or delayed neurologic sequelae. CONCLUSIONS The fact that magnetic resonance imaging did not detect any important pathology in the large number of patients in this study strongly suggests that magnetic resonance imaging is not indicated prior to arthrodesis of the spine in patients with an adolescent idiopathic scoliosis curve pattern and a normal physical and neurologic examination.
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Affiliation(s)
- T Do
- The Hospital for Special Surgery, New York, NY 10021, USA
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