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Si C, Nickerson K, Simmons T, Denton P, Nichols MR, Dysko RC, Hoenerhoff M, Mani R, Woods C, Henderson KS, Freeman ZT. Next-Generation Sequencing-Based Identification of Enterobacter hormaechei as Causative Agent of High Mortality Disease in NOD.Cg- PrkdcscidIl2rgtm1Wjl/SzJ (NSG) Mice. Toxicol Pathol 2024; 52:67-80. [PMID: 38477038 DOI: 10.1177/01926233241231286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
NOD.Cg-PrkdcscidIl2rgtm1Wjl/SzJ (NSG) mice, lacking many components of a mature immune system, are at increased risk of disease. General understanding of potential pathogens of these mice is limited. We describe a high mortality disease outbreak caused by an opportunistic bacterial infection in NSG mice. Affected animals exhibited perianal fecal staining, dehydration, and wasting. Histopathologic lesions included a primary necrotizing enterocolitis, with inflammatory and necrotizing lesions also occurring in the liver, kidneys, heart, and brain of some mice. All affected individuals tested negative for known opportunistic pathogens of immunodeficient mice. We initially identified a member of Enterobacter cloacae complex (ECC) in association with the outbreak by traditional diagnostics. ECC was cultured from extraintestinal organs, both with and without histopathologic lesions, suggesting bacteremia. Infrared spectroscopy and MALDI-TOF mass spectrometry demonstrated that isolates from the outbreak shared molecular features and likely a common origin. We subsequently hypothesized that advanced sequencing methods would identify a single species of ECC associated with clinical disease. Using a novel targeted amplicon-based next-generation sequencing assay, we identified Enterobacter hormaechei in association with this outbreak. Knowledge of this organism as a potential opportunistic pathogen in NSG mice is critical for preclinical studies to prevent loss of animals and confounding of research.
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Affiliation(s)
- Catherine Si
- University of Michigan, Ann Arbor, Michigan, USA
| | | | | | | | | | | | | | - Rinosh Mani
- Michigan State University, East Lansing, Michigan, USA
| | - Cheryl Woods
- Charles River Laboratories, Wilmington, Massachusetts, USA
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Alcantara M, Acosta P, Azatian A, Calderon C, Candray K, Castillo N, Coria-Gomez L, Duran J, Fam J, Hernandez-Segura D, Hidalgo L, Huerta C, Jordan S, Kagan K, Loya K, Martinez E, Musaev K, Navarro R, Nazarians N, Paglia R, Robles G, Simmons T, Smith S, Soudani F, Valenzuela E, Villalobos J, Iftikhar H, Hanzawa Y. Experimental Verification of Inferred Regulatory Interactions of EARLY FLOWERING 3 ( GmELF3-1 ) in Glycine max. MicroPubl Biol 2022; 2022:10.17912/micropub.biology.000687. [PMID: 36506349 PMCID: PMC9729981 DOI: 10.17912/micropub.biology.000687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 10/28/2022] [Accepted: 11/18/2022] [Indexed: 12/15/2022]
Abstract
Understanding the roles of evening complex (EC) genes in the circadian clock of plants can inform how diurnal transcriptional loops in the clock gene network function to regulate key physiological and developmental events, including flowering transition. Gene regulatory interactions among soybean's circadian clock and flowering genes were inferred using time-series RNA-seq data and the network inference algorithmic package CausNet. In this study, we seek to clarify the inferred regulatory interactions of the EC gene GmELF3-1. A gene expression analysis using soybean protoplasts as a transient model indicated regulatory roles of GmELF3-1 in expression of selected flowering genes.
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Affiliation(s)
| | - Patrick Acosta
- Department of Biology, California State University Northridge
| | - Ara Azatian
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Carlos Calderon
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Kevin Candray
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Natalie Castillo
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Luis Coria-Gomez
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Jose Duran
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Justina Fam
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Diego Hernandez-Segura
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Lennix Hidalgo
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Carlos Huerta
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Shane Jordan
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Kimberly Kagan
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Karla Loya
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Eduardo Martinez
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Kirill Musaev
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Roxana Navarro
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Narek Nazarians
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Robert Paglia
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Gabriela Robles
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Taylor Simmons
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Shawn Smith
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Faisel Soudani
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Emily Valenzuela
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Jessica Villalobos
- Department of Biology, BIOL 481 Plant Physiology, California State University Northridge
| | - Hira Iftikhar
- Department of Biology, California State University Northridge
| | - Yoshie Hanzawa
- Department of Biology, California State University Northridge
,
Correspondence to: Yoshie Hanzawa (
)
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3
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Gushchina L, Bradley A, Vetter T, Frair E, Bellinger C, Simmons T, Rohan N, Wein N, Flanigan K. DMD - TREATMENT. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.171] [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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4
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West N, Pearson R, Hashmi A, Jiang X, Ogilvie A, Simmons T. PO-1250: Palliation of vertebral metastases and cord compressions: single field or VMAT? Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)01268-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Gushchina L, Frair E, Rohan N, Bradley A, Simmons T, Chavan H, Waldrop M, Wein N, Flanigan K. DMD – ANIMAL MODELS & PRECLINICAL TREATMENT. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Wein N, Simmons T, Rajakumar D, Lesman D, Li D, Gaffney C, Rafferty R, Huang N, Rodriguez Y, Young C, Spencer M, Flanigan K. DMD – ANIMAL MODELS & PRECLINICAL TREATMENT. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Brennan RB, Murnane JG, Sharpley AN, Herron S, Brye KR, Simmons T. Soil phosphorus dynamics following land application of unsaturated and partially saturated red mud and water treatment residuals. J Environ Manage 2019; 248:109296. [PMID: 31376614 DOI: 10.1016/j.jenvman.2019.109296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 06/25/2019] [Accepted: 07/18/2019] [Indexed: 06/10/2023]
Abstract
The secondary use of P-sorbing industrial by-products as a fertilizer or soil conditioner is gaining increased attention, particularly in light of diminishing reserves of rock phosphate traditionally used to manufacture P fertilizer. This study examined applications of red mud (RM) and water treatment residuals (WTR) at two levels of P saturation (i.e. 'as received' and partially saturated) in a soil incubation and runoff plot study. When incubated with soils ranging in texture and initial P concentration, P-sorbing residuals that were less enriched with P decreased water-extractable soil P (WEP) concentration to a greater extent than more P saturated residuals. In contrast to WTR treatments, not all of the RM applications decreased soil WEP concentrations below those of the control soils. The runoff study investigated soil P dynamics when partially P-saturated RM and WTR's were surface applied to grass plots at 2 t ha-1 on Day 0, followed by three rainfall simulations (7 cm h-1 for 30 min, Days 2, 7 and 28) and at 3 t ha-1 on Day 70 followed by two more rainfall simulations (Days 77 and 96). Application of residuals at these rates did not significantly increase dissolved reactive P (DRP) in runoff compared with unamended controls during the study. Forage cuttings taken 90 days after the first rainfall simulation indicated that nutrient uptake was not compromised by the application of the residuals. Overall results indicate that WTRs may be a more suitable soil amendment than RM residuals given their greater ability to reduce soil WEP across a range of soils without simultaneously increasing Mehlich-3 extractable soil P concentrations above the upper threshold limit (150 mg P kg-1), and their minimal impact on plant nutrient uptake.
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Affiliation(s)
- R B Brennan
- Dept. Crop, Soil, and Environmental Sciences, Division of Agriculture, University of Arkansas, Fayetteville, AR, USA; Civil Engineering, National University of Ireland, Galway, Ireland
| | - J G Murnane
- School of Engineering, University of Limerick, Ireland.
| | - A N Sharpley
- Dept. Crop, Soil, and Environmental Sciences, Division of Agriculture, University of Arkansas, Fayetteville, AR, USA
| | - S Herron
- Dept. Crop, Soil, and Environmental Sciences, Division of Agriculture, University of Arkansas, Fayetteville, AR, USA
| | - K R Brye
- Dept. Crop, Soil, and Environmental Sciences, Division of Agriculture, University of Arkansas, Fayetteville, AR, USA
| | - T Simmons
- Dept. Crop, Soil, and Environmental Sciences, Division of Agriculture, University of Arkansas, Fayetteville, AR, USA
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Gushchina L, Grounds K, Huang H, Frair E, Schnell F, Hanson G, Simmons T, Wein N, Flanigan K. P.141PPMO-mediated skipping therapy of duplicated exon 2 in the DMD gene. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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9
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Flanigan K, Chicoine L, Cheatham J, Cheatham S, Simmons T, Lowes L, Iammarino M, Miller N, Alfano L, Rinaldi F, Waldrop M, Zygmunt D, Xu R, Martin P. DMD CLINICAL THERAPIES II. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.159] [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: 10/28/2022]
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10
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Iqbal M, Vashisht G, Mulvenna P, McDonald F, Turnbull H, Atherton P, Bradshaw A, Simmons T, Kovarik J, Singhal S, McMenemin R, Greystoke A. Hypofractionated concurrent chemoradiation in non-small cell lung cancer (NSCLC): efficacy and toxicity of the SOCCAR trial regime in real world practice. Lung Cancer 2018. [DOI: 10.1016/s0169-5002(18)30175-2] [Citation(s) in RCA: 1] [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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11
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Winn E, Hughes A, Gardiner J, Simmons T, McMenemin R, Greystoke A. A single centre audit of the use of pembrolizumab immunotherapy in patients with advanced NSCLC. Lung Cancer 2018. [DOI: 10.1016/s0169-5002(18)30115-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Wein N, Simmons T, Gumienny F, Huang N, Heller K, Yurkoski J, Rodino-Klapac L, Muntoni F, Flanigan K. A single neonatal injection of an AAV9.U7snRNA virus mediating skipping of dmd exon 2 allows dystrophin expression preventing apparition of pathologic features in the Dup2 mouse one year post injection. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.339] [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: 10/18/2022]
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13
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Grossman RL, Abel B, Angiuoli S, Barrett JC, Bassett D, Bramlett K, Blumenthal GM, Carlsson A, Cortese R, DiGiovanna J, Davis-Dusenbery B, Dittamore R, Eberhard DA, Febbo P, Fitzsimons M, Flamig Z, Godsey J, Goswami J, Gruen A, Ortuño F, Han J, Hayes D, Hicks J, Holloway D, Hovelson D, Johnson J, Juhl H, Kalamegham R, Kamal R, Kang Q, Kelloff GJ, Klozenbuecher M, Kolatkar A, Kuhn P, Langone K, Leary R, Loverso P, Manmathan H, Martin AM, Martini J, Miller D, Mitchell M, Morgan T, Mulpuri R, Nguyen T, Otto G, Pathak A, Peters E, Philip R, Posadas E, Reese D, Reese MG, Robinson D, Dei Rossi A, Sakul H, Schageman J, Singh S, Scher HI, Schmitt K, Silvestro A, Simmons J, Simmons T, Sislow J, Talasaz A, Tang P, Tewari M, Tomlins S, Toukhy H, Tseng HR, Tuck M, Tzou A, Vinson J, Wang Y, Wells W, Welsh A, Wilbanks J, Wolf J, Young L, Lee J, Leiman LC. Collaborating to Compete: Blood Profiling Atlas in Cancer (BloodPAC) Consortium. Clin Pharmacol Ther 2017; 101:589-592. [PMID: 28187516 PMCID: PMC5525192 DOI: 10.1002/cpt.666] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 02/08/2017] [Accepted: 02/08/2017] [Indexed: 01/02/2023]
Abstract
The cancer community understands the value of blood profiling measurements in assessing and monitoring cancer. We describe an effort among academic, government, biotechnology, diagnostic, and pharmaceutical companies called the Blood Profiling Atlas in Cancer (BloodPAC) Project. BloodPAC will aggregate, make freely available, and harmonize for further analyses, raw datasets, relevant associated clinical data (e.g., clinical diagnosis, treatment history, and outcomes), and sample preparation and handling protocols to accelerate the development of blood profiling assays.
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Affiliation(s)
- R L Grossman
- Center for Data Intensive Science, University of Chicago, Chicago, Illinois, USA
| | - B Abel
- Genomic Health, Redwood City, California, USA
| | - S Angiuoli
- Personal Genome Diagnostics, Baltimore, Maryland, USA
| | | | | | - K Bramlett
- Thermo Fisher Scientific, Austin, Texas, USA
| | - G M Blumenthal
- Center for Drug Evaluation and Research, Food and Drug Administration, Silver Springs, Maryland, USA
| | - A Carlsson
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging, University of California, Los Angeles, California, USA
| | - R Cortese
- Seven Bridges, Cambridge, Massachusetts, USA
| | | | | | - R Dittamore
- Epic Research and Diagnostics, San Diego, California, USA
| | | | - P Febbo
- Genomic Health, Redwood City, California, USA
| | - M Fitzsimons
- Center for Data Intensive Science, University of Chicago, Chicago, Illinois, USA
| | - Z Flamig
- Center for Data Intensive Science, University of Chicago, Chicago, Illinois, USA
| | - J Godsey
- Thermo Fisher Scientific, Waltham, Massachusetts, USA
| | - J Goswami
- Thermo Fisher Scientific, Carlsbad, California, USA
| | - A Gruen
- Seven Bridges, Cambridge, Massachusetts, USA
| | - F Ortuño
- Center for Data Intensive Science, University of Chicago, Chicago, Illinois, USA
| | - J Han
- Genomic Health, Redwood City, California, USA
| | - D Hayes
- University of Michigan, Ann Arbor, Michigan, USA
| | - J Hicks
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging, University of California, Los Angeles, California, USA
| | - D Holloway
- Seven Bridges, Cambridge, Massachusetts, USA
| | - D Hovelson
- University of Michigan, Ann Arbor, Michigan, USA
| | - J Johnson
- AstraZeneca, Waltham, Massachusetts, USA
| | - H Juhl
- Indivumed GmbH, Hamburg, Germany
| | - R Kalamegham
- Genentech, Washington, District of Columbia, USA
| | - R Kamal
- Omicia, Oakland, California, USA
| | - Q Kang
- University of Michigan, Ann Arbor, Michigan, USA
| | - G J Kelloff
- Office of the Director, National Cancer Institute, Bethesda, Maryland, USA
| | | | - A Kolatkar
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging, University of California, Los Angeles, California, USA
| | - P Kuhn
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging, University of California, Los Angeles, California, USA
| | - K Langone
- Genomic Health, Redwood City, California, USA
| | - R Leary
- Novartis Institute for Biomedical Research, Cambridge, Massachusetts, USA
| | - P Loverso
- Personal Genome Diagnostics, Baltimore, Maryland, USA
| | - H Manmathan
- Seven Bridges, Cambridge, Massachusetts, USA
| | - A-M Martin
- Novartis Pharmaceuticals, East Hanover, New Jersey, USA
| | | | - D Miller
- Center for Data Intensive Science, University of Chicago, Chicago, Illinois, USA
| | - M Mitchell
- Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - T Morgan
- University of Michigan, Ann Arbor, Michigan, USA
| | - R Mulpuri
- Provista Diagnostics Inc., New York, New York, USA
| | - T Nguyen
- Center for Data Intensive Science, University of Chicago, Chicago, Illinois, USA
| | - G Otto
- Foundation Medicine, Cambridge, Massachusetts, USA
| | - A Pathak
- Center for Device and Radiological Health, Food and Drug Administration, Silver Springs, Maryland, USA
| | - E Peters
- Genentech, South San Francisco, California, USA
| | - R Philip
- Center for Device and Radiological Health, Food and Drug Administration, Silver Springs, Maryland, USA
| | - E Posadas
- CytoLumina, Inc., Los Angeles, California, USA.,Cedar-Sinai Medical Center, Los Angeles, California, USA
| | - D Reese
- Provista Diagnostics Inc., New York, New York, USA
| | | | - D Robinson
- Novartis Institute for Biomedical Research, Cambridge, Massachusetts, USA
| | - A Dei Rossi
- Genomic Health, Redwood City, California, USA
| | - H Sakul
- Pfizer, San Diego, California, USA
| | - J Schageman
- Thermo Fisher Scientific, Austin, Texas, USA
| | - S Singh
- Foundation Medicine, Cambridge, Massachusetts, USA
| | - H I Scher
- Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - K Schmitt
- Center for Data Intensive Science, University of Chicago, Chicago, Illinois, USA
| | - A Silvestro
- Novartis Institute for Biomedical Research, Cambridge, Massachusetts, USA
| | - J Simmons
- Personal Genome Diagnostics, Baltimore, Maryland, USA
| | - T Simmons
- Center for Data Intensive Science, University of Chicago, Chicago, Illinois, USA
| | - J Sislow
- Center for Data Intensive Science, University of Chicago, Chicago, Illinois, USA
| | - A Talasaz
- Guardant Health, Inc., Redwood City, California, USA
| | - P Tang
- Center for Data Intensive Science, University of Chicago, Chicago, Illinois, USA
| | - M Tewari
- University of Michigan, Ann Arbor, Michigan, USA
| | - S Tomlins
- University of Michigan, Ann Arbor, Michigan, USA
| | - H Toukhy
- Guardant Health, Inc., Redwood City, California, USA
| | - H R Tseng
- CytoLumina, Inc., Los Angeles, California, USA.,Crump Institute for Molecular Imaging, University of California, Los Angeles, California, USA
| | - M Tuck
- University of Michigan, Ann Arbor, Michigan, USA
| | - A Tzou
- Center for Device and Radiological Health, Food and Drug Administration, Silver Springs, Maryland, USA
| | - J Vinson
- Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Y Wang
- Epic Research and Diagnostics, San Diego, California, USA
| | - W Wells
- Open Commons Consortium, Chicago, Illinois, USA
| | - A Welsh
- Foundation Medicine, Cambridge, Massachusetts, USA
| | - J Wilbanks
- Sage Bionetworks, Seattle, Washington, USA
| | - J Wolf
- Provista Diagnostics Inc., New York, New York, USA
| | - L Young
- Foundation Medicine, Cambridge, Massachusetts, USA
| | - Jsh Lee
- Office of the Director, National Cancer Institute, Bethesda, Maryland, USA
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Pickles R, Iqbal S, Mulvenna P, Mcmenemin R, Kelly E, Atherton P, Turnbull H, Simmons T, Bradshaw A, Mackenzie L, Raven E. 137 10 years of CHART (continuous hyperfractionated accelerated radiotherapy) for non-small cell lung cancer (NSCLC) at NCCC. Lung Cancer 2016. [DOI: 10.1016/s0169-5002(16)30154-4] [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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15
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Hall S, Lambourne B, Aynsley E, Gardiner J, Greystoke A, Hughes A, Jones C, Leaning D, Li L, Mansy T, Margetts J, Mcdonald F, Mcmenemin R, Mulvenna P, Peedell C, Shakespeare D, Simmons T, Singhal S, Turnbull H. 57 Crizotinib in clinical practice: the North East of England's experience. Lung Cancer 2016. [DOI: 10.1016/s0169-5002(16)30074-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Simmons T, Goodburn B, Singhrao SK. Decision tree analysis as a supplementary tool to enhance histomorphological differentiation when distinguishing human from non-human cranial bone in both burnt and unburnt states: A feasibility study. Med Sci Law 2016; 56:36-45. [PMID: 26130749 DOI: 10.1177/0025802415589776] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This feasibility study was undertaken to describe and record the histological characteristics of burnt and unburnt cranial bone fragments from human and non-human bones. Reference series of fully mineralized, transverse sections of cranial bone, from all variables and specimen states, were prepared by manual cutting and semi-automated grinding and polishing methods. A photomicrograph catalogue reflecting differences in burnt and unburnt bone from human and non-humans was recorded and qualitative analysis was performed using an established classification system based on primary bone characteristics. The histomorphology associated with human and non-human samples was, for the main part, preserved following burning at high temperature. Clearly, fibro-lamellar complex tissue subtypes, such as plexiform or laminar primary bone, were only present in non-human bones. A decision tree analysis based on histological features provided a definitive identification key for distinguishing human from non-human bone, with an accuracy of 100%. The decision tree for samples where burning was unknown was 96% accurate, and multi-step classification to taxon was possible with 100% accuracy. The results of this feasibility study strongly suggest that histology remains a viable alternative technique if fragments of cranial bone require forensic examination in both burnt and unburnt states. The decision tree analysis may provide an additional but vital tool to enhance data interpretation. Further studies are needed to assess variation in histomorphology taking into account other cranial bones, ontogeny, species and burning conditions.
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Affiliation(s)
- T Simmons
- Department of Forensic Science, Virginia Commonwealth University, Richmond, VA, USA
| | - B Goodburn
- School of Forensic and Investigative Sciences, University of Central Lancashire, Preston, UK
| | - S K Singhrao
- Oral & Dental Sciences Research Group, School of Medicine and Dentistry, University of Central Lancashire, Preston, UK
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Nigrovic L, Mahajan P, Tzimenatos L, Alpern E, Rogers A, Simmons T, Casper C, Ramilo O, Kuppermann N. 239 The Accuracy of the Yale Observation Scale Score and Unstructured Clinician Suspicion to Identify Febrile Infants Aged ≤60 Days With Serious Bacterial Infections. Ann Emerg Med 2015. [DOI: 10.1016/j.annemergmed.2015.07.272] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Wein N, Vulin A, Simmons T, Molza A, Gumienny F, Huang N, Delalande O, Ervasti J, Weiss R, Flanigan K. Early expression of ΔCH1 dystrophin isoform reverses or prevents muscular dystrophy in the Dup2 mouse. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Schaninger C, Ventura A, Simmons T, Hart K, Lindsell C, Pancioli A. 208 Patient Expectations: Are We Meeting Them and Do They Affect Patient and Provider Satisfaction? Ann Emerg Med 2014. [DOI: 10.1016/j.annemergmed.2014.07.235] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wein N, Vulin A, Simmons T, Heller K, Rutherford A, Rodino-Kaplac L, Johnson D, Weiss R, Muntoni F, Flanigan K. G.P.94. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Augustine S, Simmons T, Sylvester C, Winner L, Hody R, Sampedro A, Parakh K. Heart Failure – Creating an Innovation Framework Using Technology And Manufacturing Company Methodologies To Develop a Heart Failure Program. Heart Lung 2013. [DOI: 10.1016/j.hrtlng.2013.06.032] [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: 11/17/2022]
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Augustine S, Sampedro A, Sylvester C, Simmons T, Parakh K. Development of Identification Tools to Facilitate Maximal Detection of Patients Admitted with Heart Failure. Heart Lung 2013. [DOI: 10.1016/j.hrtlng.2013.06.033] [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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Simmons T, Augustine S, Makadia S, Kovell L, Harris C, Chibungu A, Parakh K. IV Diuresis Clinic: Exploring A Population of Heart Failure Patient Needs and Outcomes. Heart Lung 2013. [DOI: 10.1016/j.hrtlng.2013.06.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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24
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Simmons T, Lewis B, Makadia S, Parakh K. 22. IV Diuresis clinic: An innovative approach to patient care and case management with a novel role for the heart failure nurse. Heart Lung 2012. [DOI: 10.1016/j.hrtlng.2012.04.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
Bizarre parosteal osteochondromatous proliferation of bone (BPOP) is a benign lesion that is occasionally misinterpreted as a malignant process. The original reports described lesions exclusively in the hands and feet. However, subsequent reports have included additional sites in the long bones, skull, and maxilla. The differential diagnosis of BPOP includes numerous benign and malignant lesions. The benign differential diagnosis includes osteochondroma and reactive processes. The most important malignant differential diagnosis is parosteal osteosarcoma. We present a case of an 11-year-old boy with recurrent BPOP and review the literature. We discuss the differential diagnosis and pathogenesis of the lesion.
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Affiliation(s)
- A Oviedo
- Department of Pathology, Children's Memorial Hospital, Chicago, IL 60614, USA
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Adams W, Davis T, Rossignol A, Silverman G, Simmons T, Smith G, Stern B. Undergraduate environmental health education: preparing for the future. J Environ Health 2001; 63:27-31. [PMID: 11381469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Attendees indicated that the workshop was beneficial and that the opportunity to communicate with faculty representing 23 programs accredited by EHAC and nine programs not accredited by EHAC was extremely useful. There was general agreement on a number of points: There is a need for undergraduate environmental health programs to collaborate on matters related to distance learning. Topics related to women, gender, diversity, ethics, and international environmental health should be incorporated into the environmental health curriculum. There are no major problems with current EHAC curricular guidelines, but the guidelines should be evaluated on a regular basis. Field experience or internship is an essential component in the academic preparation of undergraduate environmental health students. There is a significant need for increased funding for undergraduate environmental health programs. There is a need to increase the visibility and recognition of environmental health programs. There is a need to solidify ties with traditional partners and to establish new linkages at the local, regional, and national levels in the government, community, and private sector. It is essential that undergraduate faculty communicate with each other on matters relating to the preparation of environment health practitioners. There is a need for an association of undergraduate academic programs to provide leadership and a focal point for identification and resolution of issues common to all. The establishment of an association was viewed as the most practical and effective way to address these issues and to pursue related opportunities.
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Dall L, Simmons T, Peterson S, Herndon B. Beta-blocker use in patients with acute myocardial infarction treated by hospitalists. Manag Care Interface 2000; 13:61-3, 69. [PMID: 11067397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
It is well recognized that the administration of beta blockers to patients after myocardial infarction improves survival. This retrospective cohort and prospective study sought to define the usage of a large hospitalist group and enhance this usage by education and the utilization of a uniform discharge summary. All patients with a discharge diagnosis of acute myocardial infarction were included for analysis. The use of beta blockers by the hospitalist group was initially collected retrospectively and compared with two large cohorts. The data were presented to the hospitalist group. Prospective data collection then commenced. Retrospective analysis of the use of beta blockers showed a rate of 68% as compared with 21% and 34% in two large cohorts (P < .0001). After data were reviewed and conference occurred, prospective use of beta blockers increased to 90% (P < .0005). Patients with myocardial infarction were extremely likely to be treated with beta blockers by this hospitalist group. Review of previous usage and review of contraindications along with the use of a uniform discharge summary resulted in a significant increase in the use of these life-saving drugs.
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Affiliation(s)
- L Dall
- Midwest Hospital Specialists, Kansas City, Missouri, USA
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28
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Simmons T, Newhouse YM, Arnold KS, Innerarity TL, Weisgraber KH. Human low density lipoprotein receptor fragment. Successful refolding of a functionally active ligand-binding domain produced in Escherichia coli. J Biol Chem 1997; 272:25531-6. [PMID: 9325268 DOI: 10.1074/jbc.272.41.25531] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [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] [Indexed: 02/05/2023] Open
Abstract
The low density lipoprotein (LDL) receptor plays a key role in cholesterol homeostasis, mediating cellular uptake of lipoprotein particles by high affinity binding to its ligands, apolipoprotein (apo) B-100 and apoE. The ligand-binding domain of the LDL receptor contains 7 cysteine-rich repeats of approximately 40 amino acids; each repeat contains 6 cysteines, which form 3 intra-repeat disulfide bonds. As a first step toward determining the structure of the LDL receptor, both free and bound to its ligands, we produced in Escherichia coli a soluble fragment containing the ligand-binding domain (residues 1-292) as a thrombin-cleavable, heat-stable thioredoxin fusion. Modest amounts (5 mg/liter) of partially purified but inactive fragment were obtained after cell lysis, heat treatment, thrombin cleavage, and gel filtration under denaturing conditions. We were able to refold the receptor fragment to an active conformation with approximately 10% efficiency. The active fragment was isolated and purified with an LDL affinity column. The refolded receptor fragment was homogeneous, as determined by sodium dodecyl sulfate or non-denaturing polyacrylamide gel electrophoresis and isoelectric focusing. The purified fragment did not react with fluorescein-5-maleimide, indicating that all 42 cysteines were disulfide linked. In addition, the refolded fragment exhibited properties identical to those of the intact native receptor: Ca2+-dependent binding and isoform-dependent apoE binding (apoE2 binding <5% of apoE3). Furthermore, antibodies to the fragment recognized native receptors and inhibited the binding of 125I-LDL to fibroblast LDL receptors. We conclude that we have produced a properly folded and fully active receptor fragment that can be used for further structural studies.
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Affiliation(s)
- T Simmons
- Gladstone Institute of Cardiovascular Disease, Cardiovascular Research Institute, Department of Pathology, University of California, San Francisco, California 94110, USA
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29
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Bedikian AY, Legha SS, Eton O, Buzaid AC, Papadopoulos N, Coates S, Simmons T, Neefe J, von Roemeling R. Phase II trial of tirapazamine combined with cisplatin in chemotherapy of advanced malignant melanoma. Ann Oncol 1997; 8:363-7. [PMID: 9209666 DOI: 10.1023/a:1008249232000] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [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: 02/04/2023] Open
Abstract
PURPOSE A phase II study was undertaken to determine the efficacy of tirapazamine (TPZ) combined with cisplatin (cDDP) in patients with metastatic melanoma. PATIENTS AND METHODS Between June 1994 and November 1995, 48 patients with metastatic melanoma were treated with TPZ (260 mg/m2, administered intravenously over two hours) followed in one-hour by cDDP (75 mg/m2 over one hour) every 21 days. Sixteen patients had received prior chemotherapy, and 13 of these had failed to respond to prior cDDP. None of the patients had symptomatic brain metastasis. RESULTS Nine patients had partial responses, with an overall response rate of 19% (95% confidence interval (95% CI) of 9%-33%). The median duration of response was six months. None of the responders had received prior chemotherapy. Responses were seen in 8 (33%, confidence interval of 16%-55%) of 24 patients with primary cutaneous melanoma who had received no prior chemotherapy and in the only patient with previously untreated conjunctival melanoma. There were no responders among the seven patients with choroidal melanoma and 16 patients with previously treated cutaneous melanoma. Two patients with partial responses were rendered free of gross disease surgically three months after completing eight courses of TPZ-cDDP; they remain free of tumor recurrence. Responses were seen in lymph nodes (27%), lung (26%), skin (20%), adrenal gland (20%), soft tissues (17%) and liver (17%). Common toxicities included muscle cramps, fatigue, gastrointestinal effects and peripheral neuropathy. Fatigue, nausea, vomiting, anorexia, and muscle cramps were grade 3 or 4 in less than 10% of the courses. Neutropenia and thrombocytopenia were rare. CONCLUSION The TPZ-cDDP combination has definite activity against chemotherapy-naïve patients with cutaneous melanoma and warrant further studies in combination with other cytotoxic agents.
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Affiliation(s)
- A Y Bedikian
- Department of Melanoma/Sarcoma Medical Oncology, University of Texas M. D. Anderson Cancer Center, Houston, USA
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30
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Dong LM, Parkin S, Trakhanov SD, Rupp B, Simmons T, Arnold KS, Newhouse YM, Innerarity TL, Weisgraber KH. Novel mechanism for defective receptor binding of apolipoprotein E2 in type III hyperlipoproteinemia. Nat Struct Biol 1996; 3:718-22. [PMID: 8756331 DOI: 10.1038/nsb0896-718] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The defective binding of apolipoprotein (apo) E2 to lipoprotein receptors, an underlying cause of type III hyperlipoproteinemia, results from replacement of Arg 158 with Cys, disrupting the naturally occurring salt bridge between Asp 154 and Arg 158. A new bond between Asp 154 and Arg 150 is formed, shifting Arg 150 out of the receptor binding region. Elimination of the 154-150 salt bridge by site-directed mutagenesis of Asp 154 to Ala restored the receptor binding activity to near normal levels. The X-ray crystal structure of apoE2 Ala 154 demonstrated that Arg 150 was relocated within the receptor binding region. Our results demonstrate that defective binding of apoE2 occurs by a novel mechanism of the replacement of one salt bridge with another.
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Affiliation(s)
- L M Dong
- Gladstone Institute of Cardiovascular Disease, University of California, San Francisco 94141-9100, USA
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31
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Dong LM, Wilson C, Wardell MR, Simmons T, Mahley RW, Weisgraber KH, Agard DA. Human apolipoprotein E. Role of arginine 61 in mediating the lipoprotein preferences of the E3 and E4 isoforms. J Biol Chem 1994; 269:22358-65. [PMID: 8071364] [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: 01/28/2023] Open
Abstract
Human apolipoprotein (apo) E4 (arginine at residue 112) preferentially associates with very low density lipoproteins (VLDL), and apoE3 (cysteine at 112) associates with high density lipoproteins. It has been postulated that the amino-terminal domain, which contains residue 112, influences the lipoprotein preference by interacting with the carboxyl-terminal domain, which contains the lipid-binding region. To delineate the region in the carboxyl-terminal domain mediating lipoprotein binding and involved in isoform preference, we produced truncated apoE3 and apoE4 variants (terminating at residues 251, 260, 266, or 272) in Escherichia coli and assessed them for lipoprotein association. This analysis suggested that residues 260-272 contain important determinants for complete lipoprotein association and isoform preferences. To determine whether positive charge at residue 112 was an absolute requirement for the apoE4 VLDL preference, we compared the distributions of rabbit apoE (equivalent to apoE3, with cysteine at a position corresponding to 112), canine apoE (arginine at the corresponding site), and cysteamine-treated rabbit apoE (cysteine converted to a positively charged residue). Surprisingly, all distributed like human apoE3, suggesting that positive charge at a position corresponding to 112 was not directly responsible for the isoform preference and that other residues in the amino-terminal domain were involved. To determine which residues were involved, the structure of the apoE4 22-kDa fragment (the amino-terminal two-thirds of the molecule) was determined to 2.5 A by x-ray crystallography. Compared with the known four-helix bundle structure of apoE3, the only significant differences in the apoE4 structure were that glutamic acid 109 formed a salt bridge with arginine 112 and that the arginine 61 side chain was displaced to a new position. Site-directed mutagenesis of glutamic acid 109 in apoE3 and arginine 61 in apoE4 demonstrated that the position of the arginine 61 side chain in apoE4 was critical in determining apoE4 lipoprotein distribution, suggesting that arginine 61 interacted with the carboxyl-terminal domain to direct binding to VLDL.
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Affiliation(s)
- L M Dong
- Gladstone Institute of Cardiovascular Disease, University of California, San Francisco 94141-9100
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32
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Masur H, Polis MA, Tuazon CU, Ogata-Arakaki D, Kovacs JA, Katz D, Hilt D, Simmons T, Feuerstein I, Lundgren B. Salvage trial of trimetrexate-leucovorin for the treatment of cerebral toxoplasmosis in patients with AIDS. J Infect Dis 1993; 167:1422-6. [PMID: 8501335 DOI: 10.1093/infdis/167.6.1422] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The clinical efficacy of trimetrexate, a dihydrofolate reductase inhibitor with potent in vitro antitoxoplasma activity, was assessed in 9 sulfonamide-intolerant patients with AIDS and biopsy-proven cerebral toxoplasmosis. The 9 patients were treated for 28-149 days with trimetrexate (30-280 mg/m2/day) plus leucovorin (20-90 mg/m2 every 6 h). Radiographic responses were documented in 8 patients, and clinical responses in 5 patients. Despite continued therapy, all patients deteriorated clinically and radiographically within 13-109 days of their initial improvement. Trimetrexate at very high doses for extended periods was not associated with serious toxicity. Trimetrexate alone had dramatic but transient activity in sulfonamide-intolerant patients and thus is not adequate as single-agent therapy for AIDS-associated toxoplasmosis.
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Affiliation(s)
- H Masur
- National Institutes of Health, Bethesda, MD 20892
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Woscoboinik JR, Maloney JD, Helguera ME, Mercho N, Alexander LA, Wilkoff B, Simmons T, Morant V, Castle LW. Pacing lead survival: performance of different models. Pacing Clin Electrophysiol 1992; 15:1991-5. [PMID: 1279586 DOI: 10.1111/j.1540-8159.1992.tb03008.x] [Citation(s) in RCA: 24] [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: 12/26/2022]
Abstract
UNLABELLED Recent reports have shown poor survival of some leads currently in use. Long-term survival analysis of 2,444 leads (1,059 atrial and 1,385 ventricular) implanted in this institution since January 1980, and having at least 1 month of follow-up was performed. The survival of 123 different models was compared with the average survival of all the leads implanted in the corresponding chamber. Failure was defined as inactivation of the lead (electrical abandonment, explant, or cap) due to insulator and/or conductor fracture. RESULTS The mean follow-up was 33 +/- 32 months. The cumulative survival for different atrial lead models was consistent with the average performance in the atrium. No atrial lead showed better or worse survival compared to the others. In the ventricular group, the Medtronic 4012 lead showed statistically significant poorer survival (P = 0.01) compared with the average survival of the ventricular leads. The Cardiac Pacemakers, Inc. (CPI) 4010 lead showed a nonsignificant (P = 0.12) worse performance than the average for ventricular leads. CONCLUSIONS (1) The Medtronic 4012 had a significantly poorer performance than the rest of the leads. A trend in similar direction was found for the CPI 4010, also in the ventricular group; (2) Atrial lead models showed a stable survival; and (3) Frequent follow-up is required for some leads, especially in pacemaker dependent patients.
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Affiliation(s)
- J R Woscoboinik
- Department of Cardiology, Cleveland Clinic Foundation, Ohio 44195
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34
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Abstract
The hemodynamic consequences of atrioventricular (AV) synchrony during ventricular tachycardia were evaluated during cardiac electrophysiologic testing. The relationship between stroke volume and the AV interval was investigated on a beat-by-beat basis in six patients during induced monomorphic ventricular tachycardia. Stroke volume was calculated either (1) in the right ventricle using impedance catheter method (four patients) or (2) in the left ventricle using Doppler measurement of aortic blood velocity (two patients). The impedance catheter method underestimated stroke volume by a factor of 4.2 +/- 2.4 compared with the thermodilution cardiac output method. However, there was a highly linear relationship between both methods for computing stroke volume (r greater than 0.9). Five patients had complete AV dissociation during ventricular tachycardia, and different AV intervals spanned the entire tachycardia cycle lengths. Largest stroke volumes were associated with optimal AV intervals within 120 and 230 msec, resulting in a 97 +/- 59% increase in stroke volume over ventricular tachycardia cycles not associated with atrial activity. Customized atrial pacing during ventricular tachycardia may provide a valuable means for artificially establishing the hemodynamically optimal AV interval and eliminating the ventricular tachycardia cycles not preceded by atrial activity.
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Affiliation(s)
- J Maloney
- Department of Cardiology, Cleveland Clinic Foundation, OH 44195
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35
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Obarski TP, Underwood DA, Simmons T. Signal-averaged electrocardiography for detection of ventricular tachycardia using fast Fourier transform filtering on a standard ECG cart. Cleve Clin J Med 1991; 58:510-2. [PMID: 1752032 DOI: 10.3949/ccjm.58.6.510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Signal-averaged electrocardiography has been advocated as a technique to predict the occurrence of ventricular tachycardia, especially in patients with ischemic heart disease. We studied a heterogeneous population of 77 patients referred for electrophysiologic testing using a recently developed fast Fourier transform filtering system available as part of a standard electrocardiography cart. The sensitivity, specificity, and positive predictive accuracy of this system were consistent with those previously determined using bidirectional Butterworth filters or finite impulse response filtering techniques. This new filtering approach in generation of signal-averaged ECG data for detection of ventricular tachycardia has promise but will require use in larger groups to establish its true clinical value.
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Affiliation(s)
- T P Obarski
- Department of Cardiology, Cleveland Clinic Foundation, OH 44195
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36
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Weschke E, Laubschat C, Simmons T, Domke M, Strebel O, Kaindl G. Surface and bulk electronic structure of Ce metal studied by high-resolution resonant photoemission. Phys Rev B Condens Matter 1991; 44:8304-8307. [PMID: 9998767 DOI: 10.1103/physrevb.44.8304] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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McCowan R, Maloney J, Wilkoff B, Simmons T, Khoury D, McAlister H, Morant V, Castle L. Automatic implantable cardioverter-defibrillator implantation without thoracotomy using an endocardial and submuscular patch system. J Am Coll Cardiol 1991; 17:415-21. [PMID: 1991899 DOI: 10.1016/s0735-1097(10)80108-1] [Citation(s) in RCA: 92] [Impact Index Per Article: 2.8] [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: 12/29/2022]
Abstract
The automatic cardioverter-defibrillator lead system is implanted by a thoracotomy procedure that may result in atelectasis, pleural effusion, cardiac tamponade and lengthy convalescence. A new defibrillator lead system that allows selection of different defibrillating current pathways is implanted without a thoracotomy. Ten patients requiring a cardioverter-defibrillator for recurrent sustained ventricular tachycardia (five patients) or aborted sudden cardiac death (five patients) were evaluated for implantation of this lead system. A lead configuration with a bidirectional defibrillating current pathway was implanted in nine patients. The defibrillation threshold with this lead configuration was 15 J in five patients, 20 J in three and 30 to 35 J in one patient. In the remaining patient the lead system had a 40 J defibrillation threshold and was not implanted. No perioperative complications occurred. Induced ventricular fibrillation was successfully terminated at the predischarge and intermediate follow-up (8 to 12 weeks) electrophysiologic studies. During the follow-up period, there were three deaths (one sudden, two due to heart failure) and two lead system failures (oversensing with inappropriate shocks in one patient and patch lead fracture in another). Implantation of the cardioverter-defibrillator lead system by a nonthoracotomy approach is feasible, has no significant perioperative complications and is well tolerated by patients. Effective defibrillation was demonstrated immediately as well as at intermediate follow-up study. The occurrence of patch lead fracture and oversensing requires improvement in the present (nonthoracotomy) lead system technology.
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Affiliation(s)
- R McCowan
- Department of Cardiology, Cleveland Clinic Foundation, Ohio 44195-5058
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38
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Maloney J, Masterson M, Khoury D, Trohman R, Wilkoff B, Simmons T, Morant V, Castle L. Clinical performance of the implantable cardioverter defibrillator: electrocardiographic documentation of 101 spontaneous discharges. Pacing Clin Electrophysiol 1991; 14:280-5. [PMID: 1706838 DOI: 10.1111/j.1540-8159.1991.tb05107.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Records of 105 patients, who received an automatic implantable cardioverter defibrillator (AICD), were studied to investigate the causes of spontaneous AICD discharges and to correlate the symptoms with the arrhythmias triggering AICD discharges. During a follow-up period of 13 +/- 8 months, 46/105 (44%) patients had 566 spontaneous AICD discharges. A total of 101 discharges were documented with Holter monitoring in 23 patients. In this study group, there were 8 (8%) AICD discharges for 5 episodes of ventricular fibrillation, and 68 (67%) discharges for 63 episodes of sustained ventricular tachycardia. Patients lost consciousness in all episodes of ventricular fibrillation, but were symptomatic prior to only 36 (53%) discharges in ventricular tachycardia. Nonsustained ventricular tachycardia persisting for a period of 7.5 +/- 2 seconds resulted in 20 AICD discharges; patients were symptomatic prior to 13 (65%) discharges. Supraventricular tachycardias triggered three discharges. One patient had two spurious discharges during sinus rhythm. In conclusion, most of the spontaneous AICD discharges were appropriate for the detected rhythms, but only clinically appropriate for the management of arrhythmias in 75% of the cases. A significant portion of the patients with sustained or nonsustained ventricular tachycardias triggering AICD discharges were asymptomatic prior to discharge, which requires further assessment of the physiology of the arrhythmia as a component of the detection algorithm.
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Affiliation(s)
- J Maloney
- Department of Cardiology, Cleveland Clinic Foundation, Ohio 44195
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Vanerio G, Maloney J, Rashidi R, McCowan R, Castle L, Morant V, Wilkoff B, Simmons T. The effects of percutaneous catheter ablation on preexisting permanent pacemakers. Pacing Clin Electrophysiol 1990; 13:1637-45. [PMID: 1704517 DOI: 10.1111/j.1540-8159.1990.tb06866.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
STUDY OBJECTIVE Determine the effect of percutaneous catheter ablation (CA) on permanent pacemakers. MEASUREMENTS AND RESULTS Twenty-three patients who underwent CA at The Cleveland Clinic Foundation from September 1983 to January 1990, and had a previously implanted pacemaker were studied. Electrocardiographic data during the CA procedure and clinic data including pacemaker evaluations were analyzed. Fifty-two percent (12/23) of the pacemakers malfunctioned: five developed transient ventricular loss of capture; two undersensing; one oversensing; three could not be interrogated or programmed, and one did not respond to the magnet test. Four patients developed syncopal episodes and two severe dizziness after the procedure. All had their pacemakers replaced. In total, seven were explanted. Destructive analysis by the individual manufacturer identified pacemaker circuitry failure in five. Unipolar pacemakers and anodal ablation procedures had more frequent and severe malfunctions, but the difference was not statistically significant. CONCLUSIONS Pacemaker malfunction is frequent during CA. It may be prevented by programming the pacemaker, when possible, to the nonfunctioning mode (000 mode). Temporarily disconnecting the pacemaker during ablation requires further evaluation as an alternative approach. Close follow-up can detect pacemaker malfunction and prevent complications.
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Affiliation(s)
- G Vanerio
- Department of Cardiology, Cleveland Clinic Foundation, Ohio 44195
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40
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Simmons T, Jantz RL, Bass WM. Stature estimation from fragmentary femora: a revision of the Steele method. J Forensic Sci 1990; 35:628-36. [PMID: 2348179] [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: 12/31/2022]
Abstract
The skeletal remains presented to forensic anthropologists are often fragmentary. Previously described methods of estimating stature from segments of long bones have not proved satisfactory because of the difficulty involved in identifying the precise anatomical landmarks by which they are defined. This study represents an assessment of the feasibility of stature estimation from fragmentary femora. A sample of 200 males and females, blacks and whites (total sample = 800), was obtained from the Terry Collection. New regression equations for the estimation of maximum femur length and stature from three well-defined and easy-to-measure segments of the femur are presented. This technique represents an improvement over methods currently in use for estimating stature from femur fragments; the location of the anatomical landmarks and the accuracy of the prediction are enhanced. The applicability of these formulae to a modern forensic sample is addressed with regard to secular trends in stature increase and changes in body segment proportions.
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Affiliation(s)
- T Simmons
- Department of Anthropology, University of Tennessee, Knoxville
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41
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Khoury D, McAlister H, Wilkoff B, Simmons T, Rudy Y, McCowan R, Morant V, Castle L, Maloney J. Continuous right ventricular volume assessment by catheter measurement of impedance for antitachycardia system control. Pacing Clin Electrophysiol 1989; 12:1918-26. [PMID: 2481290 DOI: 10.1111/j.1540-8159.1989.tb01885.x] [Citation(s) in RCA: 34] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Current implantable defibrillators are unable to differentiate between hemodynamically stable and unstable arrhythmias. This may result in unnecessary high energy shocks during arrhythmias that are better managed with other interventions. This study assessed the efficacy of the impedance catheter in sensing relative volumetric changes in the right ventricle as a measure of the hemodynamic status during an arrhythmia. During electrophysiological testing, 37 arrhythmias were induced in 12 patients aged 28-74 years. Rhythms recorded were: (A) hemodynamically stable tachyarrhythmias (supraventricular tachycardia and sustained monomorphic ventricular tachycardia)--21 episodes; and (B) hemodynamically unstable ventricular arrhythmias causing syncope (hypotensive ventricular tachycardia and ventricular fibrillation)--16 episodes. During unstable arrhythmias, stroke impedance (32 +/- 17%), arterial systolic pressure (40 +/- 11%), and right ventricular pulse pressure (15 +/- 20%), expressed as percentages of corresponding sinus rhythm values, were significantly lower than in stable arrhythmias (84 +/- 26%, 72 +/- 8%, and 111 +/- 37%, respectively); P less than 0.001. There was a good correlation between stroke impedance and mean arterial pressure during arrhythmia (r = 0.84). Impedance sensing is a practical method for distinguishing between hemodynamically stable and unstable arrhythmias. Implementation of hemodynamic sensing into the algorithm of future antitachycardia systems may improve the management of arrhythmias by adding options for selective pace termination or cardioversion.
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Affiliation(s)
- D Khoury
- Department of Cardiology, Cleveland Clinic Foundation, OH 44106
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Cooper D, Wilkoff B, Masterson M, Castle L, Belco K, Simmons T, Morant V, Streem S, Maloney J. Effects of extracorporeal shock wave lithotripsy on cardiac pacemakers and its safety in patients with implanted cardiac pacemakers. Pacing Clin Electrophysiol 1988; 11:1607-16. [PMID: 2462246 DOI: 10.1111/j.1540-8159.1988.tb06280.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.1] [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: 01/01/2023]
Abstract
UNLABELLED Effects of extracorporeal shock wave lithotripsy (ESWL) were studied on 15 pacemakers (standard single chamber n = 5, dual chamber n = 6, rate responsive single chamber [Activitrax] n = 4). In-vitro testing involved suspending the pacemakers in a bath of degassified, deionized water firmly taped to a platform at the point of maximal pressure, i.e., second focal point (F2), where they received pressure shocks (means = 1300) from the HM3 Dornier lithotriptor. The pacemakers, programmed to their most sensitive setting, were continuously pacing at nominal outputs (atrial and ventricular pacing in the DDD mode). All units were assessed by a pacing system analyzer before and after the study, then underwent destructive analysis. During standard single chamber pacing (VVI) the pacing stimulus triggered ESWL. For dual chamber devices, ESWL was triggered by the atrial paced event which induced inhibition of the ventricular output in two pacemaker. This was eliminated by reprogramming to a less sensitive setting. The pacemaker can, hermetic seal and internal circuitry were undamaged in all units. Two rate responsive single chamber pacemakers had their activity sensing piezoelectric elements shattered when placed at F2. Two other units placed 5 cm from F2 were stimulated to their maximum upper programmed pacing rate with ESWL therapy, but were otherwise unaffected. Subsequent to this study, six patients with pacemakers programmed to the VVI (five), DDD (one) modes implanted in the thorax underwent successful ESWL without pacemaker or arrhythmic event. CONCLUSIONS (A) It is generally safe for patients implanted with standard single chamber devices in a ventricular application to undergo ESWL without modifying the pacing/sensing parameters. (B) Patients implanted with dual chamber devices who pace in the atrium should be reprogrammed to the VVI mode during ESWL. (C) Patients with piezoelectric activity sensing rate responsive single chamber pacemakers should have this feature programmed off during ESWL and, if implanted in the abdomen, probably should not undergo ESWL.
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Affiliation(s)
- D Cooper
- Department of Cardiology, Cleveland Clinic Foundation, Ohio
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Abstract
Saccharomyces cerevisiae contains at least 24 distinct small nuclear RNAs (snRNAs), several of which are known to be essential for viability and to participate in the splicing of pre-mRNAs; the RNAs in this subset contain binding sites for the Sm antigen, a hallmark of metazoan snRNAs involved in mRNA processing. In contrast, we showed previously that the single-copy genes for three other snRNAs (snR3, snR4, and snR10) are not required for viability, although cells lacking snR10 are growth impaired at low temperature. None of these RNAs associates with the Sm antigen. To assess this apparent correlation, we cloned and sequenced the genes encoding three additional non-Sm snRNAs. Comparison of these genes with nine additional yeast snRNA genes revealed a highly conserved TATA box located 92 +/- 8 nucleotides 5' of the transcriptional start site. By using the technique of gene replacement with null alleles, each of these three single copy genes was shown to be completely dispensable. We constructed multiple mutants to test the hypothesis that, individually, each of these snRNAs is nonessential because the snRNAs play functionally overlapping roles. A mutant lacking five snRNAs (snR3, snR4, snR5, snR8, snR9) was indistinguishable from the wild type, and growth of the sextuple mutant was no more impaired than that in strains lacking only snR10. This widespread dispensability of snRNAs was completely unexpected and forces us to reconsider the possible roles of these ubiquitous RNAs.
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Affiliation(s)
- R Parker
- Department of Biochemistry and Biophysics, University of California, San Francisco 94143
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Merine DS, Fishman EK, Jones B, Nussbaum AR, Simmons T. Right lower quadrant pain in the immunocompromised patient: CT findings in 10 cases. AJR Am J Roentgenol 1987; 149:1177-9. [PMID: 3500605 DOI: 10.2214/ajr.149.6.1177] [Citation(s) in RCA: 38] [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: 01/06/2023]
Abstract
Ten immunosuppressed patients with right lower quadrant pain were examined by CT. Underlying conditions responsible for immunosuppression included acute myelogenous leukemia (n = 2), acute lymphocytic leukemia (n = 2), aplastic anemia (n = 2), AIDS (n = 3), and cystic fibrosis combined with prolonged steroid therapy for bronchospasm (n = 1). CT suggested the diagnosis of typhlitis (n = 7), intramural hemorrhage (n = 1), ileal perforation (n = 1), and appendiceal abscess (n = 1). The diagnosis of typhlitis was established by clinical evaluation in five patients, by colonoscopy in one patient, and by autopsy in another patient. The single cases of intestinal hemorrhage, ileal perforation, and appendiceal abscess were confirmed by exploratory laparotomy. It is difficult to make an accurate diagnosis of acute abdominal conditions in the immunosuppressed patient. Symptoms and physical findings are often suppressed as a result of steroid or immunosuppressive therapy. CT, being noninvasive, is useful in the evaluation of persistent right lower quadrant pain in the immunocompromised patient.
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Affiliation(s)
- D S Merine
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions, Baltimore, MD 21205
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Abstract
A rate responsive cardiac pacemaker will benefit the patient only if the input parameter is a reliable indicator of exercise. Part of the reliability is dependent upon selection of the best physiological parameter and part is dependent upon the measurement technique. Twenty-six patients have been studied in order to ascertain the best measurement configuration for an intravascular impedance respiratory monitor. Four electrode configurations have been examined at rest and during exercise. The results have been compared using measures of sensitivity and specificity. The ideal configuration requires that a current field be established between the right ventricular blood and the pacemaker case. And, that voltage sensing be done between an electrode in the SVC and the pacemaker case.
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Simmons T, Lipman M, Hodge LD. Uptake and early fate of metaphase chromosomes ingested by the Wi-L2 human lymphoid cell line. Somatic Cell Genet 1978; 4:55-76. [PMID: 628885 DOI: 10.1007/bf01546493] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Aspects of the ingestion and early intracellular fate of homologous. [3H]-thymidine-labeled chromosomes (donor) were studied in recipient Wi-L2 cells in the absence of reutilized radioactivity. As much as 67% of the cell-associated radioactivity was resistant to hydrolysis by DNase I after 4 h of incubation. Cell fractionation and electron microscope autoradiography indicated that chromosome uptake was rapid, into both cytoplasmic and nuclear fractions and was facilitator and dose dependent. Sedimentation analysis demonstrated that at 4 h donor DNA of approximate single-strand mol wt of 1--6 X 10(6), as compared to 6--12 X 10(6) for chromosomal DNA, was recoverable in cell fractions. By 6 h, a significant portion of the nucleus-associated donor DNA was converted into material of higher mol wt, although no evidence was found for integration into recipient DNA. Cytoplasmic donor DNA continued to be degraded. An average number of chromosome equivalents of nucleus-associated donor DNA to recipient cell nuclei of 1--4 was obtained and its relationship to the lower frequency of chromosome-mediated gene transfer is discussed.
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Heywood P, Hodge L, Davis F, Simmons T. A simple method for holding electron microscope grids during autoradiography of serial sections. J Microsc 1977; 110:167-9. [PMID: 915939 DOI: 10.1111/j.1365-2818.1977.tb00029.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A simple, reliable, and inexpensive method is described for holding electron microscope grids during the application of photographic emulsion and during subsequent storage and processing. This method has proved to be especially useful in autoradiographic studies using serial sections.
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Abstract
Eight cases of rectal diverticula are discussed with reference to the etiological, clinical and radiological findings. Males predominated 3:1 and the average number of diverticula in each patient was 2. Diverticulosis of the remaining colon, especially the sigmoid segment, always accompanied rectal diverticula. The average diameter of rectal diverticula was larger than that of the colonic: 2.5 cm vs. 0.5-1.0 cm. Rectal diverticula may be confused with a carcinoma at endoscopy. Surgical treatment becomes necessary if the diverticulum progresses to abscess formation and perforation.
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Abstract
The restitution of RNA synthesis in cultures progressing from metaphase into interphase (G(1)) has been investigated in synchronized HeLa S(3) cells by using inhibitors of macro-molecular synthesis and the technique of electron microscope autoradiography. The rate of incorporation of radioactive uridine into RNA approached interphase levels in the absence of renewed protein synthesis. In contrast, maintenance of this rate in G(1) was dependent upon renewed protein synthesis. Restoration of synthesis of heterogeneous nuclear RNA occurred under conditions that inhibited production of ribosomal precursor RNA. In autoradiographs of individual cells exposed to radioactive uridine, silver grains were first detected after nuclear envelope reformation at the periphery of the chromosome mass but before chromosomal decondensation. These data are consistent with the following interpretation. Multiple RNA polymerase activities persist through mitosis and are involved in the initiation of RNA synthesis in early telophase at sites on the nuclear envelope.
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