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Meltzer AC, Wargowsky RS, Moran S, Jordan T, Toma I, Jepson T, Shu S, Ma Y, McCaffrey TA. Diagnostic accuracy of novel mRNA blood biomarkers of infection to predict outcomes in emergency department patients with undifferentiated abdominal pain. Sci Rep 2023; 13:2297. [PMID: 36759691 PMCID: PMC9909648 DOI: 10.1038/s41598-023-29385-3] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 02/03/2023] [Indexed: 02/11/2023] Open
Abstract
Abdominal pain represents greater than 20% of US Emergency Department (ED) visits due to a wide range of illnesses. There are currently no reliable blood biomarkers to predict serious outcomes in patients with abdominal pain. Our previous studies have identified three mRNA transcripts related to innate immune activation: alkaline phosphatase (ALPL), interleukin-8 receptor-β (IL8RB), and defensin-1 (DEFA1) as promising candidates to detect an intra-abdominal infection. The objective of this study was to evaluate the accuracy of these mRNA biomarkers to predict likely infection, hospitalization and surgery in Emergency Department patients with undifferentiated abdominal pain. We prospectively enrolled Emergency Department patients with undifferentiated abdominal pain who received an abdominal CT scan as part of their evaluation. Clinical outcomes were abstracted from the CT scan and medical records. mRNA biomarker levels were calculated independent of the clinical outcomes and their accuracy was assessed to predict infectious diagnoses, surgery and hospital admission. 89 patients were enrolled; 21 underwent surgery; 47 underwent hospital admission; and, no deaths were observed within 30 days. In identifying which cases were likely infectious, mRNA biomarkers' AUC values were: ALPL, 0.83; DEFA1 0.51; IL8RB, 0.74; and ALPL + IL8RB, 0.79. In predicting which Emergency Department patients would receive surgery, the AUC values were: ALPL, 0.75; DEFA1, 0.58; IL8RB, 0.75; and ALPL + IL8RB, 0.76. In predicting hospital admission, the AUC values were: ALPL, 0.78; DEFA1, 0.52; IL8RB, 0.74; and, ALPL + IL8RB, 0.77. For predicting surgery, ALPL + IL8RB's positive likelihood ratio (LR) was 3.97; negative LR (NLR) was 0.70. For predicting hospital admission, the same marker's positive LR was 2.80 with an NLR of 0.45. Where the primary cause for admission was a potentially infectious disorder, 33 of 34 cases (97%) had positive RNA scores. In a pragmatic, prospective diagnostic accuracy trial in Emergency Department patients with undifferentiated abdominal pain, mRNA biomarkers showed good accuracy to identify patients with potential infection, as well as those needing surgery or hospital admission.
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Affiliation(s)
- Andrew C Meltzer
- Department of Emergency Medicine, School of Medicine and Health Sciences, The George Washington University Medical Center, Washington, DC, 20037, USA.
| | - Richard S Wargowsky
- Division of Genomic Medicine, Department of Medicine, The George Washington University Medical Center, Washington, DC, 20037, USA
| | - Seamus Moran
- Department of Emergency Medicine, School of Medicine and Health Sciences, The George Washington University Medical Center, Washington, DC, 20037, USA
| | - Tristan Jordan
- Department of Emergency Medicine, School of Medicine and Health Sciences, The George Washington University Medical Center, Washington, DC, 20037, USA
| | - Ian Toma
- Division of Genomic Medicine, Department of Medicine, The George Washington University Medical Center, Washington, DC, 20037, USA.,True Bearing Diagnostics, Washington, DC, 20037, USA
| | - Tisha Jepson
- Division of Genomic Medicine, Department of Medicine, The George Washington University Medical Center, Washington, DC, 20037, USA.,True Bearing Diagnostics, Washington, DC, 20037, USA
| | - Shiyu Shu
- Department of Biostatistics, The George Washington University Milken School of Public Health, Washington, DC, 20037, USA
| | - Yan Ma
- Department of Biostatistics, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Timothy A McCaffrey
- Division of Genomic Medicine, Department of Medicine, The George Washington University Medical Center, Washington, DC, 20037, USA.,True Bearing Diagnostics, Washington, DC, 20037, USA
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Cheung F, Apps R, Dropulic L, Kotliarov Y, Chen J, Jordan T, Langweiler M, Candia J, Biancotto A, Han KL, Rachmaninoff N, Pietz H, Wang K, Tsang JS, Cohen JI. Sex and prior exposure jointly shape innate immune responses to a live herpesvirus vaccine. eLife 2023; 12:80652. [PMID: 36648132 PMCID: PMC9844983 DOI: 10.7554/elife.80652] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 12/02/2022] [Indexed: 01/11/2023] Open
Abstract
Background Both sex and prior exposure to pathogens are known to influence responses to immune challenges, but their combined effects are not well established in humans, particularly in early innate responses critical for shaping subsequent outcomes. Methods We employed systems immunology approaches to study responses to a replication-defective, herpes simplex virus (HSV) 2 vaccine in men and women either naive or previously exposed to HSV. Results Blood transcriptomic and cell population profiling showed substantial changes on day 1 after vaccination, but the responses depended on sex and whether the vaccinee was naive or previously exposed to HSV. The magnitude of early transcriptional responses was greatest in HSV naive women where type I interferon (IFN) signatures were prominent and associated negatively with vaccine-induced neutralizing antibody titers, suggesting that a strong early antiviral response reduced the uptake of this replication-defective virus vaccine. While HSV seronegative vaccine recipients had upregulation of gene sets in type I IFN (IFN-α/β) responses, HSV2 seropositive vaccine recipients tended to have responses focused more on type II IFN (IFN-γ) genes. Conclusions These results together show that prior exposure and sex interact to shape early innate responses that then impact subsequent adaptive immune phenotypes. Funding Intramural Research Program of the NIH, the National Institute of Allergy and Infectious Diseases, and other institutes supporting the Trans-NIH Center for Human Immunology, Autoimmunity, and Inflammation. The vaccine trial was supported through a clinical trial agreement between the National Institute of Allergy and Infectious Diseases and Sanofi Pasteur. Clinical trial number: NCT01915212.
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Affiliation(s)
- Foo Cheung
- Center for Human Immunology, National Institutes of HealthBethesdaUnited States
| | - Richard Apps
- Center for Human Immunology, National Institutes of HealthBethesdaUnited States
| | - Lesia Dropulic
- Medical Virology Section, Laboratory of Infectious Diseases, National Institutes of HealthBethesdaUnited States
| | - Yuri Kotliarov
- Center for Human Immunology, National Institutes of HealthBethesdaUnited States
| | - Jinguo Chen
- Center for Human Immunology, National Institutes of HealthBethesdaUnited States
| | - Tristan Jordan
- Medical Virology Section, Laboratory of Infectious Diseases, National Institutes of HealthBethesdaUnited States
| | - Marc Langweiler
- Center for Human Immunology, National Institutes of HealthBethesdaUnited States
| | - Julian Candia
- Center for Human Immunology, National Institutes of HealthBethesdaUnited States
| | - Angelique Biancotto
- Center for Human Immunology, National Institutes of HealthBethesdaUnited States
| | - Kyu Lee Han
- Center for Human Immunology, National Institutes of HealthBethesdaUnited States
| | - Nicholas Rachmaninoff
- Multiscale Systems Biology Section, Laboratory of Immune System Biology, National Institutes of HealthBethesdaUnited States
| | - Harlan Pietz
- Medical Virology Section, Laboratory of Infectious Diseases, National Institutes of HealthBethesdaUnited States
| | - Kening Wang
- Medical Virology Section, Laboratory of Infectious Diseases, National Institutes of HealthBethesdaUnited States
| | - John S Tsang
- Center for Human Immunology, National Institutes of HealthBethesdaUnited States
- Multiscale Systems Biology Section, Laboratory of Immune System Biology, National Institutes of HealthBethesdaUnited States
| | - Jeffrey I Cohen
- Medical Virology Section, Laboratory of Infectious Diseases, National Institutes of HealthBethesdaUnited States
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3
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Jordan T, Chen J, Li N, Burette S, Culton D, Geng S, Googe P, Thomas N, Diaz L, Liu Z. 050 Eotaxin-1 and matrix metalloproteinase-9 are critical in anti-BP180 IgE-induced experimental bullous pemphigoid. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Hough S, Alićehajić-Bečić Ð, Pederson A, Jordan T, Sharif F, Lakhi R, Maynard-Connor E, Knagg T. 966 IMPROVING COMMUNICATION WITH RELATIVES IN THE COVID ERA - DEVELOPMENT OF A NEW SERVICE STANDARD. Age Ageing 2022. [DOI: 10.1093/ageing/afac126.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Quality improvement project undertaken by the Ageing and Complex Medicine team to improve the quality and quantity of communication with patients’ relatives.
Introduction
Visitation restrictions at RAEI since the onset of the COVID pandemic have created barriers to effective communication between patients’ relatives and the medical team. Patients’ relatives were frequently receiving poorly structured information, incorrect information, or even no information. This problem was hospital wide and likely to have affected other trusts. It particularly affected elderly care wards, where the cohort of patients were often less able provide their relatives with updates themselves. We therefore agreed a service standard whereby the medical team would provide a medical update via phone to the patients’ next of kin within 24 hours of admission followed by twice weekly updates by any member of the wider MDT. Our aim was to improve the quality and quantity of communication with the patients’ relatives.
Method
So far 6 data capture cycles have seen us implement change in various ways such as utilisation of a white board to highlight when updates are due, a staff feedback survey to highlight barriers to providing the service and a relative feedback survey to evaluate their experience.
Results
Compared to baseline data we have seen an improvement in the quantity of relative updates with most cycles.
Conclusion
We have improved the quantity of relative updates and embedded it as established culture on Astley ward. Barriers to success include staffing levels, time burden, and low confidence levels amongst junior doctors. Cycle 7 will see implementation of a teaching session for new junior doctor cohorts to improve their confidence. I would like to share our learning and success with the wider hospital and see implementation of the service standard across all wards within the trust.
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Affiliation(s)
- S Hough
- Department of Ageing and Complex Medicine, Royal Albert Edward Infirmary (RAEI)
| | - Ð Alićehajić-Bečić
- Department of Ageing and Complex Medicine, Royal Albert Edward Infirmary (RAEI)
| | - A Pederson
- Department of Ageing and Complex Medicine, Royal Albert Edward Infirmary (RAEI)
| | - T Jordan
- Department of Ageing and Complex Medicine, Royal Albert Edward Infirmary (RAEI)
| | - F Sharif
- Department of Ageing and Complex Medicine, Royal Albert Edward Infirmary (RAEI)
| | - R Lakhi
- Department of Ageing and Complex Medicine, Royal Albert Edward Infirmary (RAEI)
| | - E Maynard-Connor
- Department of Ageing and Complex Medicine, Royal Albert Edward Infirmary (RAEI)
| | - T Knagg
- Department of Ageing and Complex Medicine, Royal Albert Edward Infirmary (RAEI)
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5
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Victor J, Jordan T, Lamkin E, Ikeh K, March A, Frere J, Crompton A, Allen L, Fanning J, Lim WY, Muoio D, Fouquerel E, Martindale R, Dewitt J, deLance N, Taatjes D, Dragon J, Holcombe R, Greenblatt M, Kaminsky D, Hong J, Zhou P, tenOever B, Chatterjee N. SARS-CoV-2 hijacks host cell genome instability pathways. Res Sq 2022:rs.3.rs-1556634. [PMID: 35441168 PMCID: PMC9016650 DOI: 10.21203/rs.3.rs-1556634/v1] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The repertoire of coronavirus disease 2019 (COVID-19)-mediated adverse health outcomes has continued to expand in infected patients, including the susceptibility to developing long-COVID; however, the molecular underpinnings at the cellular level are poorly defined. In this study, we report that SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) infection triggers host cell genome instability by modulating the expression of molecules of DNA repair and mutagenic translesion synthesis. Further, SARS-CoV-2 infection causes genetic alterations, such as increased mutagenesis, telomere dysregulation, and elevated microsatellite instability (MSI). The MSI phenotype was coupled to reduced MLH1, MSH6, and MSH2 in infected cells. Strikingly, pre-treatment of cells with the REV1-targeting translesion DNA synthesis inhibitor, JH-RE-06, suppresses SARS-CoV-2 proliferation and dramatically represses the SARS-CoV-2-dependent genome instability. Mechanistically, JH-RE-06 treatment induces autophagy, which we hypothesize limits SARS-CoV-2 proliferation and, therefore, the hijacking of host-cell genome instability pathways. These results have implications for understanding the pathobiological consequences of COVID-19.
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6
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Si L, Bai H, Rodas M, Cao W, Oh CY, Jiang A, Moller R, Hoagland D, Oishi K, Horiuchi S, Uhl S, Blanco-Melo D, Albrecht RA, Liu WC, Jordan T, Nilsson-Payant BE, Golynker I, Frere J, Logue J, Haupt R, McGrath M, Weston S, Zhang T, Plebani R, Soong M, Nurani A, Kim SM, Zhu DY, Benam KH, Goyal G, Gilpin SE, Prantil-Baun R, Gygi SP, Powers RK, Carlson KE, Frieman M, tenOever BR, Ingber DE. A human-airway-on-a-chip for the rapid identification of candidate antiviral therapeutics and prophylactics. Nat Biomed Eng 2021; 5:815-829. [PMID: 33941899 PMCID: PMC8387338 DOI: 10.1038/s41551-021-00718-9] [Citation(s) in RCA: 174] [Impact Index Per Article: 58.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 03/19/2021] [Indexed: 02/05/2023]
Abstract
The rapid repurposing of antivirals is particularly pressing during pandemics. However, rapid assays for assessing candidate drugs typically involve in vitro screens and cell lines that do not recapitulate human physiology at the tissue and organ levels. Here we show that a microfluidic bronchial-airway-on-a-chip lined by highly differentiated human bronchial-airway epithelium and pulmonary endothelium can model viral infection, strain-dependent virulence, cytokine production and the recruitment of circulating immune cells. In airway chips infected with influenza A, the co-administration of nafamostat with oseltamivir doubled the treatment-time window for oseltamivir. In chips infected with pseudotyped severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), clinically relevant doses of the antimalarial drug amodiaquine inhibited infection but clinical doses of hydroxychloroquine and other antiviral drugs that inhibit the entry of pseudotyped SARS-CoV-2 in cell lines under static conditions did not. We also show that amodiaquine showed substantial prophylactic and therapeutic activities in hamsters challenged with native SARS-CoV-2. The human airway-on-a-chip may accelerate the identification of therapeutics and prophylactics with repurposing potential.
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Affiliation(s)
- Longlong Si
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Haiqing Bai
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Melissa Rodas
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Wuji Cao
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Crystal Yuri Oh
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Amanda Jiang
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
- Vascular Biology Program and Department of Surgery, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA
| | - Rasmus Moller
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Daisy Hoagland
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Kohei Oishi
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Shu Horiuchi
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Skyler Uhl
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Daniel Blanco-Melo
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Randy A Albrecht
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Wen-Chun Liu
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Tristan Jordan
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Ilona Golynker
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Justin Frere
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - James Logue
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Robert Haupt
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Marisa McGrath
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Stuart Weston
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Tian Zhang
- Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Roberto Plebani
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
- Center on Advanced Studies and Technology (CAST), Department of Medical, Oral and Biotechnological Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Mercy Soong
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Atiq Nurani
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Seong Min Kim
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Danni Y Zhu
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Kambez H Benam
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Girija Goyal
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Sarah E Gilpin
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Rachelle Prantil-Baun
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Steven P Gygi
- Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Rani K Powers
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Kenneth E Carlson
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Matthew Frieman
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Benjamin R tenOever
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Donald E Ingber
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA.
- Vascular Biology Program and Department of Surgery, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA.
- Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA, USA.
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7
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Ho JSY, Mok BWY, Campisi L, Jordan T, Yildiz S, Parameswaran S, Wayman JA, Gaudreault NN, Meekins DA, Indran SV, Morozov I, Trujillo JD, Fstkchyan YS, Rathnasinghe R, Zhu Z, Zheng S, Zhao N, White K, Ray-Jones H, Malysheva V, Thiecke MJ, Lau SY, Liu H, Zhang AJ, Lee ACY, Liu WC, Jangra S, Escalera A, Aydillo T, Melo BS, Guccione E, Sebra R, Shum E, Bakker J, Kaufman DA, Moreira AL, Carossino M, Balasuriya UBR, Byun M, Albrecht RA, Schotsaert M, Garcia-Sastre A, Chanda SK, Miraldi ER, Jeyasekharan AD, TenOever BR, Spivakov M, Weirauch MT, Heinz S, Chen H, Benner C, Richt JA, Marazzi I. TOP1 inhibition therapy protects against SARS-CoV-2-induced lethal inflammation. Cell 2021; 184:2618-2632.e17. [PMID: 33836156 PMCID: PMC8008343 DOI: 10.1016/j.cell.2021.03.051] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [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: 12/01/2020] [Revised: 02/05/2021] [Accepted: 03/24/2021] [Indexed: 12/29/2022]
Abstract
The ongoing pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is currently affecting millions of lives worldwide. Large retrospective studies indicate that an elevated level of inflammatory cytokines and pro-inflammatory factors are associated with both increased disease severity and mortality. Here, using multidimensional epigenetic, transcriptional, in vitro, and in vivo analyses, we report that topoisomerase 1 (TOP1) inhibition suppresses lethal inflammation induced by SARS-CoV-2. Therapeutic treatment with two doses of topotecan (TPT), an FDA-approved TOP1 inhibitor, suppresses infection-induced inflammation in hamsters. TPT treatment as late as 4 days post-infection reduces morbidity and rescues mortality in a transgenic mouse model. These results support the potential of TOP1 inhibition as an effective host-directed therapy against severe SARS-CoV-2 infection. TPT and its derivatives are inexpensive clinical-grade inhibitors available in most countries. Clinical trials are needed to evaluate the efficacy of repurposing TOP1 inhibitors for severe coronavirus disease 2019 (COVID-19) in humans.
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Affiliation(s)
- Jessica Sook Yuin Ho
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Bobo Wing-Yee Mok
- Department of Microbiology and State Key Laboratory for Emerging Infectious Diseases, Li Ka Shing Faculty of Medicine (HKUMed), The University of Hong Kong, Hong Kong
| | - Laura Campisi
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Tristan Jordan
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Soner Yildiz
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Sreeja Parameswaran
- Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Joseph A Wayman
- Divisions of Immunobiology and Biomedical Informatics, Cincinnati Children's Hospital, Cincinnati, OH 45229, USA; Department of Pediatrics, University of Cincinnati, College of Medicine, Cincinnati, OH 45229, USA
| | - Natasha N Gaudreault
- Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, 1800 Denison Avenue, Manhattan, KS 66506, USA
| | - David A Meekins
- Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, 1800 Denison Avenue, Manhattan, KS 66506, USA
| | - Sabarish V Indran
- Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, 1800 Denison Avenue, Manhattan, KS 66506, USA
| | - Igor Morozov
- Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, 1800 Denison Avenue, Manhattan, KS 66506, USA
| | - Jessie D Trujillo
- Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, 1800 Denison Avenue, Manhattan, KS 66506, USA
| | - Yesai S Fstkchyan
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Raveen Rathnasinghe
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Zeyu Zhu
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Simin Zheng
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Nan Zhao
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Kris White
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Helen Ray-Jones
- MRC London Institute of Medical Sciences, London W12 0NN, UK
| | | | | | - Siu-Ying Lau
- Department of Microbiology and State Key Laboratory for Emerging Infectious Diseases, Li Ka Shing Faculty of Medicine (HKUMed), The University of Hong Kong, Hong Kong
| | - Honglian Liu
- Department of Microbiology and State Key Laboratory for Emerging Infectious Diseases, Li Ka Shing Faculty of Medicine (HKUMed), The University of Hong Kong, Hong Kong
| | - Anna Junxia Zhang
- Department of Microbiology and State Key Laboratory for Emerging Infectious Diseases, Li Ka Shing Faculty of Medicine (HKUMed), The University of Hong Kong, Hong Kong
| | - Andrew Chak-Yiu Lee
- Department of Microbiology and State Key Laboratory for Emerging Infectious Diseases, Li Ka Shing Faculty of Medicine (HKUMed), The University of Hong Kong, Hong Kong
| | - Wen-Chun Liu
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Sonia Jangra
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Alba Escalera
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Teresa Aydillo
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Betsaida Salom Melo
- Department of Genetics and Genomics, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Icahn Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ernesto Guccione
- Tisch Cancer Institute, Department of Oncological Sciences and Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Robert Sebra
- Department of Genetics and Genomics, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Icahn Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Sema4, a Mount Sinai venture, Stamford, CT, USA; Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Elaine Shum
- Division of Medical Oncology and Hematology, NYU Langone Perlmutter Cancer Center, New York, NY 10016, USA
| | - Jan Bakker
- Pontificia Universidad Católica de Chile, Santiago, Chile; Erasmus MC University Medical Center Rotterdam, Rotterdam, the Netherlands; Editor in Chief, Journal of Critical Care, NYU School of Medicine, Columbia University College of Physicians & Surgeons, New York, NY, USA
| | - David A Kaufman
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, NYU School of Medicine, New York, NY, USA
| | - Andre L Moreira
- Department of Pathology, New York University School of Medicine, New York, NY, USA
| | - Mariano Carossino
- Louisiana Animal Disease Diagnostic Laboratory and Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - Udeni B R Balasuriya
- Louisiana Animal Disease Diagnostic Laboratory and Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - Minji Byun
- Department of Medicine, Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Randy A Albrecht
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Michael Schotsaert
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Adolfo Garcia-Sastre
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Tisch Cancer Institute, Department of Oncological Sciences and Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1124, New York, NY 10029, USA
| | - Sumit K Chanda
- Immunity and Pathogenesis Program, Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Emily R Miraldi
- Divisions of Immunobiology and Biomedical Informatics, Cincinnati Children's Hospital, Cincinnati, OH 45229, USA; Department of Pediatrics, University of Cincinnati, College of Medicine, Cincinnati, OH 45229, USA
| | - Anand D Jeyasekharan
- Department of Haematology-Oncology, National University Hospital and Cancer Science Institute of Singapore, National University of Singapore, 117599 Singapore, Singapore
| | - Benjamin R TenOever
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Virus Engineering Center for Therapeutics and Research, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Matthew T Weirauch
- Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; Department of Pediatrics, University of Cincinnati, College of Medicine, Cincinnati, OH 45229, USA; Divisions of Biomedical Informatics and Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Sven Heinz
- Department of Medicine, School of Medicine, University of California, San Diego, La Jolla, CA 92092, USA
| | - Honglin Chen
- Department of Microbiology and State Key Laboratory for Emerging Infectious Diseases, Li Ka Shing Faculty of Medicine (HKUMed), The University of Hong Kong, Hong Kong
| | - Christopher Benner
- Department of Medicine, School of Medicine, University of California, San Diego, La Jolla, CA 92092, USA
| | - Juergen A Richt
- Center of Excellence for Emerging and Zoonotic Animal Diseases (CEEZAD), Kansas State University, Manhattan, KS, USA; Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, 1800 Denison Avenue, Manhattan, KS 66506, USA
| | - Ivan Marazzi
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
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Yuin Ho JS, Wing-Yee Mok B, Campisi L, Jordan T, Yildiz S, Parameswaran S, Wayman JA, Gaudreault NN, Meekins DA, Indran SV, Morozov I, Trujillo JD, Fstkchyan YS, Rathnasinghe R, Zhu Z, Zheng S, Zhao N, White K, Ray-Jones H, Malysheva V, Thiecke MJ, Lau SY, Liu H, Junxia Zhang A, Chak-Yiu Lee A, Liu WC, Aydillo T, Salom Melo B, Guccione E, Sebra R, Shum E, Bakker J, Kaufman DA, Moreira AL, Carossino M, Balasuriya UBR, Byun M, Miraldi ER, Albrecht RA, Schotsaert M, Garcia-Sastre A, Chanda SK, Jeyasekharan AD, TenOever BR, Spivakov M, Weirauch MT, Heinz S, Chen H, Benner C, Richt JA, Marazzi I. Topoisomerase 1 inhibition therapy protects against SARS-CoV-2-induced inflammation and death in animal models. bioRxiv 2020. [PMID: 33299999 DOI: 10.1101/2020.12.01.404483] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The ongoing pandemic caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is currently affecting millions of lives worldwide. Large retrospective studies indicate that an elevated level of inflammatory cytokines and pro-inflammatory factors are associated with both increased disease severity and mortality. Here, using multidimensional epigenetic, transcriptional, in vitro and in vivo analyses, we report that Topoisomerase 1 (Top1) inhibition suppresses lethal inflammation induced by SARS-CoV-2. Therapeutic treatment with two doses of Topotecan (TPT), a FDA-approved Top1 inhibitor, suppresses infection-induced inflammation in hamsters. TPT treatment as late as four days post-infection reduces morbidity and rescues mortality in a transgenic mouse model. These results support the potential of Top1 inhibition as an effective host-directed therapy against severe SARS-CoV-2 infection. TPT and its derivatives are inexpensive clinical-grade inhibitors available in most countries. Clinical trials are needed to evaluate the efficacy of repurposing Top1 inhibitors for COVID-19 in humans.
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Jordan T, Ngo B, Jones CA. The use of cannabis and perceptions of its effect on fertility among infertility patients. Hum Reprod Open 2020; 2020:hoz041. [PMID: 32072021 PMCID: PMC7016357 DOI: 10.1093/hropen/hoz041] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 11/21/2019] [Accepted: 11/27/2019] [Indexed: 01/08/2023] Open
Abstract
STUDY QUESTION What is the prevalence of cannabis use and the perceptions of its impact on fertility among infertility patients? SUMMARY ANSWER A total of 13% of infertility patients used cannabis within the last year, and current usage is associated with patient perceptions of negative effects of cannabis on fertility and pregnancy. WHAT IS KNOWN ALREADY Cannabis use is increasing among the general population and pregnant women, particularly in places where cannabis use is legal despite having known and potential negative effects on fertility and pregnancy. STUDY DESIGN, SIZE, DURATION A cross-sectional patient survey study was performed between July 2017 and September 2017. Patients attending a university-affiliated hospital-based fertility clinic (n = 290) were invited to complete a written survey. Inclusion criteria were limited to the ability to read English. There were no exclusion criteria. PARTICIPANTS/MATERIALS, SETTING, METHODS Of the 290 patients approached, 270 (93%) agreed to participate. The questions covered demographics, cannabis usage, perceptions of the effect of cannabis on fertility and pregnancy, cessation of use due to infertility and personal history of disclosing cannabis use to healthcare providers (HCP). MAIN RESULTS AND THE ROLE OF CHANCE The results showed that 13% of respondents disclosed use of cannabis in the past year (past year users) and 38% had not used cannabis in the past year but had previously used cannabis (>1 year users) while 49% had never used cannabis (never users). Baseline demographics were similar for the three groups, but across four measures of fertility and pregnancy health, past-year users perceived less of a negative effect compared to >1 year users, and never users (P values of 0.02, 0.03, 0.01, <0.001 for questions on pregnancy, offspring health, male fertility and female fertility, respectively). Of past year users, 72% said they had or would disclose use to their HCP, but only 9.4% reported that their HCP had actually instructed them to discontinue use. LIMITATIONS, REASONS FOR CAUTION Self-reported patient surveys are subject to reporting bias and may not reflect actual use and perceptions. WIDER IMPLICATIONS OF THE FINDINGS This study suggests that cannabis use is common among infertility patients. Given the known negative impacts of cannabis on pregnancy, the authors would have expected informed infertility patients to cease cannabis use as part of their efforts to conceive. As the prevalence of cannabis use in the last year among infertility patients is similar to that in the general Canadian population, it is unclear whether the prevalence of cannabis use in the sample population merely reflects the average usage in society or, after taking into account those who reduced their usage to improve their fertility, is a factor contributing to infertility and thus prompting fertility referral. Given concern about the potential negative impact of cannabis use on fertility, and that only 9% of past year users had been instructed by an HCP to cease cannabis use, HCPs should consider the benefits of counselling about cannabis cessation for patients who are attempting to conceive. Future research should focus on analysing the effects of cannabis use on female fertility and determining whether a reduction in use among patients with infertility can improve conception rates. STUDY FUNDING/COMPETING INTEREST(S) Michelle Shin, Clinical Research Associate, is supported by the University of Toronto GREI Fellowship Fund, which is sponsored by unrestricted research grants from EMD Serono, Merck Canada and Ferring Pharmaceuticals. The authors have no potential conflicts of interest to disclose.
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Affiliation(s)
- T Jordan
- Department of Obstetrics and Gynaecology, University of Toronto, 123 Edward Street, Suite 1200, Toronto, Ontario, Canada, M5G 1E2
| | - B Ngo
- Division of Gastroenterology, Department of Hepatology and Nutrition, Hospital for Sick Children, 555 University Avenue, Toronto, Ontario, Canada, M5G 1X8
| | - C A Jones
- Department of Obstetrics and Gynaecology, University of Toronto, 123 Edward Street, Suite 1200, Toronto, Ontario, Canada, M5G 1E2.,Sinai Health System, Mount Sinai Fertility, 250 Dundas Street West, Suite 700, Toronto, Ontario, Canada, M5T 2Z5
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Klabunde M, Juszczak H, Jordan T, Baker JM, Bruno J, Carrion V, Reiss AL. Functional neuroanatomy of interoceptive processing in children and adolescents: a pilot study. Sci Rep 2019; 9:16184. [PMID: 31700095 PMCID: PMC6838093 DOI: 10.1038/s41598-019-52776-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 01/16/2019] [Accepted: 10/23/2019] [Indexed: 01/16/2023] Open
Abstract
In adults, interoception – the sense of the physiological condition of the body - appears to influence emotion processing, cognition, behavior and various somatic and mental health disorders. Adults demonstrate frontal-insula-parietal-anterior cingulate cortex activation during the heartbeat detection task, a common interoceptive measure. Little, however, is known about the functional neuroanatomy underlying interoception in children. The current pilot study examined interoceptive processing in children and adolescents with fMRI while using the heartbeat detection task. Our main findings demonstrate that children as young as the age of six activate the left insula, cuneus, inferior parietal lobule and prefrontal regions. These findings are similar to those in adults when comparing heartbeat and tone detection conditions. Age was associated with increased activation within the dACC, orbital frontal cortex and the mid-inferior frontal gyri. Thus, our pilot study may provide important information about the neurodevelopment of interoceptive processing abilities in children and a task for future interoception neuroimaging studies in children.
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Affiliation(s)
- M Klabunde
- Centre for Brain Sciences, Department of Psychology, University of Essex, Wivenhoe Park, United Kingdom.
| | - H Juszczak
- University of California, San Francisco Medical Center, San Francisco, USA
| | - T Jordan
- Center for Interdisciplinary Brain Sciences Research, Division of Interdisciplinary Brain Sciences, Department of Psychiatry and Behavioral Sciences, School of Medicine, Stanford University, Stanford, USA
| | - J M Baker
- Center for Interdisciplinary Brain Sciences Research, Division of Interdisciplinary Brain Sciences, Department of Psychiatry and Behavioral Sciences, School of Medicine, Stanford University, Stanford, USA
| | - J Bruno
- Center for Interdisciplinary Brain Sciences Research, Division of Interdisciplinary Brain Sciences, Department of Psychiatry and Behavioral Sciences, School of Medicine, Stanford University, Stanford, USA
| | - V Carrion
- Division of Child and Adolescent Psychiatry, Department of Psychiatry and Behavioral Sciences, School of Medicine, Stanford University, Stanford, USA
| | - A L Reiss
- Center for Interdisciplinary Brain Sciences Research, Division of Interdisciplinary Brain Sciences, Department of Psychiatry and Behavioral Sciences, School of Medicine, Stanford University, Stanford, USA.,Department of Radiology, School of Medicine, Stanford University, Stanford, USA.,Department of Pediatrics, School of Medicine, Stanford University, Stanford, USA
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Jordan T, Popovič P, Rotovnik Kozjek N. MON-PO362: Vitamin D and Liver Steatosis in Patients with Chronic Intestinal Failure on Home Parenteral Nutrition. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32196-x] [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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Jordan T, Califano R, Coote J, Falk S, Harris M, Mistry H, Taylor P, Woolf D, Faivre-Finn C. PRO-CTCAE vs REQUITE: a comparison of two patient reported outcome (PRO) measurement tools in a lung cancer population. Lung Cancer 2019. [DOI: 10.1016/s0169-5002(19)30189-8] [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: 11/12/2022]
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Buchheit K, Altantzis C, Bakshi A, Jordan T, Van Essendelft D. The BubbleTree toolset: CFD-integrated algorithm for Lagrangian tracking and rigorous statistical analysis of bubble motion and gas fluxes for application to 3D fluidized bed simulations. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2018.07.053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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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Graham D, Jordan T, Tinsley N, Aruketty S, Vickers A, Kelly C, Kurup R, White A, Smith A, Walsh A, Thomson C, O'Reilly S, Norfolk M, Chang D, Blackhall F, Summers Y, Califano R, Taylor P, Thistlethwaite F, Cook N, Carter L, Krebs M. P1.01-26 Single-Centre Experience of Clinical Outcomes for Advanced Lung Cancer Patients in Phase I Clinical Trials. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.582] [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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Cavka L, Jordan T, Perme M, Popuri K, Seruga B, Kozjek N. Association between various nutritional status assessment parameters in men with metastatic castrate-resistant prostate cancer (mCRPC). Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1809] [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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Jordan T, Popovič P, Rotovnik Kozjek N. Prevalence of liver steatosis in patients with chronic intestinal failure. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1687] [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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Salas I, Herrera C, Luque JA, Delgado J, Urrutia J, Jordan T. Recent climatic events controlling the hydrological and the aquifer dynamics at arid areas: The case of Huasco River watershed, northern Chile. Sci Total Environ 2016; 571:178-194. [PMID: 27471983 DOI: 10.1016/j.scitotenv.2016.07.132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 07/15/2016] [Accepted: 07/18/2016] [Indexed: 06/06/2023]
Abstract
The investigation assesses the influence of recent climatic events in the water resources and the aquifer dynamics in the Huasco watershed by means of the analysis of precipitation, streamflow and piezometric levels during the last 50years. These hydrological and hydrogeological parameters were evaluated by an exploratory geostatistical analysis (semivariogram) and a spectral analysis (periodogram). Specifically, the hydrological and hydrogeological data analyses are organized according to three sub-basins, the Del Carmen River (Section I), the El Tránsito River (Section II), and the Huasco River (Section III). Data ranges for rainfall are from 1961 to 2015, for streamflow from 1964 to 2015, and for groundwater levels from 1969 to 2014, available from Water Authority of Chile. The analyses allowed the identification of cycles in the hydrological and hydrogeological records. The study area is located in a transient climatic fringe where the convergence of several climatic systems can be identified in the hydrological and hydrogeological records. Results indicate that the nival areas and the small glaciers are especially important to the recharge processes in the Huasco watershed during the spring-summer snowmelting. Water reservoirs in the main aquifer (Section III) and in the Santa Juana dam are highly sensitive to ENSO oscillation climatic patterns. The main climatic events that control this record are the El Niño and La Niña events. In addition, the climatic influence of the westerlies and the SE extratropical moisture were also identified. Spectral analysis identified the presence of a 22.9-yearcycle in piezometric levels of the alluvial aquifer of the Huasco River. This cycle is consistent with the 22-year Hale solar cycle, suggesting the existence of a solar forcing controlling the ENSO oscillations. Moreover, semivariogram and spectral analysis identified a 10.65-yearcycle and a 9.2-yearcycle in groundwater, respectively, which were attributed to the strong mode of ENSO oscillations.
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Affiliation(s)
- I Salas
- Department of Mining Engineering, Universidad de Antofagasta, Antofagasta, Chile; Departamento de Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile
| | - C Herrera
- Departamento de Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile; CEITSAZA - Centro de Investigación Tecnológica del Agua en el Desierto, Universidad Católica del Norte, Antofagasta, Chile.
| | - J A Luque
- Departamento de Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile; CEITSAZA - Centro de Investigación Tecnológica del Agua en el Desierto, Universidad Católica del Norte, Antofagasta, Chile
| | - J Delgado
- Department of Mining Engineering, Universidad de Antofagasta, Antofagasta, Chile
| | - J Urrutia
- Departamento de Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile; CEITSAZA - Centro de Investigación Tecnológica del Agua en el Desierto, Universidad Católica del Norte, Antofagasta, Chile
| | - T Jordan
- Department of Earth & Atmospheric Sciences and Atkinson Center for a Sustainable Future, Snee Hall, Cornell University, Ithaca, NY 14853-150 4, USA
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Herkommer K, Dinkel A, Gschwend J, Jordan T. HP-01-002 The impact of age difference between the patient and his female partner on the couple's sexual life after bilateral nerve sparing radical prostatectomy. J Sex Med 2016. [DOI: 10.1016/j.jsxm.2016.03.099] [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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Navarro C, Thippu Jayaprakash K, Dymond S, Chris S, Turner L, Shaffer R, Adams E, Nisbet A, Jordan T. EP-1706: Evaluation of different radiosurgical planning techniques using iPlan®. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32957-7] [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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Scheinert M, Ferraccioli F, Schwabe J, Bell R, Studinger M, Damaske D, Jokat W, Aleshkova N, Jordan T, Leitchenkov G, Blankenship DD, Damiani TM, Young D, Cochran JR, Richter TD. New Antarctic Gravity Anomaly Grid for Enhanced Geodetic and Geophysical Studies in Antarctica. Geophys Res Lett 2016; 43:600-610. [PMID: 29326484 PMCID: PMC5759340 DOI: 10.1002/2015gl067439] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Gravity surveying is challenging in Antarctica because of its hostile environment and inaccessibility. Nevertheless, many ground-based, airborne and shipborne gravity campaigns have been completed by the geophysical and geodetic communities since the 1980s. We present the first modern Antarctic-wide gravity data compilation derived from 13 million data points covering an area of 10 million km2, which corresponds to 73% coverage of the continent. The remove-compute-restore technique was applied for gridding, which facilitated levelling of the different gravity datasets with respect to an Earth Gravity Model derived from satellite data alone. The resulting free-air and Bouguer gravity anomaly grids of 10 km resolution are publicly available. These grids will enable new high-resolution combined Earth Gravity Models to be derived and represent a major step forward towards solving the geodetic polar data gap problem. They provide a new tool to investigate continental-scale lithospheric structure and geological evolution of Antarctica.
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Affiliation(s)
- M. Scheinert
- Institut für Planetare Geodäsie, Technische Universität Dresden, Dresden, Germany
| | - F. Ferraccioli
- British Antarctic Survey, High Cross, Madingley Road, Cambridge, UK
| | - J. Schwabe
- Institut für Planetare Geodäsie, Technische Universität Dresden, Dresden, Germany
| | - R. Bell
- Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA
| | | | - D. Damaske
- Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover, Germany
| | - W. Jokat
- Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany
- University of Bremen, Geoscience, Department, Bremen, Germany
| | | | - T. Jordan
- British Antarctic Survey, High Cross, Madingley Road, Cambridge, UK
| | - G. Leitchenkov
- VNIIOkeangeologia, St. Petersburg, Russia
- St. Petersburg State University, St. Petersburg, Russia
| | - D. D. Blankenship
- Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, TX, USA
| | - T. M. Damiani
- National Geodetic Survey, NOAA, Silver Spring, MD, USA
| | - D. Young
- Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, TX, USA
| | - J. R. Cochran
- Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA
| | - T. D. Richter
- Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, TX, USA
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Dachsel RM, Dachsel R, Domke S, Groß T, Schubert O, Kotrini L, Ladegast K, Vogel J, Jordan T, Zawade S. [Optic neuropathy after retrobulbar neuritis in multiple sclerosis: are optical coherence tomography and magnetic resonance imaging useful and necessary follow-up parameters?]. Nervenarzt 2015; 86:187-196. [PMID: 25645891 DOI: 10.1007/s00115-014-4241-1] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND This study evaluated whether progressive optic neuropathy (ON) is commonly found after retrobulbar neuritis and whether optical coherence tomography (OCT) is a useful tool for follow-up of patients with multiple sclerosis (MS). METHODS An observational study of 86 MS patients (currently treated with immunomodulation) with a past medical history of ON was carried out. Patients were assessed in 2010 and 2012 using the expanded disability status scale (EDSS), visual acuity, visual evoked potentials (VEP) and OCT but magnetic resonance imaging (MRI) was performed only in 2012. RESULTS In this study 16 men and 70 women with a mean age of 41.6 and 43.8 years, respectively, were evaluated (28 patients post bilateral and 58 patients post unilateral ON including 114 eyes post-ON and 58 eyes without previous ON). Visual acuity and VEPs improved or remained the same over the study period. Visual acuity, VEPs, retinal nerve fiber layer (RNFL) thickness and macular volume were significantly worse in eyes post-ON compared to eyes without previous ON. The RNFL significantly decreased over the study period in eyes post-ON from an average of 79.9 ± 13.3 μm to 77.0 ± 12.9 μm (p < 0.0001) and eyes without previous ON from 89.5 ± 12.9 μm to 86.0 ± 12.5 μm (p < 0.0001). The number of VEPs and RNFL thickness were significantly correlated with visual acuity in all eyes. In patients after unilateral ON the brain atrophy parameters corpus callosum index (CCI) and cella media index (CMI) were negatively correlated with the EDSS. CONCLUSION Initially MS often begins with an episode of ON which can be stabilized by immunomodulation. A mild progressive ON was generally detectable in this study but severe progressive ON was rarely observed. The OCT measurements showed no better correlation than the VEPs with visual acuity; however, OCT can be applied for confirmation of atypical ON. The corpus callosum index seems to be best associated with the degree of disability while, as already described in the literature, the number of T2 lesions is not well correlated with disability, probably due to the small-world network function of the brain and the position of the lesions in areas with no clinical relevance.
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Affiliation(s)
- R M Dachsel
- East Surrey Hospital, Canada Avenue, Redhill, RH1 5RH, Redhill, UK,
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Grune J, Sempert K, Kuznetsov M, Jordan T. Experimental investigation of fast flame propagation in stratified hydrogen–air mixtures in semi-confined flat layers. J Loss Prev Process Ind 2013. [DOI: 10.1016/j.jlp.2013.09.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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MacIsaac KG, Best M, BRUGLER MR, Kenchington EL, Anstey LJ, Jordan T. Telopathes magna gen. nov., spec. nov. (Cnidaria: Anthozoa: Antipatharia: Schizopathidae) from deep waters off Atlantic Canada and the first molecular phylogeny of the deep-sea family Schizopathidae . Zootaxa 2013; 3700:237-58. [DOI: 10.11646/zootaxa.3700.2.3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [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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Grune J, Sempert K, Haberstroh H, Kuznetsov M, Jordan T. Experimental investigation of hydrogen–air deflagrations and detonations in semi-confined flat layers. J Loss Prev Process Ind 2013. [DOI: 10.1016/j.jlp.2011.09.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Manikam L, Richards PJ, Jordan T. An unusual finding on a pelvic radiograph. BMJ 2012; 345:e6261. [PMID: 23007625 DOI: 10.1136/bmj.e6261] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- L Manikam
- Department of Respiratory Medicine, University Hospitals of North Staffordshire NHS Trust, Stoke on Trent ST4 6QG, UK.
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Mohamed I, Jordan T, Coman M. Breast cancer survivors’ motivation to perform preventive health behaviors: An application of the protection motivation theory. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.27_suppl.251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
251 Background: Little is known about what motivates breast cancer survivors to engage in preventive health behaviors to prevent recurrence of breast cancer. The primary objective was to assess how survivors’ fear of recurrence, spirituality, and perceptions of risk and coping appraisal were associated with their motivation to perform healthy lifestyle and cancer screening behaviors. Methods: A reliable and valid questionnaire was developed. An a priori power analysis indicated that a minimum of 386 completed surveys were needed for adequate statistical power. Based on an estimated 50% return rate, the investigators randomly selected a state-wide sample of 800 survivors from Ohio. A 3-wave mailing was used to increase response rate. Results: 559 surveys were completed (72%). Respondents with higher perceived risks of recurrence were more motivated to perform healthy lifestyle behaviors than those with lower perceived risks (t=2.51, df=521, p=.039). Most (>70%) agreed that healthy lifestyle behaviors such as regular exercise reduce one’s risk of recurrence. Only 43% exercised regularly. Only 54% reported their doctor discussed how to reduce the risk of recurrence. Survivors who were satisfied with their physician’s communication exercised more regularly than those who were not satisfied (chi-square =13.09, p=.016, df=5). Cancer survivors with a high level of motivation and high level of behavioral intentions were more likely to be engaging in preventive health and cancer screening behaviors. Higher levels of spirituality were positively correlated with a higher level of motivation to engage in preventive health behaviors (r=.345, n=468, p<0.001). Conclusions: This study provides strong evidence that the Protection-Motivation Theory (PMT) helps to explain certain factors that impact survivors’ motivation and behavioral intentions to engage in healthy lifestyle behaviors and follow up screening tests. When developing programs for breast cancer survivors, health professionals should consider incorporating spirituality, fear of recurrence, and the constructs of the PMT.
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Affiliation(s)
- I. Mohamed
- University of Toledo Medical Center, Toledo, OH; University of Toledo, Toledo, OH
| | - T. Jordan
- University of Toledo Medical Center, Toledo, OH; University of Toledo, Toledo, OH
| | - M. Coman
- University of Toledo Medical Center, Toledo, OH; University of Toledo, Toledo, OH
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Koritnik B, Jordan T, Vipotnik S, Meglič NP, Zidar J. W11.4 Relationship between cortical fMRI activity and functional measures in amyotrophic lateral sclerosis. Clin Neurophysiol 2011. [DOI: 10.1016/s1388-2457(11)60123-5] [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: 11/29/2022]
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29
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Chan O, Hussein M, Worku M, Laing R, Jordan T, Pandha H, Morgan R, Short S, Nisbet A, Urbano TG. 425 poster BIOPHYSICAL ESTIMATION OF DNA DAMAGE AND SECOND CANCER RISK USING GAMMA H2AX AND TLDS IN PROSTATE CANCER IMRT. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)70547-3] [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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30
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Hussein M, Sidhu S, Clark C, Adams E, Jordan T. 1433 poster CRITICAL EVALUATION BETWEEN THE PTW SEVEN29 2D ARRAY(tm) AND SCANDIDOS DELTA4(tm) FOR DYNAMIC IMRT AND RAPIDARC(tm) VERIFICATION. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)71555-9] [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: 11/25/2022]
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31
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Lei M, Rickard D, Crawshaw J, Clark C, Adams E, Gianolini S, Jordan T, Whitaker S, Nisbet A, Urbano TG. 1162 poster FDG-PET GUIDED DOSE-PAINTING IN OROPHARYNGEAL SCC: WHAT IS THE EFFECT OF SEGMENTATION TECHNIQUE ON ESTIMATED TCP? Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)71284-1] [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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32
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Bell RE, Ferraccioli F, Creyts TT, Braaten D, Corr H, Das I, Damaske D, Frearson N, Jordan T, Rose K, Studinger M, Wolovick M. Widespread Persistent Thickening of the East Antarctic Ice Sheet by Freezing from the Base. Science 2011; 331:1592-5. [DOI: 10.1126/science.1200109] [Citation(s) in RCA: 133] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Abstract
AbstractThis paper assesses the electrical characteristics of piezoelectric wafers for use in aeronautical applications such as active noise control in aircraft. Determination of capacitive behavior and power consumption is necessary to optimize the system configuration and to design efficient driving electronics. Empirical relations are developed from experimental data to predict the capacitance and loss tangent of a PZT5A ceramic as nonlinear functions of both applied peak voltage and driving frequency. Power consumed by the PZT is the rate of energy required to excite the piezoelectric system along with power dissipated due to dielectric loss and mechanical and structural damping. Overall power consumption is thus quantified as a function of peak applied voltage and driving frequency. It was demonstrated that by incorporating the variation of capacitance and power loss with voltage and frequency, satisfactory estimates of power requirements can be obtained. These relations allow general guidelines in selection and application of piezoelectric actuators and driving electronics for active control applications.
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Collins A, Jordan T, Ledson M, Walshaw M. P192 Fibreoptic bronchoscopic insertion of the Gianturco stent for tracheobronchial obstruction in patients with cancer at a lung cancer tertiary referral centre: 20 year experience. Thorax 2010. [DOI: 10.1136/thx.2010.151043.43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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35
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Xu Z, Travis J, Breitung W, Jordan T. Verification of a dust transport model against theoretical solutions in multidimensional advection diffusion problems. Fusion Engineering and Design 2010. [DOI: 10.1016/j.fusengdes.2010.06.027] [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] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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36
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Lei M, Clark C, Adams E, Freeman K, Jamieson C, Dabbs M, Jordan T, Whitaker S, Nisbet A, Guerrero Urbano T. CBCT Evaluation of Dose-Volume Changes in Contralateral Parotid Gland during Head and Neck IG-IMRT. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1129] [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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37
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Ashish A, McShane J, Tan H, Nazreth D, Jordan T, Ledson M, Walshaw M. The effect of transmissible Pseudomonas aeruginosa strain infection on the quality of life of adult CF patients. J Cyst Fibros 2010. [DOI: 10.1016/s1569-1993(10)60383-9] [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: 11/27/2022]
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38
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Collins A, Cowperthwaite C, Dyce P, Govin B, Ashish A, Jordan T, Ledson M, Walshaw M. Use of different preparations of tobramycin solution for inhalation (TSI) in the UK. J Cyst Fibros 2010. [DOI: 10.1016/s1569-1993(10)60162-2] [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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39
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Nazareth D, Tan H, Abdul A, Jordan T, Greenwood J, Ledson M, Walshaw M. Lung function, employment and benefits in an adult CF population. J Cyst Fibros 2010. [DOI: 10.1016/s1569-1993(10)60420-1] [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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40
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Tan H, Nazareth D, Abdul A, Jordan T, Greenwood J, Ledson M, Walshaw M. Cystic fibrosis and travel insurance. J Cyst Fibros 2010. [DOI: 10.1016/s1569-1993(10)60421-3] [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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Ashish A, Nazreth D, Tan H, Jordan T, Ledson M, Walshaw M. The increased healthcare economic burden associated with chronic infection with transmissible Pseudomonas aeruginosa strains in CF. J Cyst Fibros 2010. [DOI: 10.1016/s1569-1993(10)60447-x] [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: 11/27/2022]
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42
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Xiao J, Travis J, Breitung W, Jordan T. Numerical analysis of hydrogen risk mitigation measures for support of ITER licensing. Fusion Engineering and Design 2010. [DOI: 10.1016/j.fusengdes.2009.12.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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43
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Jordan T. Longevity of alveolar macrophages allow sustained in vivo expression of the human 1-antitrypsin gene and amelioration of emphysema. Thorax 2010. [DOI: 10.1136/thx.2010.136275] [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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44
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Lei M, Crawshaw J, Jena R, Scuffham J, Rickard D, Reise S, Hatt M, Hall J, Sellinger J, Jordan T, Whitaker S, Kirkby N, Visvikis D, Nisbet A, Guerrero Urbano M. 87 poster: Biological Gross Tumour Volume (GTVB) in Head and Neck Cancer (HNC): Comparison of Automated Segmentation Tools. Radiother Oncol 2010. [DOI: 10.1016/s0167-8140(15)34506-0] [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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46
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Rasp G, Jordan T, Ostertag P, Kramer M. Aktivierung von Leukotrien C4 (LTC4) bei der allergischen Rhinitis. Laryngorhinootologie 2004. [DOI: 10.1055/s-2004-823183] [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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47
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Thwaites DI, DuSautoy AR, Jordan T, McEwen MR, Nisbet A, Nahum AE, Pitchford WG. The IPEM code of practice for electron dosimetry for radiotherapy beams of initial energy from 4 to 25 MeV based on an absorbed dose to water calibration. Phys Med Biol 2003; 48:2929-70. [PMID: 14529204 DOI: 10.1088/0031-9155/48/18/301] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This report contains the recommendations of the Electron Dosimetry Working Party of the UK Institute of Physics and Engineering in Medicine (IPEM). The recommendations consist of a code of practice for electron dosimetry for radiotherapy beams of initial energy from 4 to 25 MeV. The code is based on the absorbed dose to water calibration service for electron beams provided by the UK standards laboratory, the National Physical Laboratory (NPL). This supplies direct N(D,w) calibration factors, traceable to a calorimetric primary standard, at specified reference depths over a range of electron energies up to approximately 20 MeV. Electron beam quality is specified in terms of R(50,D), the depth in water along the beam central axis at which the dose is 50% of the maximum. The reference depth for any given beam at the NPL for chamber calibration and also for measurements for calibration of clinical beams is 0.6R(50.D) - 0.1 cm in water. Designated chambers are graphite-walled Farmer-type cylindrical chambers and the NACP- and Roos-type parallel-plate chambers. The practical code provides methods to determine the absorbed dose to water under reference conditions and also guidance on methods to transfer this dose to non-reference points and to other irradiation conditions. It also gives procedures and data for extending up to higher energies above the range where direct calibration factors are currently available. The practical procedures are supplemented by comprehensive appendices giving discussion of the background to the formalism and the sources and values of any data required. The electron dosimetry code improves consistency with the similar UK approach to megavoltage photon dosimetry, in use since 1990. It provides reduced uncertainties, approaching 1% standard uncertainty in optimal conditions, and a simpler formalism than previous air kerma calibration based recommendations for electron dosimetry.
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Affiliation(s)
- D I Thwaites
- Institute of Physics and Engineering in Medicine, Fairmount House, 230 Tadcaster Road, York YO24 1ES, UK
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48
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Krieg R, Dolensky B, Göller B, Hailfinger G, Jordan T, Messemer G, Prothmann N, Stratmanns E. Load carrying capacity of a reactor vessel head under molten core slug impact. Nuclear Engineering and Design 2003. [DOI: 10.1016/s0029-5493(03)00042-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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49
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Abstract
At the present time, the UK blood transfusion services do not screen blood donations for anti-HTLV. This presentation describes a pilot study to ascertain the feasibility of HTLV antibody screening using mini-pools and also provides an estimate of HTLV prevalence within our donor population in Scotland and Northern Ireland. The Abbott/Murex HTLV I/II GE80/81 ELISA was selected for the trial. Thirty confirmed HTLV positive library samples were tested at various dilutions and five were shown to be nonreactive at a dilution of 1:100. Residues of mini-pools (of up to 95 individual donations) prepared for HCV NAT testing were tested with the Abbott/Murex GE80/81 assay. Of 6666 mini-pools (equivalent to 570 609 donations) tested, six were repeatedly reactive. All six mini-pools were confirmed HTLV antibody positive by line immunoassay. Four were confirmed to be HTLV-I positive, one HTLV-II positive and one HTLV positive (unable to type). Dilutions (1:100) of the five HTLV "nonreactive" positive samples were included in each test plate and used to determine a grey-zone cut-off. Using this grey-zone system an additional six (0.09%) mini-pool samples gave repeatedly reactive grey-zone results, none of which were confirmed. The minimum Scottish/Irish HTLV donor prevalence was shown to be 1:95 000.
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Affiliation(s)
- B C Dow
- Scottish National Blood Transfusion Service Microbiology Reference Unit, West of Scotland Blood Transfusion Centre, 25 Shelley Road, Glasgow G12 0XB, UK.
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Lehmann OJ, El-ashry MF, Ebenezer ND, Ocaka L, Francis PJ, Wilkie SE, Patel RJ, Ficker L, Jordan T, Khaw PT, Bhattacharya SS. A novel keratocan mutation causing autosomal recessive cornea plana. Invest Ophthalmol Vis Sci 2001; 42:3118-22. [PMID: 11726611] [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: 02/22/2023] Open
Abstract
PURPOSE Mutations in keratocan (KERA), a small leucine-rich proteoglycan, have recently been shown to be responsible for cases of autosomal recessive cornea plana (CNA2). A consanguineous pedigree in which cornea plana cosegregated with microphthalmia was investigated by linkage analysis and direct sequencing. METHODS Linkage was sought to polymorphic microsatellite markers distributed around the CNA2 and microphthalmia loci (arCMIC, adCMIC, NNO1, and CHX10) using PCR and nondenaturing polyacrylamide gel electrophoresis before KERA was directly sequenced for mutations. RESULTS Positive lod scores were obtained with markers encompassing the CNA2 locus, the maximum two-point lod scores of 2.18 at recombination fraction theta = 0 was obtained with markers D12S95 and D12S327. Mutation screening of KERA revealed a novel single-nucleotide substitution at codon 215, which results in the substitution of lysine for threonine at the start of a highly conserved leucine-rich repeat motif. Structural modeling predicts that the motifs are stacked into an arched beta-sheet array and that the effect of the mutation is to alter the length and position of one of these motifs. CONCLUSIONS This report describes a novel mutation in KERA that alters a highly conserved motif and is predicted to affect the tertiary structure of the molecule. Normal corneal function is dependent on the regular spacing of collagen fibrils, and the predicted alteration of the tertiary structure of KERA is the probable mechanism of the cornea plana phenotype.
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Affiliation(s)
- O J Lehmann
- Department of Molecular Genetics, Institute of Ophthalmology, Bath Street, London, UK EC1V 9EL
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