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Beach C, MacLean D, Majorova D, Melemenidis S, Nambiar DK, Kim RK, Valbuena GN, Guglietta S, Krieg C, Darvish-Damavandi M, Suwa T, Easton A, Hillson LV, McCulloch AK, McMahon RK, Pennel K, Edwards J, O’Cathail SM, Roxburgh CS, Domingo E, Moon EJ, Jiang D, Jiang Y, Zhang Q, Koong AC, Woodruff TM, Graves EE, Maughan T, Buczacki SJ, Stucki M, Le QT, Leedham SJ, Giaccia AJ, Olcina MM. Improving radiotherapy in immunosuppressive microenvironments by targeting complement receptor C5aR1. J Clin Invest 2023; 133:e168277. [PMID: 37824211 PMCID: PMC10688992 DOI: 10.1172/jci168277] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 10/05/2023] [Indexed: 10/14/2023] Open
Abstract
An immunosuppressive microenvironment causes poor tumor T cell infiltration and is associated with reduced patient overall survival in colorectal cancer. How to improve treatment responses in these tumors is still a challenge. Using an integrated screening approach to identify cancer-specific vulnerabilities, we identified complement receptor C5aR1 as a druggable target, which when inhibited improved radiotherapy, even in tumors displaying immunosuppressive features and poor CD8+ T cell infiltration. While C5aR1 is well-known for its role in the immune compartment, we found that C5aR1 is also robustly expressed on malignant epithelial cells, highlighting potential tumor cell-specific functions. C5aR1 targeting resulted in increased NF-κB-dependent apoptosis specifically in tumors and not normal tissues, indicating that, in malignant cells, C5aR1 primarily regulated cell fate. Collectively, these data revealed that increased complement gene expression is part of the stress response mounted by irradiated tumors and that targeting C5aR1 could improve radiotherapy, even in tumors displaying immunosuppressive features.
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Affiliation(s)
- Callum Beach
- Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - David MacLean
- Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - Dominika Majorova
- Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - Stavros Melemenidis
- Department of Radiation Oncology, Stanford University, Stanford, California, USA
| | - Dhanya K. Nambiar
- Department of Radiation Oncology, Stanford University, Stanford, California, USA
| | - Ryan K. Kim
- Department of Radiation Oncology, Stanford University, Stanford, California, USA
| | - Gabriel N. Valbuena
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Silvia Guglietta
- Department of Regenerative Medicine and Cell Biology
- Hollings Cancer Center, and
| | - Carsten Krieg
- Hollings Cancer Center, and
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | | | - Tatsuya Suwa
- Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - Alistair Easton
- Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - Lily V.S. Hillson
- School of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | | | - Ross K. McMahon
- School of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Kathryn Pennel
- School of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Joanne Edwards
- School of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Sean M. O’Cathail
- School of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | | | - Enric Domingo
- Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - Eui Jung Moon
- Department of Oncology, University of Oxford, Oxford, United Kingdom
- Department of Radiation Oncology, Stanford University, Stanford, California, USA
| | - Dadi Jiang
- The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Yanyan Jiang
- Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - Qingyang Zhang
- Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - Albert C. Koong
- The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Trent M. Woodruff
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Edward E. Graves
- Department of Radiation Oncology, Stanford University, Stanford, California, USA
| | - Tim Maughan
- Department of Oncology, University of Oxford, Oxford, United Kingdom
| | - Simon J.A. Buczacki
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom
| | - Manuel Stucki
- Department of Gynecology, University of Zurich, Schlieren, Switzerland
| | - Quynh-Thu Le
- Department of Radiation Oncology, Stanford University, Stanford, California, USA
| | - Simon J. Leedham
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Amato J. Giaccia
- Department of Oncology, University of Oxford, Oxford, United Kingdom
- Department of Radiation Oncology, Stanford University, Stanford, California, USA
| | - Monica M. Olcina
- Department of Oncology, University of Oxford, Oxford, United Kingdom
- Department of Radiation Oncology, Stanford University, Stanford, California, USA
- Department of Gynecology, University of Zurich, Schlieren, Switzerland
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Tamborska AA, Wood GK, Westenberg E, Garcia-Azorin D, Webb G, Schiess N, Netravathi M, Baykan B, Dervaj R, Helbok R, Lant S, Özge A, Padovani A, Saylor D, Schmutzhard E, Easton A, Lilleker JB, Jackson T, Beghi E, Ellul MA, Frontera JA, Pollak T, Nicholson TR, Wood N, Thakur KT, Solomon T, Stark RJ, Winkler AS, Michael BD. Corrigendum to "Global uncertainty in the diagnosis of neurological complications of SARS-CoV-2 infection by both neurologists and non-neurologists: An international inter-observer variability study" [Journal of the Neurological Sciences. 2023 Jun 15;449:120646]. J Neurol Sci 2023; 451:120709. [PMID: 37385027 PMCID: PMC10294702 DOI: 10.1016/j.jns.2023.120709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Affiliation(s)
- A A Tamborska
- National Institute for Health Research Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological sciences, University of Liverpool, Liverpool, UK; Department of Neurology, Walton Centre NHS Foundation Trust, Liverpool L9 7LJ, UK
| | - G K Wood
- Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological sciences, University of Liverpool, Liverpool, UK; Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK
| | - E Westenberg
- Center for Global Health, Department of Neurology, Faculty of Medicine, Technical University of Munich, Germany
| | - D Garcia-Azorin
- Department of Neurology, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - G Webb
- Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological sciences, University of Liverpool, Liverpool, UK; Department of Neurology, Walton Centre NHS Foundation Trust, Liverpool L9 7LJ, UK
| | - N Schiess
- Brain Health Unit, Mental Health and Substance Use Department, World Health Organization, USA
| | - M Netravathi
- Department of Neurology, National Institute of Mental Health & Neurosciences, Bangalore, India
| | - B Baykan
- Istanbul University, Istanbul Faculty of Medicine, Department of Neurology, Istanbul, Turkiye; EMAR Medical Center, Macka Istanbul, Turkiye
| | - R Dervaj
- Department of Neurology, Apollo Specialty Hospital, Bangalore, Karnataka, India
| | - R Helbok
- Department of Neurology, Division Neuro-Critical Care, Medical University Innsbruck, Austria
| | - S Lant
- Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological sciences, University of Liverpool, Liverpool, UK
| | - A Özge
- Mersin University Medical Faculty, Department of Neurology, Mersin, Turkey
| | - A Padovani
- Clinical and Experimental Sciences Department, Neurology Unit, University and SpedaliCivili, Brescia, Italy
| | - D Saylor
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - E Schmutzhard
- Department of Neurology, Division Neuro-Critical Care, Medical University Innsbruck, Austria
| | - A Easton
- Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological sciences, University of Liverpool, Liverpool, UK; Encephalitis Society, United Kingdom
| | - J B Lilleker
- Manchester Centre for Clinical Neurosciences, Northern Care Alliance NHS Foundation Trust, Salford, UK; Centre for Musculoskeletal Research, Division of Musculoskeletal and Dermatological Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - T Jackson
- Institute of Inflammation and Ageing, University of Birmingham, UK; Geriatric Medicine, University Hospitals Birmingham, Birmingham, UK
| | - E Beghi
- Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - M A Ellul
- National Institute for Health Research Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological sciences, University of Liverpool, Liverpool, UK; Department of Neurology, Walton Centre NHS Foundation Trust, Liverpool L9 7LJ, UK
| | - J A Frontera
- Department of Neurology, New York University Grossman School of Medicine, NY, New York, USA
| | - T Pollak
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - T R Nicholson
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - N Wood
- Department of Clinical and Movement Neurosciences, University College London, UCL Queen Square Institute of Neurology, London, UK
| | - K T Thakur
- Columbia University Irving Medical Center-New York Presbyterian Hospital, NY, New York, USA
| | - T Solomon
- National Institute for Health Research Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Department of Neurology, Walton Centre NHS Foundation Trust, Liverpool L9 7LJ, UK; The Pandemic Institute, Liverpool, UK
| | - R J Stark
- Department of Neurology, Alfred Hospital, Melbourne, Australia; Department of Neuroscience, Monash University, Melbourne, Australia
| | - A S Winkler
- Center for Global Health, Department of Neurology, Faculty of Medicine, Technical University of Munich, Germany; Centre for Global Health, Institute of Health and Society, Faculty of Medicine, University of Oslo, Norway
| | - B D Michael
- National Institute for Health Research Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological sciences, University of Liverpool, Liverpool, UK; Department of Neurology, Walton Centre NHS Foundation Trust, Liverpool L9 7LJ, UK.
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3
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Tamborska AA, Wood GK, Westenberg E, Garcia-Azorin D, Webb G, Schiess N, Netravathi M, Baykan B, Dervaj R, Helbok R, Lant S, Özge A, Padovani A, Saylor D, Schmutzhard E, Easton A, Lilleker JB, Jackson T, Beghi E, Ellul MA, Frontera JA, Pollak T, Nicholson TR, Wood N, Thakur KT, Solomon T, Stark RJ, Winkler AS, Michael BD. Global uncertainty in the diagnosis of neurological complications of SARS-CoV-2 infection by both neurologists and non-neurologists: An international inter-observer variability study. J Neurol Sci 2023; 449:120646. [PMID: 37100018 PMCID: PMC10085971 DOI: 10.1016/j.jns.2023.120646] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/26/2023] [Accepted: 04/08/2023] [Indexed: 04/28/2023]
Abstract
INTRODUCTION Uniform case definitions are required to ensure harmonised reporting of neurological syndromes associated with SARS-CoV-2. Moreover, it is unclear how clinicians perceive the relative importance of SARS-CoV-2 in neurological syndromes, which risks under- or over-reporting. METHODS We invited clinicians through global networks, including the World Federation of Neurology, to assess ten anonymised vignettes of SARS-CoV-2 neurological syndromes. Using standardised case definitions, clinicians assigned a diagnosis and ranked association with SARS-CoV-2. We compared diagnostic accuracy and assigned association ranks between different settings and specialties and calculated inter-rater agreement for case definitions as "poor" (κ ≤ 0.4), "moderate" or "good" (κ > 0.6). RESULTS 1265 diagnoses were assigned by 146 participants from 45 countries on six continents. The highest correct proportion were cerebral venous sinus thrombosis (CVST, 95.8%), Guillain-Barré syndrome (GBS, 92.4%) and headache (91.6%) and the lowest encephalitis (72.8%), psychosis (53.8%) and encephalopathy (43.2%). Diagnostic accuracy was similar between neurologists and non-neurologists (median score 8 vs. 7/10, p = 0.1). Good inter-rater agreement was observed for five diagnoses: cranial neuropathy, headache, myelitis, CVST, and GBS and poor agreement for encephalopathy. In 13% of vignettes, clinicians incorrectly assigned lowest association ranks, regardless of setting and specialty. CONCLUSION The case definitions can help with reporting of neurological complications of SARS-CoV-2, also in settings with few neurologists. However, encephalopathy, encephalitis, and psychosis were often misdiagnosed, and clinicians underestimated the association with SARS-CoV-2. Future work should refine the case definitions and provide training if global reporting of neurological syndromes associated with SARS-CoV-2 is to be robust.
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Affiliation(s)
- A A Tamborska
- National Institute for Health Research Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Department of Neurology, Walton Centre NHS Foundation Trust, Liverpool L9 7LJ, UK
| | - G K Wood
- Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK
| | - E Westenberg
- Center for Global Health, Department of Neurology, Faculty of Medicine, Technical University of Munich, Germany
| | - D Garcia-Azorin
- Department of Neurology, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - G Webb
- Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Department of Neurology, Walton Centre NHS Foundation Trust, Liverpool L9 7LJ, UK
| | - N Schiess
- Brain Health Unit, Mental Health and Substance Use Department, World Health Organization, Switzerland
| | - M Netravathi
- Department of Neurology, National Institute of Mental Health & Neurosciences, Bangalore, India
| | - B Baykan
- Istanbul University, Istanbul Faculty of Medicine, Department of Neurology, Istanbul, Turkiye; EMAR Medical Center, Macka Istanbul, Turkiye
| | - R Dervaj
- Department of Neurology, Apollo Specialty Hospital, Bangalore, Karnataka, India
| | - R Helbok
- Department of Neurology, Division Neuro-Critical Care, Medical University Innsbruck, Austria
| | - S Lant
- Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - A Özge
- Mersin University Medical Faculty, Department of Neurology, Mersin, Turkey
| | - A Padovani
- Clinical and Experimental Sciences Department, Neurology Unit, University and SpedaliCivili, Brescia, Italy
| | - D Saylor
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - E Schmutzhard
- Department of Neurology, Division Neuro-Critical Care, Medical University Innsbruck, Austria
| | - A Easton
- Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Encephalitis Society, UK
| | - J B Lilleker
- Manchester Centre for Clinical Neurosciences, Northern Care Alliance NHS Foundation Trust, Salford, UK; Centre for Musculoskeletal Research, Division of Musculoskeletal and Dermatological Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - T Jackson
- Institute of Inflammation and Ageing, University of Birmingham, UK; Geriatric Medicine, University Hospitals Birmingham, Birmingham, UK
| | - E Beghi
- Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - M A Ellul
- National Institute for Health Research Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Department of Neurology, Walton Centre NHS Foundation Trust, Liverpool L9 7LJ, UK
| | - J A Frontera
- Department of Neurology, New York University Grossman School of Medicine, New York, NY, USA
| | - T Pollak
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - T R Nicholson
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - N Wood
- Department of Clinical and Movement Neurosciences, University College London, UCL Queen Square Institute of Neurology, London, UK
| | - K T Thakur
- Columbia University Irving Medical Center-New York Presbyterian Hospital, New York, NY, USA
| | - T Solomon
- National Institute for Health Research Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Department of Neurology, Walton Centre NHS Foundation Trust, Liverpool L9 7LJ, UK; The Pandemic Institute, Liverpool, UK
| | - R J Stark
- Department of Neurology, Alfred Hospital, Melbourne, Australia; Department of Neuroscience, Monash University, Melbourne, Australia
| | - A S Winkler
- Center for Global Health, Department of Neurology, Faculty of Medicine, Technical University of Munich, Germany; Centre for Global Health, Institute of Health and Society, Faculty of Medicine, University of Oslo, Norway
| | - B D Michael
- National Institute for Health Research Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK; Department of Neurology, Walton Centre NHS Foundation Trust, Liverpool L9 7LJ, UK.
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4
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Gil Vazquez E, Nasreddin N, Valbuena GN, Mulholland EJ, Belnoue-Davis HL, Eggington HR, Schenck RO, Wouters VM, Wirapati P, Gilroy K, Lannagan TR, Flanagan DJ, Najumudeen AK, Omwenga S, McCorry AM, Easton A, Koelzer VH, East JE, Morton D, Trusolino L, Maughan T, Campbell AD, Loughrey MB, Dunne PD, Tsantoulis P, Huels DJ, Tejpar S, Sansom OJ, Leedham SJ. Dynamic and adaptive cancer stem cell population admixture in colorectal neoplasia. Cell Stem Cell 2022; 29:1612. [PMID: 36332574 PMCID: PMC9807457 DOI: 10.1016/j.stem.2022.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Webb ER, Moreno-Vincente J, Easton A, Lanati S, Taylor M, James S, Williams EL, English V, Penfold C, Beers SA, Gray JC. Cyclophosphamide depletes tumor infiltrating T regulatory cells and combined with anti-PD-1 therapy improves survival in murine neuroblastoma. iScience 2022; 25:104995. [PMID: 36097618 PMCID: PMC9463572 DOI: 10.1016/j.isci.2022.104995] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 05/20/2022] [Accepted: 08/18/2022] [Indexed: 10/27/2022] Open
Abstract
The outcome for children with high-risk neuroblastoma is poor despite intensive multi-modal treatment protocols. Toxicity from current treatments is significant, and novel approaches are needed to improve outcome. Cyclophosphamide (CPM) is a key component of current chemotherapy regimens and is known to have immunomodulatory effects. However, this has not been investigated in the context of tumor infiltrating lymphocytes in neuroblastoma. Using murine models of neuroblastoma, the immunomodulatory effects of low-dose CPM were investigated using detailed immunophenotyping. We demonstrated that CPM resulted in a specific depletion of intratumoral T regulatory cells by apoptosis, and when combined with anti-PD-1 antibody therapy, this resulted in improved therapeutic efficacy. CPM combined with anti-PD-1 therapy was demonstrated to be an effective combinational therapy, with metronomic CPM found to be more effective than single dosing in more resistant tumor models. Overall, this pre-clinical data strongly support clinical evaluation of such combination strategies in neuroblastoma.
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Affiliation(s)
- Emily R. Webb
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, Hampshire SO16 6YD, UK
| | - Julia Moreno-Vincente
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, Hampshire SO16 6YD, UK
| | - Alistair Easton
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, Hampshire SO16 6YD, UK
- Cellular Pathology, University Hospitals Southampton NHS Foundation Trust, Southampton SO16 6YD, UK
| | - Silvia Lanati
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, Hampshire SO16 6YD, UK
| | - Martin Taylor
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, Hampshire SO16 6YD, UK
| | - Sonya James
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, Hampshire SO16 6YD, UK
| | - Emily L. Williams
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, Hampshire SO16 6YD, UK
| | - Vikki English
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, Hampshire SO16 6YD, UK
| | - Chris Penfold
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, Hampshire SO16 6YD, UK
| | - Stephen A. Beers
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, Hampshire SO16 6YD, UK
| | - Juliet C. Gray
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Tremona Road, Southampton, Hampshire SO16 6YD, UK
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6
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Gil Vazquez E, Nasreddin N, Valbuena GN, Mulholland EJ, Belnoue-Davis HL, Eggington HR, Schenck RO, Wouters VM, Wirapati P, Gilroy K, Lannagan TR, Flanagan DJ, Najumudeen AK, Omwenga S, McCorry AM, Easton A, Koelzer VH, East JE, Morton D, Trusolino L, Maughan T, Campbell AD, Loughrey MB, Dunne PD, Tsantoulis P, Huels DJ, Tejpar S, Sansom OJ, Leedham SJ. Dynamic and adaptive cancer stem cell population admixture in colorectal neoplasia. Cell Stem Cell 2022; 29:1213-1228.e8. [PMID: 35931031 PMCID: PMC9592560 DOI: 10.1016/j.stem.2022.07.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [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: 05/04/2022] [Revised: 06/01/2022] [Accepted: 07/19/2022] [Indexed: 12/13/2022]
Abstract
Intestinal homeostasis is underpinned by LGR5+ve crypt-base columnar stem cells (CBCs), but following injury, dedifferentiation results in the emergence of LGR5-ve regenerative stem cell populations (RSCs), characterized by fetal transcriptional profiles. Neoplasia hijacks regenerative signaling, so we assessed the distribution of CBCs and RSCs in mouse and human intestinal tumors. Using combined molecular-morphological analysis, we demonstrate variable expression of stem cell markers across a range of lesions. The degree of CBC-RSC admixture was associated with both epithelial mutation and microenvironmental signaling disruption and could be mapped across disease molecular subtypes. The CBC-RSC equilibrium was adaptive, with a dynamic response to acute selective pressure, and adaptability was associated with chemoresistance. We propose a fitness landscape model where individual tumors have equilibrated stem cell population distributions along a CBC-RSC phenotypic axis. Cellular plasticity is represented by position shift along this axis and is influenced by cell-intrinsic, extrinsic, and therapeutic selective pressures.
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Affiliation(s)
- Ester Gil Vazquez
- Wellcome Centre Human Genetics, Roosevelt Drive, University of Oxford, Oxford, UK
| | - Nadia Nasreddin
- Wellcome Centre Human Genetics, Roosevelt Drive, University of Oxford, Oxford, UK
| | - Gabriel N. Valbuena
- Wellcome Centre Human Genetics, Roosevelt Drive, University of Oxford, Oxford, UK
| | - Eoghan J. Mulholland
- Wellcome Centre Human Genetics, Roosevelt Drive, University of Oxford, Oxford, UK
| | | | - Holly R. Eggington
- Wellcome Centre Human Genetics, Roosevelt Drive, University of Oxford, Oxford, UK
| | - Ryan O. Schenck
- Wellcome Centre Human Genetics, Roosevelt Drive, University of Oxford, Oxford, UK
| | - Valérie M. Wouters
- Laboratory for Experimental Oncology and Radiobiology, Center for Experimental and Molecular Medicine, Amsterdam University Medical Centers, Meibergdreef 9, 1105 Amsterdam, the Netherlands,Oncode Institute, Meibergdreef 9, 1105 Amsterdam, the Netherlands
| | - Pratyaksha Wirapati
- Swiss Institute for Bioinformatics, University of Lausanne, Lausanne, Switzerland
| | | | | | | | | | - Sulochana Omwenga
- Wellcome Centre Human Genetics, Roosevelt Drive, University of Oxford, Oxford, UK
| | - Amy M.B. McCorry
- Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, UK
| | - Alistair Easton
- Department of Oncology, Old Road Campus Research Building, Roosevelt Drive, University of Oxford, Oxford, UK
| | - Viktor H. Koelzer
- Department of Pathology and Molecular Pathology, University and University Hospital Zürich, Rämistrasse 100, 8006 Zürich, Switzerland
| | - James E. East
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, and Oxford NIHR Biomedical Research Centre, Oxford, UK
| | - Dion Morton
- Academic Department of Surgery, University of Birmingham, Birmingham, UK
| | - Livio Trusolino
- Candiolo Cancer Institute FPO IRCCS, 10060 Candiolo, Torino, Italy
| | - Timothy Maughan
- Department of Oncology, Old Road Campus Research Building, Roosevelt Drive, University of Oxford, Oxford, UK
| | | | - Maurice B. Loughrey
- Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, UK
| | - Philip D. Dunne
- Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, UK
| | - Petros Tsantoulis
- University of Geneva and Department of Oncology, Hôpitaux Universitaires de Genève, Geneva, Switzerland
| | - David J. Huels
- Laboratory for Experimental Oncology and Radiobiology, Center for Experimental and Molecular Medicine, Amsterdam University Medical Centers, Meibergdreef 9, 1105 Amsterdam, the Netherlands,Oncode Institute, Meibergdreef 9, 1105 Amsterdam, the Netherlands
| | - Sabine Tejpar
- Molecular Digestive Oncology Unit, KU Leuven, Leuven, Belgium
| | - Owen J. Sansom
- Cancer Research UK Beatson Institute, Glasgow, UK,Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Glasgow, UK
| | - Simon J. Leedham
- Wellcome Centre Human Genetics, Roosevelt Drive, University of Oxford, Oxford, UK,Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, and Oxford NIHR Biomedical Research Centre, Oxford, UK,Corresponding author
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Al-Diwani A, Theorell J, Damato V, Bull J, McGlashan N, Green E, Kienzler AK, Harrison R, Hassanali T, Campo L, Browne M, Easton A, Soleymani majd H, Tenaka K, Iorio R, Dale RC, Harrison P, Geddes J, Quested D, Sharp D, Lee ST, Nauen DW, Makuch M, Lennox B, Fowler D, Sheerin F, Waters P, Leite MI, Handel AE, Irani SR. Cervical lymph nodes and ovarian teratomas as germinal centres in NMDA receptor-antibody encephalitis. Brain 2022; 145:2742-2754. [PMID: 35680425 PMCID: PMC9486890 DOI: 10.1093/brain/awac088] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [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: 07/28/2021] [Revised: 12/22/2021] [Accepted: 01/24/2022] [Indexed: 01/14/2023] Open
Abstract
Autoantibodies against the extracellular domain of the N-methyl-d-aspartate receptor (NMDAR) NR1 subunit cause a severe and common form of encephalitis. To better understand their generation, we aimed to characterize and identify human germinal centres actively participating in NMDAR-specific autoimmunization by sampling patient blood, CSF, ovarian teratoma tissue and, directly from the putative site of human CNS lymphatic drainage, cervical lymph nodes. From serum, both NR1-IgA and NR1-IgM were detected more frequently in NMDAR-antibody encephalitis patients versus controls (both P < 0.0001). Within patients, ovarian teratoma status was associated with a higher frequency of NR1-IgA positivity in serum (OR = 3.1; P < 0.0001) and CSF (OR = 3.8, P = 0.047), particularly early in disease and before ovarian teratoma resection. Consistent with this immunoglobulin class bias, ovarian teratoma samples showed intratumoral production of both NR1-IgG and NR1-IgA and, by single cell RNA sequencing, contained expanded highly-mutated IgA clones with an ovarian teratoma-restricted B cell population. Multiplex histology suggested tertiary lymphoid architectures in ovarian teratomas with dense B cell foci expressing the germinal centre marker BCL6, CD21+ follicular dendritic cells, and the NR1 subunit, alongside lymphatic vessels and high endothelial vasculature. Cultured teratoma explants and dissociated intratumoral B cells secreted NR1-IgGs in culture. Hence, ovarian teratomas showed structural and functional evidence of NR1-specific germinal centres. On exploring classical secondary lymphoid organs, B cells cultured from cervical lymph nodes of patients with NMDAR-antibody encephalitis produced NR1-IgG in 3/7 cultures, from patients with the highest serum NR1-IgG levels (P < 0.05). By contrast, NR1-IgG secretion was observed neither from cervical lymph nodes in disease controls nor in patients with adequately resected ovarian teratomas. Our multimodal evaluations provide convergent anatomical and functional evidence of NMDAR-autoantibody production from active germinal centres within both intratumoral tertiary lymphoid structures and traditional secondary lymphoid organs, the cervical lymph nodes. Furthermore, we develop a cervical lymph node sampling protocol that can be used to directly explore immune activity in health and disease at this emerging neuroimmune interface.
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Affiliation(s)
- Adam Al-Diwani
- Oxford Autoimmune Neurology Group, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK,University Department of Psychiatry, University of Oxford, Oxford, UK
| | - Jakob Theorell
- Oxford Autoimmune Neurology Group, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK,Department of Clinical Neurosciences, Karolinska Institutet, Stockholm, Sweden
| | - Valentina Damato
- Oxford Autoimmune Neurology Group, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK,UOC Neurologia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Joshua Bull
- Wolfson Centre for Mathematical Biology, Mathematical Institute, University of Oxford, Oxford, UK
| | - Nicholas McGlashan
- Department of Radiology, John Radcliffe Hospital, Oxford University Hospitals, Oxford, UK
| | - Edward Green
- Department of Radiology, John Radcliffe Hospital, Oxford University Hospitals, Oxford, UK
| | - Anne Kathrin Kienzler
- Oxford Autoimmune Neurology Group, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Ruby Harrison
- Oxford Autoimmune Neurology Group, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Tasneem Hassanali
- Translational Histopathology Laboratory, Department of Oncology, University of Oxford, Oxford, UK
| | - Leticia Campo
- Translational Histopathology Laboratory, Department of Oncology, University of Oxford, Oxford, UK
| | - Molly Browne
- Translational Histopathology Laboratory, Department of Oncology, University of Oxford, Oxford, UK
| | - Alistair Easton
- Translational Histopathology Laboratory, Department of Oncology, University of Oxford, Oxford, UK
| | | | - Keiko Tenaka
- Department of Animal Model Development, Brain Research Institute, Niigata University, Niigata, Japan
| | - Raffaele Iorio
- UOC Neurologia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy,Università Cattolica del Sacro Cuore, Rome, Italy
| | - Russell C Dale
- Kids Neuroscience Centre, Children’s Hospital at Westmead, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - Paul Harrison
- University Department of Psychiatry, University of Oxford, Oxford, UK
| | - John Geddes
- University Department of Psychiatry, University of Oxford, Oxford, UK
| | - Digby Quested
- University Department of Psychiatry, University of Oxford, Oxford, UK
| | - David Sharp
- Computational, Cognitive and Clinical Neuroimaging Laboratory, Division of Brain Sciences, Imperial College London, London, UK
| | - Soon Tae Lee
- Department of Neurology, Seoul National University Hospital, Seoul, South Korea
| | - David W Nauen
- Department of Pathology, Johns Hopkins Hospital, Baltimore, MD, USA
| | - Mateusz Makuch
- Oxford Autoimmune Neurology Group, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Belinda Lennox
- University Department of Psychiatry, University of Oxford, Oxford, UK
| | - Darren Fowler
- Department of Pathology, John Radcliffe Hospital, Oxford University Hospitals, Oxford, UK
| | - Fintan Sheerin
- Department of Radiology, John Radcliffe Hospital, Oxford University Hospitals, Oxford, UK
| | - Patrick Waters
- Oxford Autoimmune Neurology Group, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - M Isabel Leite
- Oxford Autoimmune Neurology Group, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK,Department of Neurology, John Radcliffe Hospital, Oxford University Hospitals, Oxford, UK
| | - Adam E Handel
- Oxford Autoimmune Neurology Group, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK,Department of Neurology, John Radcliffe Hospital, Oxford University Hospitals, Oxford, UK
| | - Sarosh R Irani
- Correspondence to: Professor Sarosh Irani Oxford Autoimmune Neurology Group West Wing, Level 6, John Radcliffe Hospital Oxford OX3 9DU, UK E-mail:
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8
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Schwenzer H, De Zan E, Elshani M, van Stiphout R, Kudsy M, Morris J, Ferrari V, Um IH, Chettle J, Kazmi F, Campo L, Easton A, Nijman S, Serpi M, Symeonides S, Plummer R, Harrison DJ, Bond G, Blagden SP. The Novel Nucleoside Analogue ProTide NUC-7738 Overcomes Cancer Resistance Mechanisms In Vitro and in a First-In-Human Phase I Clinical Trial. Clin Cancer Res 2021; 27:6500-6513. [PMID: 34497073 PMCID: PMC9401491 DOI: 10.1158/1078-0432.ccr-21-1652] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/04/2021] [Accepted: 09/02/2021] [Indexed: 01/07/2023]
Abstract
PURPOSE Nucleoside analogues form the backbone of many therapeutic regimens in oncology and require the presence of intracellular enzymes for their activation. A ProTide is comprised of a nucleoside fused to a protective phosphoramidate cap. ProTides are easily incorporated into cells whereupon the cap is cleaved and a preactivated nucleoside released. 3'-Deoxyadenosine (3'-dA) is a naturally occurring adenosine analogue with established anticancer activity in vitro but limited bioavailability due to its rapid in vivo deamination by the circulating enzyme adenosine deaminase, poor uptake into cells, and reliance on adenosine kinase for its activation. In order to overcome these limitations, 3'-dA was chemically modified to create the novel ProTide NUC-7738. EXPERIMENTAL DESIGN We describe the synthesis of NUC-7738. We determine the IC50 of NUC-7738 using pharmacokinetics (PK) and conduct genome-wide analyses to identify its mechanism of action using different cancer model systems. We validate these findings in patients with cancer. RESULTS We show that NUC-7738 overcomes the cancer resistance mechanisms that limit the activity of 3'-dA and that its activation is dependent on ProTide cleavage by the enzyme histidine triad nucleotide-binding protein 1. PK and tumor samples obtained from the ongoing first-in-human phase I clinical trial of NUC-7738 further validate our in vitro findings and show NUC-7738 is an effective proapoptotic agent in cancer cells with effects on the NF-κB pathway. CONCLUSIONS Our study provides proof that NUC-7738 overcomes cellular resistance mechanisms and supports its further clinical evaluation as a novel cancer treatment within the growing pantheon of anticancer ProTides.
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Affiliation(s)
- Hagen Schwenzer
- Department of Oncology, Medical Sciences Division, University of Oxford, Oxford, United Kingdom.,Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Erica De Zan
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Mustafa Elshani
- School of Medicine, University of St Andrews, St. Andrews, United Kingdom
| | - Ruud van Stiphout
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Mary Kudsy
- School of Medicine, University of St Andrews, St. Andrews, United Kingdom
| | - Josephine Morris
- Department of Oncology, Medical Sciences Division, University of Oxford, Oxford, United Kingdom
| | - Valentina Ferrari
- School of Pharmacy and Pharmaceutical Sciences, University of Cardiff, Cardiff, United Kingdom
| | - In Hwa Um
- School of Medicine, University of St Andrews, St. Andrews, United Kingdom
| | - James Chettle
- Department of Oncology, Medical Sciences Division, University of Oxford, Oxford, United Kingdom
| | - Farasat Kazmi
- Department of Oncology, Medical Sciences Division, University of Oxford, Oxford, United Kingdom
| | - Leticia Campo
- Department of Oncology, Medical Sciences Division, University of Oxford, Oxford, United Kingdom
| | - Alistair Easton
- Department of Oncology, Medical Sciences Division, University of Oxford, Oxford, United Kingdom
| | - Sebastian Nijman
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Michaela Serpi
- School of Pharmacy and Pharmaceutical Sciences, University of Cardiff, Cardiff, United Kingdom
| | - Stefan Symeonides
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, The University of Edinburgh, Western General Hospital, Edinburgh, United Kingdom
| | - Ruth Plummer
- Northern Centre for Cancer Care, Newcastle Hospitals NHS Foundation Trust, Freeman Hospital, Newcastle upon Tyne, United Kingdom
| | - David J. Harrison
- School of Medicine, University of St Andrews, St. Andrews, United Kingdom.,NuCana PLC, Edinburgh, United Kingdom
| | - Gareth Bond
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Sarah P. Blagden
- Department of Oncology, Medical Sciences Division, University of Oxford, Oxford, United Kingdom.,Corresponding Author: Sarah P. Blagden, Department of Oncology, Medical Sciences Division, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ, United Kingdom. Phone: 4401-8656-17409; E-mail:
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9
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Ross TW, Easton A. The Hippocampal Horizon: Constructing and Segmenting Experience for Episodic Memory. Neurosci Biobehav Rev 2021; 132:181-196. [PMID: 34826509 DOI: 10.1016/j.neubiorev.2021.11.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/19/2021] [Accepted: 11/22/2021] [Indexed: 12/29/2022]
Abstract
How do we recollect specific events that have occurred during continuous ongoing experience? There is converging evidence from non-human animals that spatially modulated cellular activity of the hippocampal formation supports the construction of ongoing events. On the other hand, recent human oriented event cognition models have outlined that our experience is segmented into discrete units, and that such segmentation can operate on shorter or longer timescales. Here, we describe a unification of how these dynamic physiological mechanisms of the hippocampus relate to ongoing externally and internally driven event segmentation, facilitating the demarcation of specific moments during experience. Our cross-species interdisciplinary approach offers a novel perspective in the way we construct and remember specific events, leading to the generation of many new hypotheses for future research.
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Affiliation(s)
- T W Ross
- Department of Psychology, Durham University, South Road, Durham, DH1 3LE, United Kingdom; Centre for Learning and Memory Processes, Durham University, United Kingdom.
| | - A Easton
- Department of Psychology, Durham University, South Road, Durham, DH1 3LE, United Kingdom; Centre for Learning and Memory Processes, Durham University, United Kingdom
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10
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Friedrich M, Pohin M, Jackson MA, Korsunsky I, Bullers SJ, Rue-Albrecht K, Christoforidou Z, Sathananthan D, Thomas T, Ravindran R, Tandon R, Peres RS, Sharpe H, Wei K, Watts GFM, Mann EH, Geremia A, Attar M, McCuaig S, Thomas L, Collantes E, Uhlig HH, Sansom SN, Easton A, Raychaudhuri S, Travis SP, Powrie FM. IL-1-driven stromal-neutrophil interactions define a subset of patients with inflammatory bowel disease that does not respond to therapies. Nat Med 2021; 27:1970-1981. [PMID: 34675383 PMCID: PMC8604730 DOI: 10.1038/s41591-021-01520-5] [Citation(s) in RCA: 92] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 08/26/2021] [Indexed: 02/06/2023]
Abstract
Current inflammatory bowel disease (IBD) therapies are ineffective in a high proportion of patients. Combining bulk and single-cell transcriptomics, quantitative histopathology and in situ localization across three cohorts of patients with IBD (total n = 376), we identify coexpressed gene modules within the heterogeneous tissular inflammatory response in IBD that map to distinct histopathological and cellular features (pathotypes). One of these pathotypes is defined by high neutrophil infiltration, activation of fibroblasts and vascular remodeling at sites of deep ulceration. Activated fibroblasts in the ulcer bed display neutrophil-chemoattractant properties that are IL-1R, but not TNF, dependent. Pathotype-associated neutrophil and fibroblast signatures are increased in nonresponders to several therapies across four independent cohorts (total n = 343). The identification of distinct, localized, tissular pathotypes will aid precision targeting of current therapeutics and provides a biological rationale for IL-1 signaling blockade in ulcerating disease.
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Affiliation(s)
- Matthias Friedrich
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Mathilde Pohin
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Matthew A Jackson
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Ilya Korsunsky
- Center for Data Sciences, Brigham and Women's Hospital, Boston, MA, USA
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Division of Rheumatology, Inflammation and Immunity, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Samuel J Bullers
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Kevin Rue-Albrecht
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Zoe Christoforidou
- MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Dharshan Sathananthan
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, UK
| | - Tom Thomas
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, UK
| | - Rahul Ravindran
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, UK
| | - Ruchi Tandon
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, UK
| | - Raphael Sanches Peres
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Hannah Sharpe
- Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Kevin Wei
- Division of Rheumatology, Inflammation and Immunity, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Gerald F M Watts
- Division of Rheumatology, Inflammation and Immunity, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Elizabeth H Mann
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Alessandra Geremia
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, UK
| | - Moustafa Attar
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
- The Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
| | - Sarah McCuaig
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Lloyd Thomas
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, UK
| | - Elena Collantes
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, UK
| | - Holm H Uhlig
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, UK
- Department of Paediatrics, John Radcliffe Hospital, Oxford, UK
| | - Stephen N Sansom
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Alistair Easton
- Old Road Campus Research Building, Department of Oncology, Medical Sciences Division, University of Oxford, Oxford, UK
| | - Soumya Raychaudhuri
- Center for Data Sciences, Brigham and Women's Hospital, Boston, MA, USA
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Division of Rheumatology, Inflammation and Immunity, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
- Centre for Genetics and Genomics Versus Arthritis, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Simon P Travis
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, UK
| | - Fiona M Powrie
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK.
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11
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Sasson SC, Slevin SM, Cheung VT, Nassiri I, Olsson-Brown A, Fryer E, Ferreira RC, Trzupek D, Gupta T, Al-Hillawi L, Issaias ML, Easton A, Campo L, FitzPatrick ME, Adams J, Chitnis M, Protheroe A, Tuthill M, Coupe N, Simmons A, Payne M, Middleton MR, Travis SP, Fairfax BP, Klenerman P, Brain O. Interferon-Gamma-Producing CD8 + Tissue Resident Memory T Cells Are a Targetable Hallmark of Immune Checkpoint Inhibitor-Colitis. Gastroenterology 2021; 161:1229-1244.e9. [PMID: 34147519 PMCID: PMC8527886 DOI: 10.1053/j.gastro.2021.06.025] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND & AIMS The pathogenesis of immune checkpoint inhibitor (ICI)-colitis remains incompletely understood. We sought to identify key cellular drivers of ICI-colitis and their similarities to idiopathic ulcerative colitis, and to determine potential novel therapeutic targets. METHODS We used a cross-sectional approach to study patients with ICI-colitis, those receiving ICI without the development of colitis, idiopathic ulcerative colitis, and healthy controls. A subset of patients with ICI-colitis were studied longitudinally. We applied a range of methods, including multiparameter and spectral flow cytometry, spectral immunofluorescence microscopy, targeted gene panels, and bulk and single-cell RNA sequencing. RESULTS We demonstrate CD8+ tissue resident memory T (TRM) cells are the dominant activated T cell subset in ICI-colitis. The pattern of gastrointestinal immunopathology is distinct from ulcerative colitis at both the immune and epithelial-signaling levels. CD8+ TRM cell activation correlates with clinical and endoscopic ICI-colitis severity. Single-cell RNA sequencing analysis confirms activated CD8+ TRM cells express high levels of transcripts for checkpoint inhibitors and interferon-gamma in ICI-colitis. We demonstrate similar findings in both anti-CTLA-4/PD-1 combination therapy and in anti-PD-1 inhibitor-associated colitis. On the basis of our data, we successfully targeted this pathway in a patient with refractory ICI-colitis, using the JAK inhibitor tofacitinib. CONCLUSIONS Interferon gamma-producing CD8+ TRM cells are a pathological hallmark of ICI-colitis and a novel target for therapy.
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Affiliation(s)
- Sarah C. Sasson
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom,National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospitals National Health Service Foundation Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Stephanie M. Slevin
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom,National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospitals National Health Service Foundation Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Vincent T.F. Cheung
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom,National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospitals National Health Service Foundation Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Isar Nassiri
- Medical Research Council Human Immunology Unit, Medical Research Council Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Anna Olsson-Brown
- Institute of Translational Medicine, University of Liverpool, Liverpool, United Kingdom,The Clatterbridge Cancer Centre National Health Service Foundation Trust, Wirral, United Kingdom
| | - Eve Fryer
- Department of Cellular Pathology, Oxford University Hospitals National Health Service Foundation Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Ricardo C. Ferreira
- Wellcome Centre for Human Genetics, Nuffield Department of Medicine, National Institute for Health Research Oxford Biomedical Research Centre, University of Oxford, Oxford, United Kingdom
| | - Dominik Trzupek
- Wellcome Centre for Human Genetics, Nuffield Department of Medicine, National Institute for Health Research Oxford Biomedical Research Centre, University of Oxford, Oxford, United Kingdom
| | - Tarun Gupta
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom,Medical Research Council Human Immunology Unit, Medical Research Council Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Lulia Al-Hillawi
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom,National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospitals National Health Service Foundation Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Mari-lenna Issaias
- Department of Oncology, University of Oxford and Oxford Cancer Centre, Churchill Hospital, Oxford University Hospitals National Health Service Foundation Trust, Oxford, United Kingdom
| | - Alistair Easton
- Department of Cellular Pathology, Oxford University Hospitals National Health Service Foundation Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Leticia Campo
- Translational Histopathology Laboratory, Department of Oncology, University of Oxford, United Kingdom
| | - Michael E.B. FitzPatrick
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom,National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospitals National Health Service Foundation Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Joss Adams
- Berkshire Cancer Centre, Royal Berkshire Hospital, Reading, United Kingdom
| | - Meenali Chitnis
- Department of Oncology, University of Oxford and Oxford Cancer Centre, Churchill Hospital, Oxford University Hospitals National Health Service Foundation Trust, Oxford, United Kingdom
| | - Andrew Protheroe
- Department of Oncology, University of Oxford and Oxford Cancer Centre, Churchill Hospital, Oxford University Hospitals National Health Service Foundation Trust, Oxford, United Kingdom
| | - Mark Tuthill
- Department of Oncology, University of Oxford and Oxford Cancer Centre, Churchill Hospital, Oxford University Hospitals National Health Service Foundation Trust, Oxford, United Kingdom
| | - Nicholas Coupe
- Department of Oncology, University of Oxford and Oxford Cancer Centre, Churchill Hospital, Oxford University Hospitals National Health Service Foundation Trust, Oxford, United Kingdom
| | - Alison Simmons
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom,Medical Research Council Human Immunology Unit, Medical Research Council Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Miranda Payne
- Department of Oncology, University of Oxford and Oxford Cancer Centre, Churchill Hospital, Oxford University Hospitals National Health Service Foundation Trust, Oxford, United Kingdom
| | - Mark R. Middleton
- National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospitals National Health Service Foundation Trust, John Radcliffe Hospital, Oxford, United Kingdom,Department of Oncology, University of Oxford and Oxford Cancer Centre, Churchill Hospital, Oxford University Hospitals National Health Service Foundation Trust, Oxford, United Kingdom
| | - Simon P.L. Travis
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom,National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospitals National Health Service Foundation Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | | | - Benjamin P. Fairfax
- Medical Research Council Human Immunology Unit, Medical Research Council Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom,Department of Oncology, University of Oxford and Oxford Cancer Centre, Churchill Hospital, Oxford University Hospitals National Health Service Foundation Trust, Oxford, United Kingdom
| | - Paul Klenerman
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom,National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospitals National Health Service Foundation Trust, John Radcliffe Hospital, Oxford, United Kingdom
| | - Oliver Brain
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom; National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospitals National Health Service Foundation Trust, John Radcliffe Hospital, Oxford, United Kingdom.
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12
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Douglas P, Rice C, Runswick-Cole K, Easton A, Gibson MF, Gruson-Wood J, Klar E, Shields R. Re-storying autism: a body becoming disability studies in education approach. International Journal of Inclusive Education 2021; 25:605-622. [DOI: 10.1080/13603116.2018.1563835] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 12/22/2018] [Indexed: 08/30/2023]
Affiliation(s)
- P. Douglas
- Faculty of Education, Brandon University, Brandon, Canada
| | - C. Rice
- College of Social and Applied Human Sciences, University of Guelph, Guelph, Canada
| | | | - A. Easton
- Independent Artist and Writer, Hamilton, Canada
| | - M. F. Gibson
- School of Social Work, York University, Toronto, Canada
| | - J. Gruson-Wood
- Department of Science and Technology Studies, York University, Toronto, Canada
| | - E. Klar
- Critical Disability Studies, York University, Toronto, Canada
| | - R. Shields
- Critical Disability Studies, York University, Toronto, Canada
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13
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Sivakumar S, Abu-Shah E, Ahern DJ, Arbe-Barnes EH, Jainarayanan AK, Mangal N, Reddy S, Rendek A, Easton A, Kurz E, Silva M, Soonawalla Z, Heij LR, Bashford-Rogers R, Middleton MR, Dustin ML. Activated Regulatory T-Cells, Dysfunctional and Senescent T-Cells Hinder the Immunity in Pancreatic Cancer. Cancers (Basel) 2021; 13:1776. [PMID: 33917832 PMCID: PMC8068251 DOI: 10.3390/cancers13081776] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/20/2021] [Accepted: 03/29/2021] [Indexed: 02/06/2023] Open
Abstract
Pancreatic cancer has one of the worst prognoses of any human malignancy and leukocyte infiltration is a major prognostic marker of the disease. As current immunotherapies confer negligible survival benefits, there is a need to better characterise leukocytes in pancreatic cancer to identify better therapeutic strategies. In this study, we analysed 32 human pancreatic cancer patients from two independent cohorts. A multi-parameter mass-cytometry analysis was performed on 32,000 T-cells from eight patients. Single-cell RNA sequencing dataset analysis was performed on a cohort of 24 patients. Multiplex immunohistochemistry imaging and spatial analysis were performed to map immune infiltration into the tumour microenvironment. Regulatory T-cell populations demonstrated highly immunosuppressive states with high TIGIT, ICOS and CD39 expression. CD8+ T-cells were found to be either in senescence or an exhausted state. The exhausted CD8 T-cells had low PD-1 expression but high TIGIT and CD39 expression. These findings were corroborated in an independent pancreatic cancer single-cell RNA dataset. These data suggest that T-cells are major players in the suppressive microenvironment of pancreatic cancer. Our work identifies multiple novel therapeutic targets that should form the basis for rational design of a new generation of clinical trials in pancreatic ductal adenocarcinoma.
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Affiliation(s)
- Shivan Sivakumar
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (S.S.); (A.E.); (M.R.M.)
- Kennedy Institute of Rheumatology, University of Oxford, Oxford OX3 7FY, UK; (D.J.A.); (A.K.J.); (E.K.)
- Oncology, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 9DU, UK
| | - Enas Abu-Shah
- Kennedy Institute of Rheumatology, University of Oxford, Oxford OX3 7FY, UK; (D.J.A.); (A.K.J.); (E.K.)
- Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK
| | - David J. Ahern
- Kennedy Institute of Rheumatology, University of Oxford, Oxford OX3 7FY, UK; (D.J.A.); (A.K.J.); (E.K.)
| | | | - Ashwin K. Jainarayanan
- Kennedy Institute of Rheumatology, University of Oxford, Oxford OX3 7FY, UK; (D.J.A.); (A.K.J.); (E.K.)
- Interdisciplinary Bioscience Doctoral Training Program and Exeter College, University of Oxford, Oxford OX3 7DQ, UK
| | - Nagina Mangal
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford OX3 9DU, UK;
| | - Srikanth Reddy
- Department of Surgery, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 9DU, UK; (S.R.); (M.S.); (Z.S.)
| | - Aniko Rendek
- Department of Pathology, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 9DU, UK;
| | - Alistair Easton
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (S.S.); (A.E.); (M.R.M.)
| | - Elke Kurz
- Kennedy Institute of Rheumatology, University of Oxford, Oxford OX3 7FY, UK; (D.J.A.); (A.K.J.); (E.K.)
| | - Michael Silva
- Department of Surgery, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 9DU, UK; (S.R.); (M.S.); (Z.S.)
| | - Zahir Soonawalla
- Department of Surgery, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 9DU, UK; (S.R.); (M.S.); (Z.S.)
| | - Lara R. Heij
- Department of General, Gastrointestinal, Hepatobiliary and Transplant Surgery, RWTH Aachen University Hospital, 52074 Aachen, Germany;
- Institute of Pathology, University Hospital RWTH Aachen, 52074 Aachen, Germany
| | | | - Mark R. Middleton
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK; (S.S.); (A.E.); (M.R.M.)
- Oncology, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 9DU, UK
- Oxford NIHR Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 9DU, UK
| | - Michael L. Dustin
- Kennedy Institute of Rheumatology, University of Oxford, Oxford OX3 7FY, UK; (D.J.A.); (A.K.J.); (E.K.)
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14
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Bowler E, Skwarska A, Wilson JD, Ramachandran S, Bolland H, Easton A, Ostheimer C, Hwang MS, Leszczynska KB, Conway SJ, Hammond EM. Pharmacological Inhibition of ATR Can Block Autophagy through an ATR-Independent Mechanism. iScience 2020; 23:101668. [PMID: 33134898 PMCID: PMC7588853 DOI: 10.1016/j.isci.2020.101668] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 09/25/2020] [Accepted: 10/07/2020] [Indexed: 12/26/2022] Open
Abstract
Inhibition of the ATR kinase has emerged as a therapeutically attractive means to target cancer since the development of potent inhibitors, which are now in clinical testing. We investigated a potential link between ATR inhibition and the autophagy process in esophageal cancer cells using four ATR inhibitors including two in clinical testing. The response to pharmacological ATR inhibitors was compared with genetic systems to investigate the ATR dependence of the effects observed. The ATR inhibitor, VX-970, was found to lead to an accumulation of p62 and LC3-II indicative of a blocked autophagy. This increase in p62 occurred post-transcriptionally and in all the cell lines tested. However, our data indicate that the accumulation of p62 occurred in an ATR-independent manner and was instead an off-target response to the ATR inhibitor. This study has important implications for the clinical response to pharmacological ATR inhibition, which in some cases includes the blockage of autophagy.
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Affiliation(s)
- Elizabeth Bowler
- Oxford Institute for Radiation Oncology, Department of Oncology, The University of Oxford, Oxford OX3 7DQ, UK
| | - Anna Skwarska
- Oxford Institute for Radiation Oncology, Department of Oncology, The University of Oxford, Oxford OX3 7DQ, UK
| | - Joseph D. Wilson
- Oxford Institute for Radiation Oncology, Department of Oncology, The University of Oxford, Oxford OX3 7DQ, UK
| | - Shaliny Ramachandran
- Oxford Institute for Radiation Oncology, Department of Oncology, The University of Oxford, Oxford OX3 7DQ, UK
| | - Hannah Bolland
- Oxford Institute for Radiation Oncology, Department of Oncology, The University of Oxford, Oxford OX3 7DQ, UK
| | - Alistair Easton
- Translational Histopathology Lab, Oxford Cancer Centre, Oxford OX3 7DQ, UK
| | - Christian Ostheimer
- Oxford Institute for Radiation Oncology, Department of Oncology, The University of Oxford, Oxford OX3 7DQ, UK
| | - Ming-Shih Hwang
- Oxford Institute for Radiation Oncology, Department of Oncology, The University of Oxford, Oxford OX3 7DQ, UK
| | - Katarzyna B. Leszczynska
- Oxford Institute for Radiation Oncology, Department of Oncology, The University of Oxford, Oxford OX3 7DQ, UK
- Laboratory of Molecular Neurobiology, Neurobiology Center, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Stuart J. Conway
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
| | - Ester M. Hammond
- Oxford Institute for Radiation Oncology, Department of Oncology, The University of Oxford, Oxford OX3 7DQ, UK
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15
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Webb ER, Lanati S, Wareham C, Easton A, Dunn SN, Inzhelevskaya T, Sadler FM, James S, Ashton-Key M, Cragg MS, Beers SA, Gray JC. Immune characterization of pre-clinical murine models of neuroblastoma. Sci Rep 2020; 10:16695. [PMID: 33028899 PMCID: PMC7541480 DOI: 10.1038/s41598-020-73695-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 07/01/2020] [Accepted: 09/18/2020] [Indexed: 12/17/2022] Open
Abstract
Immunotherapy offers a potentially less toxic, more tumor-specific treatment for neuroblastoma than conventional cytotoxic therapies. Accurate and reproducible immune competent preclinical models are key to understanding mechanisms of action, interactions with other therapies and mechanisms of resistance to immunotherapy. Here we characterized the tumor and splenic microenvironment of two syngeneic subcutaneous (NXS2 and 9464D), and a spontaneous transgenic (TH-MYCN) murine model of neuroblastoma, comparing histological features and immune infiltrates to previously published data on human neuroblastoma. Histological sections of frozen tissues were stained by immunohistochemistry and immunofluorescence for immune cell markers and tumor architecture. Tissues were dissociated by enzymatic digestion, stained with panels of antibodies to detect and quantify cancer cells, along with lymphocytic and myeloid infiltration by flow cytometry. Finally, we tested TH-MYCN mice as a feasible model for immunotherapy, using prior treatment with cyclophosphamide to create a therapeutic window of minimal residual disease to favor host immune development. Immune infiltration differed significantly between all the models. TH-MYCN tumors were found to resemble immune infiltration in human tumors more closely than the subcutaneous models, alongside similar GD2 and MHC class I expression. Finally, TH-MYCN transgenic mice were administered cyclophosphamide alone or in combination with an anti-GD2 or anti-4-1BB monoclonal antibody, which resulted in increase in survival in both combination therapies. The TH-MYCN transgenic mouse is a promising in vivo model for testing immunotherapy compounds and combination therapy in a preclinical setting.
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Affiliation(s)
- Emily R Webb
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Southampton General Hospital (MP127), Tremona Road, Southampton, Hampshire, SO16 6YD, UK.,Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, EH4 2XU, UK
| | - Silvia Lanati
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Southampton General Hospital (MP127), Tremona Road, Southampton, Hampshire, SO16 6YD, UK
| | - Carol Wareham
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Southampton General Hospital (MP127), Tremona Road, Southampton, Hampshire, SO16 6YD, UK
| | - Alistair Easton
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Southampton General Hospital (MP127), Tremona Road, Southampton, Hampshire, SO16 6YD, UK.,Cellular Pathology, University Hospitals Southampton NHS Foundation Trust, Southampton, SO16 6YD, UK.,Department of Oncology, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ, UK
| | - Stuart N Dunn
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Southampton General Hospital (MP127), Tremona Road, Southampton, Hampshire, SO16 6YD, UK
| | - Tatyana Inzhelevskaya
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Southampton General Hospital (MP127), Tremona Road, Southampton, Hampshire, SO16 6YD, UK
| | - Freja M Sadler
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Southampton General Hospital (MP127), Tremona Road, Southampton, Hampshire, SO16 6YD, UK
| | - Sonya James
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Southampton General Hospital (MP127), Tremona Road, Southampton, Hampshire, SO16 6YD, UK
| | - Margaret Ashton-Key
- Cellular Pathology, University Hospitals Southampton NHS Foundation Trust, Southampton, SO16 6YD, UK
| | - Mark S Cragg
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Southampton General Hospital (MP127), Tremona Road, Southampton, Hampshire, SO16 6YD, UK
| | - Stephen A Beers
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Southampton General Hospital (MP127), Tremona Road, Southampton, Hampshire, SO16 6YD, UK
| | - Juliet C Gray
- Antibody and Vaccine Group, Centre for Cancer Immunology, University of Southampton Faculty of Medicine, Southampton General Hospital (MP127), Tremona Road, Southampton, Hampshire, SO16 6YD, UK.
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16
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Seel S, Eacott M, Langston R, Easton A. Cholinergic input to the hippocampus is not required for a model of episodic memory in the rat, even with multiple consecutive events. Behav Brain Res 2018; 354:48-54. [DOI: 10.1016/j.bbr.2017.06.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 06/01/2017] [Indexed: 10/19/2022]
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17
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Iro MA, Sadarangani M, Absoud M, Chong WK, Clark CA, Easton A, Gray V, Kneen R, Lim M, Pike M, Solomon T, Vincent A, Willis L, Yu LM, Pollard AJ. ImmunoglobuliN in the Treatment of Encephalitis (IgNiTE): protocol for a multicentre randomised controlled trial. BMJ Open 2016; 6:e012356. [PMID: 27810972 PMCID: PMC5129051 DOI: 10.1136/bmjopen-2016-012356] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
INTRODUCTION Infectious and immune-mediated encephalitides are important but under-recognised causes of morbidity and mortality in childhood, with a 7% death rate and up to 50% morbidity after prolonged follow-up. There is a theoretical basis for ameliorating the immune response with intravenous immunoglobulin (IVIG), which is supported by empirical evidence of a beneficial response following its use in the treatment of viral and autoimmune encephalitis. In immune-mediated encephalitis, IVIG is often used after a delay (by weeks in some cases), while diagnosis is confirmed. Wider use of IVIG in infectious encephalitis and earlier use in immune-mediated encephalitis could improve outcomes for these conditions. We describe the protocol for the first ever randomised control trial of IVIG treatment for children with all-cause encephalitis. METHODS AND ANALYSIS 308 children (6 months to 16 years) with a diagnosis of acute/subacute encephalitis will be recruited in ∼30 UK hospitals and randomised to receive 2 doses (1 g/kg/dose) of either IVIG or matching placebo, in addition to standard treatment. Recruitment will be over a 42-month period and follow-up of each participant will be for 12 months post randomisation. The primary outcome is 'good recovery' (score of 2 or lower on the Glasgow Outcome Score Extended-paediatric version), at 12 months after randomisation. Additional secondary neurological measures will be collected at 4-6 weeks after discharge from acute care and at 6 and 12 months after randomisation. Safety, radiological, other autoimmune and tertiary outcomes will also be assessed. ETHICS AND DISSEMINATION This trial has been approved by the UK National Research Ethics committee (South Central-Oxford A; REC 14/SC/1416). Current protocol: V4.0 (10/03/2016). The findings will be presented at national and international meetings and conferences and published in peer-reviewed journals. TRIAL REGISTRATION NUMBERS NCT02308982, EudraCT201400299735 and ISRCTN15791925; Pre-results.
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Affiliation(s)
- M A Iro
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford and NIHR Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - M Sadarangani
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford and NIHR Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
- Department of Paediatrics, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, University of British Columbia, Vancouver BC, Canada
| | - M Absoud
- Department of Children's Neurosciences, Evelina London Children's Hospital at Guy's and St Thomas’ NHS Foundation Trust, King's Health Partners Academic Health Science Centre, London, UK
| | - W K Chong
- Department of Radiology, Great Ormond Street Hospital for Children, London, UK
| | - C A Clark
- Institute of Child Health, University College London, London, UK
| | - A Easton
- The Encephalitis Society, Malton, North Yorkshire, UK
| | - V Gray
- Psychological services (Paediatrics), Alder Hey Children's NHS Foundation Trust, Liverpool, UK
| | - R Kneen
- Institute of Infection and Global Health, University of Liverpool, Liverpool, UK
- Littlewoods Neuroscience Foundation, Department of Neurology, Alder Hey Children's NHS Foundation Trust, Liverpool, UK
| | - M Lim
- Department of Children's Neurosciences, Evelina London Children's Hospital at Guy's and St Thomas’ NHS Foundation Trust, King's Health Partners Academic Health Science Centre, London, UK
| | - M Pike
- Department of Paediatric Neurology, Oxford University Hospitals NHS Trust, Oxford, UK
| | - T Solomon
- Institute of Infection and Global Health, University of Liverpool, Liverpool, UK
- National Institute for Health Research Health Protection Research Unit in Emerging and Zoonotic Infections, University of Liverpool, Liverpool, UK
- Walton Centre NHS Foundation Trust, Liverpool, UK
| | - A Vincent
- Department of Clinical Neurosciences, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - L Willis
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford and NIHR Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - L-M Yu
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
| | - A J Pollard
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford and NIHR Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
- Department of Paediatrics, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
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18
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Robertson BA, Eacott M, Easton A. Putting memory in context: Dissociating memories by distinguishing the nature of context. Behav Brain Res 2015; 285:99-104. [DOI: 10.1016/j.bbr.2014.10.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 10/28/2014] [Accepted: 10/29/2014] [Indexed: 10/24/2022]
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19
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Wattal C, Goel N, Khanna S, Byotra SP, Laxminarayan R, Easton A. Impact of informational feedback to clinicians on antibiotic-prescribing rates in a tertiary care hospital in Delhi. Indian J Med Microbiol 2015; 33:255-9. [DOI: 10.4103/0255-0857.153582] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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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20
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Ameen-Ali KE, Eacott MJ, Easton A. A new behavioural apparatus to reduce animal numbers in multiple types of spontaneous object recognition paradigms in rats. J Neurosci Methods 2012; 211:66-76. [PMID: 22917958 DOI: 10.1016/j.jneumeth.2012.08.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 08/02/2012] [Accepted: 08/03/2012] [Indexed: 11/17/2022]
Abstract
Standard object recognition procedures assess animals' memory through their spontaneous exploration of novel objects or novel configurations of objects with other aspects of their environment. Such tasks are widely used in memory research, but also in pharmaceutical companies screening new drug treatments. However, behaviour in these tasks may be driven by influences other than novelty such as stress from handling which can subsequently influence performance. This extra-experimental variance means that large numbers of animals are required to maintain power. In addition, accumulation of data is time consuming as animals typically perform only one trial per day. The present study aimed to explore how effectively recognition memory could be tested with a new continual trials apparatus which allows for multiple trials within a session and reduced handling stress through combining features of delayed nonmatching-to-sample and spontaneous object recognition tasks. In this apparatus Lister hooded rats displayed performance significantly above chance levels in object recognition tasks (Experiments 1 and 2) and in tasks of object-location (Experiment 3) and object-in-context memory (Experiment 4) with data from only five animals or fewer per experimental group. The findings indicated that the results were comparable to those of previous reports in the literature and maintained statistical power whilst using less than a third of the number of animals typically used in spontaneous recognition paradigms. Overall, the results highlight the potential benefit of the continual trials apparatus to reduce the number of animals used in recognition memory tasks.
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Affiliation(s)
- K E Ameen-Ali
- Department of Psychology, University of Durham, Durham DH1 3LE, United Kingdom.
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21
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Klaas M, Oetke C, Lewis LE, Erwig LP, Heikema AP, Easton A, Willison HJ, Crocker PR. Sialoadhesin promotes rapid proinflammatory and type I IFN responses to a sialylated pathogen, Campylobacter jejuni. J Immunol 2012; 189:2414-22. [PMID: 22851711 DOI: 10.4049/jimmunol.1200776] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Sialoadhesin (Sn) is a macrophage (Mφ)-restricted receptor that recognizes sialylated ligands on host cells and pathogens. Although Sn is thought to be important in cellular interactions of Mφs with cells of the immune system, the functional consequences of pathogen engagement by Sn are unclear. As a model system, we have investigated the role of Sn in Mφ interactions with heat-killed Campylobacter jejuni expressing a GD1a-like, sialylated glycan. Compared to Sn-expressing bone marrow-derived macrophages (BMDM) from wild-type mice, BMDM from mice either deficient in Sn or expressing a non-glycan-binding form of Sn showed greatly reduced phagocytosis of sialylated C. jejuni. This was accompanied by a strong reduction in MyD88-dependent secretion of TNF-α, IL-6, IL-12, and IL-10. In vivo studies demonstrated that functional Sn was required for rapid TNF-α and IFN-β responses to i.v.-injected sialylated C. jejuni. Bacteria were captured within minutes after i.v. injection and were associated with Mφs in both liver and spleen. In the spleen, IFN-β-reactive cells were localized to Sn⁺ Mφs and other cells in the red pulp and marginal zone. Together, these studies demonstrate that Sn plays a key role in capturing sialylated pathogens and promoting rapid proinflammatory cytokine and type I IFN responses.
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Affiliation(s)
- Mariliis Klaas
- Division of Cell Signalling and Immunology, College of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
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22
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Solomon T, Michael BD, Smith PE, Sanderson F, Davies NWS, Hart IJ, Holland M, Easton A, Buckley C, Kneen R, Beeching NJ. Management of suspected viral encephalitis in adults--Association of British Neurologists and British Infection Association National Guidelines. J Infect 2012; 64:347-73. [PMID: 22120595 DOI: 10.1016/j.jinf.2011.11.014] [Citation(s) in RCA: 158] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Accepted: 11/13/2011] [Indexed: 12/25/2022]
Abstract
In the 1980s the outcome of patients with herpes simplex encephalitis was shown to be dramatically improved with aciclovir treatment. Delays in starting treatment, particularly beyond 48 h after hospital admission, are associated with a worse prognosis. Several comprehensive reviews of the investigation and management of encephalitis have been published. However, their impact on day-to day clinical practice appears to be limited. The emergency management of meningitis in children and adults was revolutionised by the introduction of a simple algorithm as part of management guidelines. In February 2008 a group of clinicians met in Liverpool to begin the development process for clinical care guidelines based around a similar simple algorithm, supported by an evidence base, whose implementation is hoped would improve the management of patients with suspected encephalitis.
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Affiliation(s)
- T Solomon
- Institute of Infection and Global Health, University of Liverpool, The Apex Building, West Derby Street, Liverpool, UK.
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23
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Kneen R, Michael BD, Menson E, Mehta B, Easton A, Hemingway C, Klapper PE, Vincent A, Lim M, Carrol E, Solomon T. Management of suspected viral encephalitis in children - Association of British Neurologists and British Paediatric Allergy, Immunology and Infection Group national guidelines. J Infect 2011; 64:449-77. [PMID: 22120594 DOI: 10.1016/j.jinf.2011.11.013] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Accepted: 11/13/2011] [Indexed: 12/25/2022]
Abstract
In the 1980s the outcome of patients with herpes simplex encephalitis was shown to be dramatically improved with aciclovir treatment. Delays in starting treatment, particularly beyond 48 h after hospital admission, are associated with a worse prognosis. Several comprehensive reviews of the investigation and management of encephalitis have been published. However, their impact on day-to-day clinical practice appears to be limited. The emergency management of meningitis in children and adults was revolutionised by the introduction of a simple algorithm as part of management guidelines. In February 2008 a group of clinicians met in Liverpool to begin the development process for clinical care guidelines based around a similar simple algorithm, supported by an evidence base, whose implementation is hoped would improve the management of patients with suspected encephalitis.
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Affiliation(s)
- R Kneen
- Alder Hey Children's NHS Foundation Trust, West Derby, Liverpool L12 2AP, UK.
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24
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Greenshields KN, Halstead SK, Zitman FMP, Rinaldi S, Brennan KM, O'Leary C, Chamberlain LH, Easton A, Roxburgh J, Pediani J, Furukawa K, Furukawa K, Goodyear CS, Plomp JJ, Willison HJ. The neuropathic potential of anti-GM1 autoantibodies is regulated by the local glycolipid environment in mice. J Clin Invest 2009; 119:595-610. [PMID: 19221437 DOI: 10.1172/jci37338] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Accepted: 12/22/2008] [Indexed: 01/06/2023] Open
Abstract
Anti-GM1 ganglioside autoantibodies are used as diagnostic markers for motor axonal peripheral neuropathies and are believed to be the primary mediators of such diseases. However, their ability to bind and exert pathogenic effects at neuronal membranes is highly inconsistent. Using human and mouse monoclonal anti-GM1 antibodies to probe the GM1-rich motor nerve terminal membrane in mice, we here show that the antigenic oligosaccharide of GM1 in the live plasma membrane is cryptic, hidden on surface domains that become buried for a proportion of anti-GM1 antibodies due to a masking effect of neighboring gangliosides. The cryptic GM1 binding domain was exposed by sialidase treatment that liberated sialic acid from masking gangliosides including GD1a or by disruption of the live membrane by freezing or fixation. This cryptic behavior was also recapitulated in solid-phase immunoassays. These data show that certain anti-GM1 antibodies exert potent complement activation-mediated neuropathogenic effects, including morphological damage at living terminal motor axons, leading to a block of synaptic transmission. This occurred only when GM1 was topologically available for antibody binding, but not when GM1 was cryptic. This revised understanding of the complexities in ganglioside membrane topology provides a mechanistic account for wide variations in the neuropathic potential of anti-GM1 antibodies.
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Affiliation(s)
- Kay N Greenshields
- Glasgow Biomedical Research Centre, 120 University Place, University of Glasgow, Glasgow, United Kingdom
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Wilson CRE, Baxter MG, Easton A, Gaffan D. Addition of fornix transection to frontal-temporal disconnection increases the impairment in object-in-place memory in macaque monkeys. Eur J Neurosci 2008; 27:1814-22. [PMID: 18380673 PMCID: PMC2327205 DOI: 10.1111/j.1460-9568.2008.06140.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Both frontal-inferotemporal disconnection and fornix transection (Fx) in the monkey impair object-in-place scene learning, a model of human episodic memory. If the contribution of the fornix to scene learning is via interaction with or modulation of frontal-temporal interaction − that is, if they form a unitary system − then Fx should have no further effect when added to frontal-temporal disconnection. However, if the contribution of the fornix is to some extent distinct, then fornix lesions may produce an additional deficit in scene learning beyond that caused by frontal-temporal disconnection. To distinguish between these possibilities, we trained three male rhesus monkeys on the object-in-place scene-learning task. We tested their learning on the task following frontal-temporal disconnection, achieved by crossed unilateral aspiration of the frontal cortex in one hemisphere and the inferotemporal cortex in the other, and again following the addition of Fx. The monkeys were significantly impaired in scene learning following frontal-temporal disconnection, and furthermore showed a significant increase in this impairment following the addition of Fx, from 32.8% error to 40.5% error (chance = 50%). The increased impairment following the addition of Fx provides evidence that the fornix and frontal-inferotemporal interaction make distinct contributions to episodic memory.
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Affiliation(s)
- C R E Wilson
- Department of Experimental Psychology, University of Oxford, Oxford, UK.
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Cuccui J, Easton A, Chu KK, Bancroft GJ, Oyston PCF, Titball RW, Wren BW. Development of signature-tagged mutagenesis in Burkholderia pseudomallei to identify genes important in survival and pathogenesis. Infect Immun 2006; 75:1186-95. [PMID: 17189432 PMCID: PMC1828585 DOI: 10.1128/iai.01240-06] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Burkholderia pseudomallei, the causative agent of melioidosis, is an important human pathogen in Southeast Asia and northern Australia for which a vaccine is unavailable. A panel of 892 double signature-tagged mutants was screened for virulence using an intranasal BALB/c mouse model of infection. A novel DNA tag microarray identified 33 mutants as being attenuated in spleens, while 6 were attenuated in both lungs and spleens. The transposon insertion sites in spleen-attenuated mutants revealed genes involved in several stages of capsular polysaccharide biosynthesis and DNA replication and repair, a putative oxidoreductase, ABC transporters, and a lipoprotein that may be important in intercellular spreading. The six mutants identified as missing in both lungs and spleens were found to have insertions in recA involved in the SOS response and DNA repair; putative auxotrophs of leucine, threonine, p-aminobenzoic acid, and a mutant with an insertion in aroB causing auxotrophy for aromatic compounds were also found. Murine challenge studies revealed partial protection in BALB/c mice vaccinated with the aroB mutant. The refined signature-tagged mutagenesis approach developed in this study was used to efficiently identify attenuating mutants from this highly pathogenic species and could be applied to other organisms.
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Affiliation(s)
- J Cuccui
- Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, University of London, Keppel Street, London WC1E 7HT, United Kingdom
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Abstract
Estrogens modulate almost all aspects of female behavioral arousal; however, apart from that of sexual behavior, the neurobiology of female arousal remains unclear. Because orexins-hypocretins are neurotransmitters known to be important for behavioral arousal, the authors hypothesized that orexins may be a target for estrogen. Gonadectomized female mice received an intracerebral injection of either phosphate-buffered saline, the neurotoxin saporin (SAP), or the orexin-2-saporin conjugate (OXSAP) in the lateral hypothalamus. SAP- and OXSAP-treated mice were also divided into groups receiving either estradiol capsules or oil capsules. Mice were tested in 3 behavioral tests measuring different modes of arousal: sensory responsiveness, running wheel activity, and fearfulness. OXSAP mice showed decreases in sensory responsiveness and fearfulness concomitant with a reduction in orexin cell number. Estradiol affected all behaviors tested but decreased fearfulness only when combined with OXSAP treatment. These data indicate that estrogens modulate orexins' effects on fearfulness.
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Affiliation(s)
- A Easton
- Department of Neurobiology and Behavior, Rockefeller University, New York, NY 10021, USA.
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Kow LM, Easton A, Pfaff DW. Acute estrogen potentiates excitatory responses of neurons in rat hypothalamic ventromedial nucleus. Brain Res 2005; 1043:124-31. [PMID: 15862525 DOI: 10.1016/j.brainres.2005.02.068] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2004] [Revised: 02/16/2005] [Accepted: 02/23/2005] [Indexed: 02/05/2023]
Abstract
In a previous behavioral study, brief application of a membrane-limited estrogen to neurons in rat hypothalamic ventromedial nucleus (VMN) facilitated lordosis behavior-inducing genomic actions of estrogen. Here, electrophysiological recordings from single neurons were employed to characterize these membrane-initiated actions. From rat hypothalamic slices, electrical activity was recorded from neurons in the ventrolateral VMN, the cell group crucial for estrogen induction of lordosis. In addition to the resting activity, neuronal responses to histamine (HA) and N-methyl-d-aspartate (NMDA) were also recorded before, during, and after a brief (10-15 min) application of estradiol (E, 10 nM). These two transmitters were chosen because their actions are mediated by different mechanisms: HA through G protein-coupled receptors and NMDA by ligand-activated ion channels. Vehicle applications did not affect either resting activity or neuronal responses. In contrast, acute E exposure modulated neuronal responses to transmitters, with no significant effect on the resting activity. It potentiated excitatory responses to HAs (20 out of 48 cells tested) and to NMDA (10 out of 19 cells), but attenuated inhibitory responses to HA (3 out of 6 units). Both of these hormonal actions would increase VMN neuronal excitation. In separate experiments, neuronal excitation was found to be suppressed by anesthetics, which would block E's induction of lordosis when administered at the time of estrogen application. These data are consistent with the notion that increasing electrical excitation of VMN neurons can be a mechanism by which acute E exposure facilitates the lordosis-inducing genomic actions of estrogens.
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Affiliation(s)
- L-M Kow
- Lab. of Neurobiology and Behavior, The Rockefeller University, New York, NY 10021-6399, USA.
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Easton A, Norton J, Goodwillie A, Pfaff DW. Sex differences in mouse behavior following pyrilamine treatment: role of histamine 1 receptors in arousal. Pharmacol Biochem Behav 2005; 79:563-72. [PMID: 15582029 DOI: 10.1016/j.pbb.2004.09.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [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] [Received: 04/11/2004] [Revised: 09/09/2004] [Accepted: 09/10/2004] [Indexed: 10/26/2022]
Abstract
Arousal, the activation of brain and behavior, is a fundamental component of behavior. While sex differences in behavior are pervasive, it is unknown whether they could be due to an underlying dimorphism in arousal mechanisms. Because histamine (HA) acting through histamine 1 (H1) receptors is one essential component of arousal neural circuitry, the aim of the current experiment was to measure sex differences in behavioral arousal following treatment with the H1 receptor antagonist, pyrilamine (PYRL). Castrated male and ovariectomized female Swiss-Webster mice were treated subcutaneously with either 15 or 35 mg/kg of PYRL. The effect of drug treatment was determined in an array of behaviors: sensory responsiveness, running wheel activity, and fearfulness. Surprisingly, the lower dose of PYRL increased some aspects of arousal, sensory responsiveness, and anxiety-like behavior, while the higher dose of PYRL resulted in decreases in arousal across tests, indicating that antagonism of histamine receptors does not have a linear relationship with arousal. Females were more sensitive to the arousal-reducing effects of PYRL than males in sensory and running wheel tasks but not in tests of emotion. In conclusion, antagonism of H1 receptors can alter arousal in a sex-dependent manner, independent of circulating gonadal steroids, in mice.
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Affiliation(s)
- A Easton
- Laboratory of Neurobiology and Physiology, Box #275, Rockefeller University, New York, NY 10021, USA.
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Readman JW, Devilla RA, Tarran G, Llewellyn CA, Fileman TW, Easton A, Burkill PH, Mantoura RFC. Flow cytometry and pigment analyses as tools to investigate the toxicity of herbicides to natural phytoplankton communities. Mar Environ Res 2004; 58:353-358. [PMID: 15178054 DOI: 10.1016/j.marenvres.2004.03.081] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Characterisation of natural phytoplanktonic communities is currently being advanced through flow cytometry and high resolution pigment analyses. To date, toxicological methods to assess impacts of herbicides on natural phytoplankton populations are lacking. Here, we report the novel use of these techniques in combination to study changes in phytoplankton populations exposed to 2-methylthio-4-tertiary-butylamino-6-cyclopropylamino-s-triazine (Irgarol 1051), a herbicide used in antifouling paints. Flow cytometry results revealed that following a 72-h exposure to approximately 100 ngL(-1), eukaryote abundance was less than half that in the controls. High performance liquid chromatographic analyses of pigments demonstrated that 19'-hexanoyloxyfucoxanthin was selectively lost relative to the control. This carotenoid is specific to the prymnesiophytes which are key constituents of phytoplanktonic communities within temperate marine waters. Values of EC(50) (72 h) as low as 70 ngL(-1) were calculated from the selective reduction in this compound. Concentrations substantially exceeding this level have been reported in UK and other European coastal waters.
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Affiliation(s)
- J W Readman
- Plymouth Marine Laboratory, Prospect Place, West Hoe, Plymouth, Devon PL1 3DH, UK.
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Easton A, Kiss E, Mowery P. Budapest Student Health Behavior Survey--Budapest, Hungary, 1999. Findings on unintentional and intentional injuries, alcohol use, and sexual activity. Cent Eur J Public Health 2004; 12:94-101. [PMID: 15242028] [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: 04/30/2023]
Abstract
OBJECTIVE In Hungary, a large proportion of adult morbidity and mortality can be attributed to health risk behaviors that begin in early adolescence. To date, studies examining health risk behaviors among youth have rarely been undertaken in Hungary. In order to expand current research in this area, the Hungarian Metropolitan Institute of State Public Health and Public Health Officer Service and the Office on Smoking and Health at the U.S. Centers for Disease Control and Prevention developed and implemented the Budapest Student Health Behavior Survey. The objective of this study was to examine health behavior risk factors among secondary school students in Budapest in 1999. METHODS The 1999 Budapest Student Health Behavior Survey is cross-sectional school-based survey A 2-stage cluster sampling design was used to produce a representative sample of secondary students in grades 9-12 in Budapest. Information was collected on unintentional and intentional injuries, alcohol use, and sexual activity. FINDINGS During the 30 days preceding the survey, 28.7% of students had rarely or never worn a seatbelt and 68.1% drunk alcohol. During the 12 months preceding the survey, 14.5% had been threatened or injured with a weapon, 12.9% experienced dating violence, and 13.5% seriously considered suicide. Of the 44.7% of students who had had sexual intercourse, 29.5% had > or = 4 sex partners. Of sexually active students, 50.4% had not used a condom at last sexual intercourse. CONCLUSION Many secondary school students in Budapest practice behaviors that place them at risk for serious health problems both in the short and long-term. Programs and policies that adequately address such behaviors among secondary school students are needed to reduce subsequent morbidity and mortality.
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Affiliation(s)
- A Easton
- Office on Smoking and Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA.
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Easton A, Parker K, Derrington AM, Parker A. Behaviour of marmoset monkeys in a T-maze: comparison with rats and macaque monkeys on a spatial delayed non-match to sample task. Exp Brain Res 2003; 150:114-6. [PMID: 12698223 DOI: 10.1007/s00221-003-1409-5] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Received: 12/02/2002] [Accepted: 02/05/2003] [Indexed: 10/20/2022]
Abstract
The marmoset ( Callithrix jacchus) is a small New World monkey that is increasingly being used in a laboratory setting. A previous set of studies has provided a direct comparison between the performance of rats and macaque monkeys on a spatial delayed non-match to sample task in a T-maze (Murray et al. 1989, Experimental Brain Research 74:173-186; Markowska et al. 1989, Experimental Brain Research 74:187-201). In the current experiment we replicated these studies using the marmoset. This allowed for a comparison of the behavioural performance of the marmoset with both rats and macaque monkeys. Marmosets performed well at the task, performing better than macaques, and at a similar level to rats. A closer analysis of the data from the present experiment suggests that marmosets spontaneously alternated in the T-maze, a strategy often adopted by rats, but not by macaques in the T-maze.
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Affiliation(s)
- A Easton
- School of Psychology, University of Nottingham, University Park, NG7 2RD, Nottingham, UK.
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Abstract
Disturbances of circadian rhythms are associated with many types of mood disorders; however, it is unknown whether a dysfunctional circadian pacemaker can be the primary cause of altered emotional behavior. To test this hypothesis, male and female mice carrying a mutation of the circadian gene, Clock, were compared to wild-type mice in an array of behavioral tests used to measure exploratory activity, anxiety, and behavioral despair. Female Clock mutant mice exhibited significantly greater activity and rearing in an open field and a greater number of total arm entries in the elevated plus maze. In addition, female Clock mutant mice spent significantly more time swimming in the forced swim test than wild-type mice on both days of a 2-day test. Male Clock mutant mice also exhibited increased exploration of the open field and increased swimming in the forced swim test; however, behavioral changes were less robust in Clock mutant males compared to Clock mutant females. These changes in behavior were not dependent on the expression of a lengthened free-running period but were more or less striking depending on the testing conditions. These data indicate that the Clock mutation leads to increased exploratory behavior and increased escape-seeking behavior, and, conversely, does not result in increased anxiety or depressive-like behavior. These results suggest that the Clock gene is involved in regulating behavioral arousal, and that Clock may interact with sex hormones to produce these behavioral changes.
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Affiliation(s)
- A Easton
- Department of Neurobiology and Physiology, Northwestern University, Evanston, IL 60208, USA.
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Easton A, Ridley RM, Baker HF, Gaffan D. Unilateral lesions of the cholinergic basal forebrain and fornix in one hemisphere and inferior temporal cortex in the opposite hemisphere produce severe learning impairments in rhesus monkeys. Cereb Cortex 2002; 12:729-36. [PMID: 12050084 DOI: 10.1093/cercor/12.7.729] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
It has been proposed that isolation of the inferior temporal cortex and medial temporal lobe from their cholinergic afferents results in a severe anterograde amnesia. To test this hypothesis directly, seven rhesus monkeys received a unilateral immunotoxic lesion of the cholinergic cells of the basal forebrain with an ipsilesional section of the fornix. In a second surgery, inferior temporal cortex was ablated in the opposite hemisphere. All animals were severely impaired at learning visual scenes and object-reward associations. The impairment in learning scenes was correlated with cholinergic cell loss in the basal forebrain, but not with generalized tissue damage. Two monkeys served as surgical controls with saline injection in place of the immunotoxin, but all other procedures the same, and were not as severely impaired as those with immunotoxic lesions. Previous work has shown that monkeys with bilateral section of the anterior temporal stem (white matter of the temporal lobe), amygdala and fornix show a severe new learning impairment, and provide a model of human medial temporal lobe amnesia. One effect of this combined ablation is to isolate inferior temporal cortex and medial temporal lobe from their cholinergic afferents, possibly in addition to a direct disruption of the hippocampal system. The results of the present study, then, provide a novel link between the mechanisms of medial temporal lobe amnesia and Alzheimer's disease in which the cholinergic basal forebrain shows pathology. We propose that in both cases the mnemonic impairments result from isolating inferior temporal cortex and medial temporal lobe from their cholinergic afferents, possibly in addition to a direct disruption of the hippocampal system.
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Affiliation(s)
- A Easton
- Department of Experimental Psychology, Oxford University, Oxford, UK.
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Abstract
OBJECTIVES The Women Physicians' Health Study (WPHS) offers a unique opportunity to examine the counseling and screening practices of women physicians in various specialties. In this study we describe the prevalence of self-reported counseling on smoking cessation among non-primary care women physicians and examine the association between their demographic, professional, and personal characteristics and such counseling on smoking cessation. METHODS Conducted in 1993-1994, WPHS is a nationally representative cross-sectional mailed survey of U.S. women physicians with 4,501 respondents representing all major specialties. Physicians in 9 specialty areas were grouped in 6 categories: (1) anesthesiology; (2) general surgery and surgical subspecialties; (3) emergency medicine; (4) medical subspecialties; (5) psychiatry; and (6) other. Frequent counseling was defined as having counseled patients who were known smokers at every visit or at least once a year. RESULTS Overall, 45% of the physicians frequently counseled smokers to quit. Medical subspecialists (80%) were most likely and psychiatrists (29%) least likely to counsel frequently. Specialty, perceived relevance of counseling to the physician's practice, and self-confidence in counseling about smoking cessation were associated with frequent counseling. CONCLUSION Cessation counseling by non-primary care physicians can reduce tobacco-related morbidity and mortality. Increasing perceived relevance and self-confidence among this group of physicians, combined with implementation of system changes and the creation of physician accountability can facilitate the provision of such counseling.
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Affiliation(s)
- A Easton
- Office on Smoking and Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA.
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Easton A, Husten C, Malarcher A, Elon L, Caraballo R, Ahluwalia I, Frank E. Smoking cessation counseling by primary care women physicians: Women Physicians' Health Study. Women Health 2001; 32:77-91. [PMID: 11548137 DOI: 10.1300/j013v32n04_05] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVES The Women Physicians' Health Study (WPHS) offers a unique opportunity to examine the counseling and screening practices of women physicians. The objectives of this study were to: describe the prevalence of self-reported smoking cessation counseling among primary care women physicians and determine the association between physician demographic, professional, and personal characteristics and smoking cessation counseling. METHODS Conducted in 1993-1994, WPHS is a nationally representative cross-sectional mailed survey of U.S. women physicians and included 4,501 respondents representing all major specialties. Primary care physicians included 5 specialty areas and were grouped into 3 categories: (1) general primary care; (2) obstetrics/gynecology (ob/gyn); and (3) pediatrics. Frequent counseling was defined as having counseled patients who were known smokers at every visit or at least once a year. RESULTS Women physicians in general primary care (84%) and ob/gyn (83%) were more likely to frequently counsel their patients about cessation than were pediatricians (41%). Perceived relevance of counseling to a physician's practice was significantly associated with frequent counseling. Personal characteristics (current smoking status, personal or family history of a smoking-related disease, or living with a smoker as an adult or child) were not significantly correlated with counseling. CONCLUSION The majority (71%) of physicians reported frequently counseling their patients. However, there was significant variation by physician specialty. In addition, perceived relevance of counseling was strongly associated with counseling behavior. Physician counseling on cessation can reduce tobacco-related morbidity and mortality. Increasing perceived relevance, implementing system changes, and creating accountability can facilitate cessation counseling by physicians.
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Affiliation(s)
- A Easton
- Office on Smoking and Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA.
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Abstract
Sleep is generally considered to be a recovery from prior wakefulness. The architecture of sleep not only depends on the duration of wakefulness but also on its quality in terms of specific experiences. In the present experiment, we studied the effects of restraint stress on sleep architecture and sleep electroencephalography (EEG) in different strains of mice (C57BL/6J and BALB/cJ). One objective was to determine if the rapid eye movement (REM) sleep-promoting effects of restraint stress previously reported for rats would also occur in mice. In addition, we examined whether the effects of restraint stress on sleep are different from effects of social defeat stress, which was found to have a non-REM (NREM) sleep-promoting effect. We further measured corticosterone and prolactin levels as possible mediators of restraint stress-induced changes in sleep. Adult male C57BL/6J and BALB/cJ mice were subjected to 1 h of restraint stress in the middle of the light phase. To control for possible effects of sleep loss per se, the animals were also kept awake for 1 h by gentle handling. Restraint stress resulted in a mild increase in NREM sleep compared with baseline, but, overall, this effect was not significantly different from sleep deprivation by gentle handling. In contrast, restraint stress caused a significant increase in REM sleep compared with handling in the C57BL/6J mice but not in BALB/cJ mice. Corticosterone levels were significantly and similarly elevated after restraint in both strains, but prolactin was increased only in the C57BL/6J mice. In conclusion, this study shows that the restraint stress-induced increase in REM sleep in mice is strongly strain dependent. The concomitant increases in prolactin and REM sleep in the C57BL/6J mice, but not in BALB/cJ mice, suggest prolactin may be involved in the mechanism underlying restraint stress-induced REM sleep. Furthermore, this study confirms that different stressors differentially affect NREM and REM sleep. Whereas restraint stress promotes REM sleep in C57BL/6J mice, we previously found that in the same strain, social defeat stress promotes NREM sleep. As such, studying the consequences of specific stressful stimuli may be an important tool to unravel both the mechanism and function of different sleep stages.
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Affiliation(s)
- P Meerlo
- Department of Neurobiology and Physiology, Northwestern University, 2153 North Campus Dr., Evanston, IL 60208, USA.
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Abstract
OBJECTIVES To collect estimates of smoking prevalence among lesbian, gay, and bisexual people from the published literature and to compare with general population estimates. METHODS Databases were searched for all studies published in English on tobacco use among lesbians, gays, and bisexuals. From 1987 through 2000, twelve studies were identified (four youth, eight adult): seven were based on convenience samples; one on a population-based probability sample; one involved random sampling within selected census tracts; one was based on a large multicenter clinical trial; and two were representative school-based samples. Study findings were compared to national survey data from the corresponding time period. RESULTS Estimated smoking rates for lesbians, gays, and bisexuals ranged from 38% to 59% among youth and from 11% to 50% among adults. National smoking rates during comparable periods ranged from 28% to 35% for adolescents and were approximately 28% for adults. CONCLUSIONS While information in the published literature is limited, it appears that smoking rates are higher among adolescent and adult lesbians, gays, and bisexuals than in the general population. Steps should be taken to ensure representation of lesbians, gays, and bisexuals in tobacco-use surveillance and to collect data in order to understand the apparent high smoking rates in these groups. Attempts should be made to target prevention and cessation interventions to lesbians, gays, and bisexuals.
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Affiliation(s)
- H Ryan
- Office on Smoking and Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341-3717, USA.
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Easton A, Parker A, Gaffan D. Crossed unilateral lesions of medial forebrain bundle and either inferior temporal or frontal cortex impair object recognition memory in Rhesus monkeys. Behav Brain Res 2001; 121:1-10. [PMID: 11275279 DOI: 10.1016/s0166-4328(00)00384-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In monkeys, section of the fornix, amygdala and anterior temporal stem results in a severe anterograde amnesia. Immunolesions of the cholinergic cells of the basal forebrain suggest that this amnesia is a result of isolating the inferior temporal cortex and medial temporal lobe from their cholinergic basal forebrain afferents. In this experiment, six monkeys were trained in a delayed match-to-sample task and then received a section of the medial forebrain bundle in one hemisphere and an ablation of either the frontal or inferior temporal cortex in the opposite hemisphere. All the animals were severely impaired in the performance of this task following this surgery, and the severity of the impairment was independent of the cortical area from which the medial forebrain bundle was disconnected. These results support a model of fronto-temporal interaction via the basal forebrain in new learning, in which midbrain sites related to reward modulate the cholinergic basal forebrain activity.
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Affiliation(s)
- A Easton
- Department of Experimental Psychology, Oxford University, South Parks Road, Oxford OX1 3UD, UK.
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Abstract
We have previously shown that the dithiocarbamate fungicide, Mancozeb, strongly induces lacZ reporter expression from an endogenous heat-shock promoter (hsp16) in the PC72 transgenic strain of the nematode Caenorhabditis elegans. Such evidence of organismal stress, in a nontarget species at subapplication concentrations, was much less apparent for the related fungicide, Maneb, which only weakly induced reporter expression. We now show that reporter induction by Mancozeb is marginal (<60%) after a few hours' exposure, but increases substantially (to almost 10-fold) after overnight exposure. In conjunction with our previous results using intermediate exposure periods, this suggests that the factor limiting reporter responses is likely to be a slow rate of uptake and/or metabolism of the fungicide. We confirm that a potentially toxic metabolite of dithiocarbamate fungicides, namely ethylenethiourea (ETU), has minimal toxicity toward C. elegans, even after prolonged exposure at high concentrations. We demonstrate that exposure to Mancozeb (but not ETU) significantly inhibits larval growth in C. elegans, although this parameter is not markedly more sensitive than reporter induction as a toxicological endpoint. Finally, we have used two-dimensional electrophoresis to show that high concentrations of both Maneb and Mancozeb drastically simplify the protein spot profile compared with controls. However, only in the latter case is there evidence of novel proteins being induced. Both fungicides appear toxic to C. elegans, but only Mancozeb induces a strong heat-shock response.
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Affiliation(s)
- A Easton
- School of Life and Environmental Sciences, University of Nottingham, University Park, UK
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Easton A, Gaffan D. Comparison of perirhinal cortex ablation and crossed unilateral lesions of the medial forebrain bundle from the inferior temporal cortex in the rhesus monkey: effects on learning and retrieval. Behav Neurosci 2001. [PMID: 11142637 DOI: 10.1037//0735-7044.114.6.1041] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Seven monkeys learned new object-reward associations and scene problems and were overtrained on 100 problems of each type. Four monkeys received crossed lesions of the medial forebrain bundle (MFB) and inferior temporal cortex, with the later addition of a fornix section ipsilateral to the MFB lesion. The remaining 3 monkeys received bilateral perirhinal cortex ablation. Disconnection of the MFB from the inferior temporal cortex impaired postoperative new learning, but the retrieval of problems overtrained preoperatively was relatively preserved. Subjects with perirhinal cortex ablation were severely impaired in new learning and at the retrieval of scene problems, but retention of object-reward associations was relatively well preserved. The results support the hypothesis that isolation of the inferior temporal cortex from basal forebrain and midbrain afferents results in dense anterograde amnesia, whereas the role of the perirhinal cortex in learning is dependent on the perceptual difficulty of the task.
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Affiliation(s)
- A Easton
- Department of Experimental Psychology, Oxford University, England.
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Abstract
The traditional explanation of dense amnesia after medial temporal lesions is that the amnesia is caused by damage to the hippocampus and related structures. An alternative view is that dense amnesia after medial temporal lesions is caused by the interruption of afferents to the temporal cortex from the basal forebrain. These afferents travel to the temporal cortex through three pathways, namely the anterior temporal stem, the amygdala and the fornix-fimbria, and all these three pathways are damaged in dense medial temporal amnesia. In four experiments using different memory tasks, we tested the effects on memory of sectioning some or all of these three pathways in macaque monkeys. In a test of scene-specific memory for objects, which is analogous in some ways to human episodic memory, section of fornix alone, or section of amygdala and anterior temporal stem sparing the fornix, each produced a significant but mild impairment. When fornix section was added to the section of anterior temporal stem and amygdala in this task, however, a very severe impairment resulted. In an object recognition memory task (delayed matching-to-sample) a severe impairment was seen after section of anterior temporal stem and amygdala alone, with or without the addition of fornix section; this impairment was significantly more severe than that which was seen in the same task after amygdalectomy leaving the temporal stem intact, with or without fornix section. Animals with combined section of anterior temporal stem, amygdala and fornix were also impaired in object-reward association learning. However, the retention of pre-operatively acquired object-reward associations was at a high level. These results show that the pattern of impairments after section of anterior temporal stem, amygdala and fornix in the monkey, leaving hippocampus intact, resembles human dense amnesia and is different from the effects of hippocampal lesions in the monkey.
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Affiliation(s)
- D Gaffan
- Department of Experimental Psychology, South Parks Road, OX1 3UD, Oxford, UK.
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Easton A, Gaffan D. Crossed unilateral lesions of the medial forebrain bundle and either inferior temporal or frontal cortex impair object-reward association learning in Rhesus monkeys. Neuropsychologia 2001; 39:71-82. [PMID: 11115656 DOI: 10.1016/s0028-3932(00)00098-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
In an accompanying paper we showed that combined transection of the fornix, amygdala and temporal stem in monkeys produced dense amnesia, including an impairment in visual object-reward association learning. We proposed that this combined surgical section had its effect by isolating temporal cortex from the ascending projections of the basal forebrain and midbrain structures. To test this hypothesis, in the present experiment we disconnected the inferior temporal cortex from these basal forebrain and midbrain structures, while sparing cortical white matter, by crossed unilateral lesions of the medial forebrain bundle in one hemisphere and inferior temporal cortex in the opposite hemisphere. The aim of the medial forebrain bundle lesion was to section axons of cells, both those that project to the cortex via the medial forebrain bundle, and those which control the activity of these same structures. A single unilateral lesion alone had no effect on the ability to learn and remember visual object-reward associations, but the crossed unilateral lesions produced an impairment in this task which was equal in severity to the impairment seen earlier after bilateral section of the fornix, amygdala and temporal stem. The impairment was not an effect of interrupting fibres to the cortex from the ventromedial hypothalamus, or of unilateral sensory neglect. This supports the hypothesis that these midbrain and basal forebrain afferents to the inferior temporal cortex are important for new visual learning. Furthermore, an impairment of equal severity was demonstrated in a separate group of animals that received crossed unilateral lesions of the medial forebrain bundle in one hemisphere and of the frontal cortex in the opposite hemisphere. We propose that the frontal cortex acts to modulate basal forebrain activity which in turn reinforces object representations in the inferior temporal cortex during learning.
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Affiliation(s)
- A Easton
- Department of Experimental Psychology, South Parks Rd, Oxford University, OX1 3UD, Oxford, UK.
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Easton A, Gaffan D. Comparison of perirhinal cortex ablation and crossed unilateral lesions of the medial forebrain bundle from the inferior temporal cortex in the rhesus monkey: effects on learning and retrieval. Behav Neurosci 2000; 114:1041-57. [PMID: 11142637 DOI: 10.1037/0735-7044.114.6.1041] [Citation(s) in RCA: 27] [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: 11/08/2022]
Abstract
Seven monkeys learned new object-reward associations and scene problems and were overtrained on 100 problems of each type. Four monkeys received crossed lesions of the medial forebrain bundle (MFB) and inferior temporal cortex, with the later addition of a fornix section ipsilateral to the MFB lesion. The remaining 3 monkeys received bilateral perirhinal cortex ablation. Disconnection of the MFB from the inferior temporal cortex impaired postoperative new learning, but the retrieval of problems overtrained preoperatively was relatively preserved. Subjects with perirhinal cortex ablation were severely impaired in new learning and at the retrieval of scene problems, but retention of object-reward associations was relatively well preserved. The results support the hypothesis that isolation of the inferior temporal cortex from basal forebrain and midbrain afferents results in dense anterograde amnesia, whereas the role of the perirhinal cortex in learning is dependent on the perceptual difficulty of the task.
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Affiliation(s)
- A Easton
- Department of Experimental Psychology, Oxford University, England.
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Daniels NA, Ray B, Easton A, Marano N, Kahn E, McShan AL, Del Rosario L, Baldwin T, Kingsley MA, Puhr ND, Wells JG, Angulo FJ. Emergence of a new Vibrio parahaemolyticus serotype in raw oysters: A prevention quandary. JAMA 2000; 284:1541-5. [PMID: 11000648 DOI: 10.1001/jama.284.12.1541] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
CONTEXT In May and June 1998, reported Vibrio parahaemolyticus infections increased sharply in Texas. OBJECTIVE To determine factors that contributed to the increase in V parahaemolyticus infections. DESIGN, SETTING, AND PARTICIPANTS Cross-sectional survey of persons reporting gastroenteritis after eating seafood in Texas; survey of environmental conditions in Galveston Bay. MAIN OUTCOME MEASURES Traceback of oysters, water quality measures in harvest areas, presence of V parahaemolyticus in stool cultures; comparison of median values for environmental conditions before and during the outbreak compared with during the previous 5 years. RESULTS Between May 31 and July 10, 1998, 416 persons in 13 states reported having gastroenteritis after eating oysters harvested from Galveston Bay. All 28 available stool specimens from affected persons yielded V parahaemolyticus serotype O3:K6 isolates. Oyster beds met current bacteriologic standards during harvest and fecal coliform counts in water samples were within acceptable limits. Median water temperature and salinity during May and June 1998 were 30.0 degrees C and 29.6 parts per thousand (ppt) compared with 28.9 degrees C and 15.6 ppt for the previous 5 years (P<.001). CONCLUSIONS This is the first reported outbreak of V parahaemolyticus serotype O3:K6 infection in the United States. The emergence of a virulent serotype and elevated seawater temperatures and salinity levels may have contributed to this large multistate outbreak of V parahaemolyticus. Bacteriologic monitoring at harvest sites did not prevent this outbreak, suggesting that current policy and regulations regarding the safety of raw oysters require reevaluation. Consumers and physicians should understand that raw or undercooked oysters can cause illness even if harvested from monitored beds. In patients who develop acute gastroenteritis within 4 days of consuming raw or undercooked oysters, a stool specimen should be tested for Vibrio species using specific media. JAMA. 2000;284:1541-1545.
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Affiliation(s)
- N A Daniels
- Division of General Internal Medicine, Department of Medicine, University of California, San Francisco, 1701 Divisadero, Suite 500, San Francisco, CA 94115, USA.
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Abstract
PURPOSE The nucleus of the solitary tract (NTS) is a primary site at which vagal afferents terminate. Because afferent vagal nerve stimulation has been demonstrated to have anticonvulsant effects, it is likely that changes in synaptic transmission in the NTS can regulate seizure susceptibility. We tested this hypothesis by examining the influence of gamma-aminobutyric acid (GABA) ergic and glutamatergic transmission in the NTS on seizures evoked by systemic and focal bicuculline and systemic pentylenetetrazol (PTZ) in rats. METHODS Muscimol (256 pmol), a GABA(A)-receptor agonist, bicuculline methiodide (177 pmol), a GABA(A)-receptor antagonist, kynurenate (634 pmol), a glutamate-receptor antagonist, or lidocaine (100 nl; 5%), a local anesthetic, was microinjected into the mediocaudal (m)NTS. Ten minutes later, seizure activity was induced by either a focal microinfusion of bicuculline methiodide (177 pmol) into the rostral piriform cortex, systemic PTZ (50 mg/kg, i.p.), or systemic bicuculline (0.35 mg/kg, i.v.). RESULTS Muscimol in mNTS (but not in adjacent regions of NTS) attenuated seizures in all seizure models tested, whereas bicuculline methiodide into mNTS did not alter seizure responses. Kynurenate infusions into mNTS significantly reduced the severity of seizures evoked both systemically and focally. Anticonvulsant effects also were obtained with lidocaine application into the same region of mNTS. Unilateral injections were sufficient to afford seizure protection. CONCLUSIONS Our results demonstrate that an increase in GABA transmission or a decrease in glutamate transmission in the rat mNTS reduces susceptibility to limbic motor seizures. This suggests that inhibition of mNTS outputs enhances seizure resistance in the forebrain and provides a potential mechanism for the seizure protection obtained with vagal stimulation.
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Affiliation(s)
- B R Walker
- Department of Pharmacology, Georgetown University Medical Center, Washington, DC, USA
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Easton A. Leptospirosis in Philippine floods. BMJ 1999; 319:212. [PMID: 10417074 PMCID: PMC1116321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Easton A. New virus is identified in Malaysia epidemic. BMJ 1999; 318:1232. [PMID: 10231244 PMCID: PMC1115639 DOI: 10.1136/bmj.318.7193.1232b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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