1
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Graham ME, Merrick C, Akiyama BM, Szucs MJ, Leach S, Kieft JS, Beckham JD. Zika virus dumbbell-1 structure is critical for sfRNA presence and cytopathic effect during infection. mBio 2023; 14:e0110823. [PMID: 37417764 PMCID: PMC10470596 DOI: 10.1128/mbio.01108-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 05/02/2023] [Accepted: 05/30/2023] [Indexed: 07/08/2023] Open
Abstract
All flaviviruses contain conserved RNA structures in the 3' untranslated region (3' UTR) that are important for flavivirus RNA replication, translation, and pathogenesis. Flaviviruses like Zika virus (ZIKV) contain multiple conserved RNA structures in the viral 3' UTR, including the structure known as dumbbell-1 (DB-1). Previous research has shown that the DB-1 structure is important for flavivirus positive-strand genome replication, but the functional role of the flavivirus DB-1 structure and the mechanism by which it contributes to viral pathogenesis are not known. Using the recently solved flavivirus DB RNA structural data, we designed two DB-1 mutant ZIKV infectious clones, termed ZIKV-TL.PK and ZIKV-p.2.5', which disrupt DB-1 tertiary folding. We found that viral positive-strand genome replication of both ZIKV DB-1 mutant clones is similar to wild-type (WT) ZIKV, but ZIKV DB-1 mutants exhibit significantly decreased cytopathic effect due to reduced caspase-3 activation. We next show that ZIKV DB-1 mutants exhibit decreased levels of sfRNA species compared to ZIKV-WT during infection. However, ZIKV DB-1 mutant 3' UTRs exhibit unchanged sfRNA biogenesis following XRN1 degradation in vitro. We also found that ZIKV DB-1 mutant virus (ZIKV-p.2.5') exhibited enhanced sensitivity to type I interferon treatment, and both ZIKV-DB-1 mutants exhibit reduced morbidity and mortality due to tissue-specific attenuated viral replication in brain tissue of interferon type I/II receptor knockout mice. We propose that the flavivirus DB-1 RNA structure maintains sfRNA levels during infection despite maintained sfRNA biogenesis, and these results indicate that ZIKV DB-dependent maintenance of sfRNA levels support caspase-3-dependent, cytopathic effect, type I interferon resistance, and viral pathogenesis in mammalian cells and in a ZIKV murine model of disease. IMPORTANCE The group of viruses termed flaviviruses cause important disease throughout the world and include dengue virus, Zika virus, Japanese encephalitis virus, and many more. All of these flaviviruses have highly conserved RNA structures in the untranslated regions of the virus genome. One of the shared RNA structures, termed the dumbbell region, is not well studied, but mutations in this region are important for vaccine development. In this study, we made structure-informed targeted mutations in the Zika virus dumbbell region and studied the effect on the virus. We found that Zika virus dumbbell mutants are significantly weakened or attenuated due to a decreased ability to produce non-coding RNA that is needed to support infection, support virus-induced cell death, and support escape from the host immune system. These data show that targeted mutations in the flavivirus dumbbell RNA structure may be an important approach to develop future vaccine candidates.
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Affiliation(s)
- Monica E. Graham
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Camille Merrick
- Department of Medicine, Division of Infectious Diseases, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Benjamin M. Akiyama
- Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Matthew J. Szucs
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Sarah Leach
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Jeffery S. Kieft
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado, USA
- Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - J. David Beckham
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, Colorado, USA
- Department of Medicine, Division of Infectious Diseases, University of Colorado School of Medicine, Aurora, Colorado, USA
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2
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Shirai T, Nakai A, Ando E, Fujimoto J, Leach S, Arimori T, Higo D, van Eerden FJ, Tulyeu J, Liu YC, Okuzaki D, Murayama MA, Miyata H, Nunomura K, Lin B, Tani A, Kumanogoh A, Ikawa M, Wing JB, Standley DM, Takagi J, Suzuki K. Celastrol suppresses humoral immune responses and autoimmunity by targeting the COMMD3/8 complex. Sci Immunol 2023; 8:eadc9324. [PMID: 37000855 DOI: 10.1126/sciimmunol.adc9324] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
Celastrol, a bioactive molecule extracted from the
Tripterygium wilfordii
plant, has been shown to exhibit anti-inflammatory properties. However, its mechanism of action has not been fully elucidated. Here, we show that celastrol suppresses humoral immune responses and autoimmunity by disabling a protein complex consisting of copper metabolism MURR1 domain–containing (COMMD) 3 and COMMD8 (COMMD3/8 complex), a signaling adaptor for chemoattractant receptors. Having demonstrated the involvement of the COMMD3/8 complex in a mouse model of rheumatoid arthritis, we identified celastrol as a compound that covalently bound to and dissociated the COMMD3/8 complex. Celastrol inhibited B cell migration, reduced antibody responses, and blocked arthritis progression, recapitulating deficiency of the COMMD3/8 complex. These effects of celastrol were abolished in mice expressing a celastrol-resistant mutant of the COMMD3/8 complex. These findings establish that celastrol exerts immunosuppressive activity by targeting the COMMD3/8 complex. Our study suggests that the COMMD3/8 complex is a potentially druggable target in autoimmune diseases and points to celastrol as a lead pharmacologic candidate in this capacity.
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Affiliation(s)
- Taiichiro Shirai
- Laboratory of Immune Response Dynamics, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Akiko Nakai
- Laboratory of Immune Response Dynamics, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Department of Immune Response Dynamics, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Emiko Ando
- Laboratory of Immune Response Dynamics, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Jun Fujimoto
- Laboratory of Immune Response Dynamics, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Sarah Leach
- Laboratory of Immune Response Dynamics, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Takao Arimori
- Laboratory for Protein Synthesis and Expression, Institute for Protein Research, Osaka University, Suita, Osaka, Japan
| | - Daisuke Higo
- Thermo Fisher Scientific K.K., Yokohama, Kanagawa, Japan
| | - Floris J. van Eerden
- Laboratory of Systems Immunology, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Department of Genome Informatics, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Janyerkye Tulyeu
- Laboratory of Human Single Cell Immunology, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Center for Infectious Disease Education and Research, Osaka University, Suita, Osaka, Japan
| | - Yu-Chen Liu
- Laboratory of Human Immunology (Single Cell Genomics), WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Daisuke Okuzaki
- Center for Infectious Disease Education and Research, Osaka University, Suita, Osaka, Japan
- Laboratory of Human Immunology (Single Cell Genomics), WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Masanori A. Murayama
- Department of Animal Models for Human Diseases, Institute of Biomedical Science, Kansai Medical University, Hirakata, Osaka, Japan
| | - Haruhiko Miyata
- Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Kazuto Nunomura
- Center for Supporting Drug Discovery and Life Science Research, Graduate School of Pharmaceutical Science, Osaka University, Suita, Osaka, Japan
| | - Bangzhong Lin
- Center for Supporting Drug Discovery and Life Science Research, Graduate School of Pharmaceutical Science, Osaka University, Suita, Osaka, Japan
| | - Akiyoshi Tani
- Center for Supporting Drug Discovery and Life Science Research, Graduate School of Pharmaceutical Science, Osaka University, Suita, Osaka, Japan
| | - Atsushi Kumanogoh
- Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Center for Infectious Disease Education and Research, Osaka University, Suita, Osaka, Japan
- Laboratory of Immunopathology, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Osaka, Japan
| | - Masahito Ikawa
- Center for Infectious Disease Education and Research, Osaka University, Suita, Osaka, Japan
- Department of Experimental Genome Research, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - James B. Wing
- Laboratory of Human Single Cell Immunology, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Center for Infectious Disease Education and Research, Osaka University, Suita, Osaka, Japan
| | - Daron M. Standley
- Laboratory of Systems Immunology, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Department of Genome Informatics, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
- Center for Infectious Disease Education and Research, Osaka University, Suita, Osaka, Japan
| | - Junichi Takagi
- Laboratory for Protein Synthesis and Expression, Institute for Protein Research, Osaka University, Suita, Osaka, Japan
- Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Osaka, Japan
| | - Kazuhiro Suzuki
- Laboratory of Immune Response Dynamics, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
- Department of Immune Response Dynamics, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
- Center for Infectious Disease Education and Research, Osaka University, Suita, Osaka, Japan
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3
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Spetz M, Lundberg L, Nwaru C, Li H, Santosa A, Ng N, Leach S, Gisslén M, Hammar N, Nyberg F, Rosvall M. An intersectional analysis of sociodemographic disparities in Covid-19 vaccination: A nationwide register-based study in Sweden. Vaccine 2022; 40:6640-6648. [PMID: 36210254 PMCID: PMC9515344 DOI: 10.1016/j.vaccine.2022.09.065] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [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: 06/09/2022] [Revised: 09/19/2022] [Accepted: 09/21/2022] [Indexed: 01/27/2023]
Abstract
BACKGROUND Studies on sociodemographic disparities in Covid-19 vaccination uptake in the general population are still limited and mostly focused on older adults. This study examined sociodemographic differences in Covid-19 vaccination uptake in the total Swedish population aged 18-64 years. METHODS National Swedish register data within the SCIFI-PEARL project were used to cross-sectionally investigate sociodemographic differences in Covid-19 vaccination among Swedish adults aged 18-64 years (n = 5,987,189) by 12 October 2021. Using logistic regression models, analyses were adjusted for sociodemographic factors, region of residence, history of Covid-19, and comorbidities. An intersectional analysis approach including several cross-classified subgroups was used to further address the complexity of sociodemographic disparities in vaccination uptake. FINDINGS By 12 October 2021, 76·0% of the Swedish population 18-64 years old had received at least two doses of Covid-19 vaccine, an additional 5·5% had received only one dose, and 18·5% were non-vaccinated. Non-vaccinated individuals were, compared to vaccinated, more often younger, male, had a lower income, were not gainfully employed, and/or were born outside Sweden. The social patterning for vaccine dose two was similar, but weaker, than for dose one. After multivariable adjustments, findings remained but were attenuated indicating the need to consider different sociodemographic factors simultaneously. The intersectional analysis showed a large variation in vaccine uptake ranging from 32% to 96% in cross-classified subgroups, reflecting considerable sociodemographic heterogeneity in vaccination coverage. INTERPRETATION Our study, addressing the entire Swedish population aged 18-64 years, showed broad sociodemographic disparities in Covid-19 vaccine uptake but also wide heterogeneities in coverage. The intersectional analysis approach indicates that focusing on specific sociodemographic factors in isolation and group average risks without considering the heterogeneity within such groups will risk missing the full variability of vaccine coverage. FUNDING SciLifeLab / Knut & Alice Wallenberg Foundation, Swedish Research Council, Swedish government ALF agreement, FORMAS.
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Affiliation(s)
- M. Spetz
- School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Sweden,Department of Clinical Microbiology, Sahlgrenska University Hospital, Region Västra Gotaland, Gothenburg, Sweden,Corresponding author at: School of Public health and Community Medicine, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Box 463, 405 30 Gothenburg, Sweden
| | - L. Lundberg
- Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden,Department of Clinical Pharmacology, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
| | - C. Nwaru
- School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Sweden
| | - H. Li
- School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Sweden
| | - A. Santosa
- School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Sweden
| | - N. Ng
- School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Sweden
| | - S. Leach
- Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden,Department of Clinical Pharmacology, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
| | - M. Gisslén
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden,Department of Infectious Diseases, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
| | - N. Hammar
- Unit of Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - F. Nyberg
- School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Sweden
| | - M. Rosvall
- School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Sweden,Department of Social Medicine, Regionhälsan, Region Västra Götaland, Gothenburg, Sweden
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4
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Gilardi J, Leach J, Leach S, Hurlbut J, Horner S, Chamberlain J, Jenkins J, Pulvino M, Dewhurst S, Kielkopf C. HIV-1 Rev regulates host transcription and RNA processing factor Tat-SF1 to promote HIV-1 infectivity. Acta Crystallogr A Found Adv 2022. [DOI: 10.1107/s205327332209965x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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5
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Bhatia K, Columb M, Shelton C, Lie J, Leach S, Froud O, Verma D, Sturgess P, Sawyerr A, Desai J, Gould N, Kumari S, Sen U, Verma P, Kamath P, Koirala A, Kimber‐Craig S, Eccles J, Bewlay A, Eslam E, Radwan M, Hulgur M, Christian J, Aiyad A. Epidural labour analgesia rates during the
COVID
‐19 pandemic in the north‐west of England. Anaesthesia 2022; 77:1055-1056. [DOI: 10.1111/anae.15780] [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] [Accepted: 05/08/2022] [Indexed: 11/28/2022]
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6
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Sui SX, Williams LJ, Holloway-Kew KL, Hyde NK, Leach S, Pasco JA. Associations Between Muscle Quality and Cognitive Function in Older Men: Cross-Sectional Data From the Geelong Osteoporosis Study. J Clin Densitom 2022; 25:133-140. [PMID: 33879389 DOI: 10.1016/j.jocd.2021.03.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 03/15/2021] [Accepted: 03/15/2021] [Indexed: 01/02/2023]
Abstract
Sarcopenia-related declines appear to be adversely associated with cognition in the elderly. Poor muscle quality is a marker for sarcopenia, yet little research has examined the concurrence of poor muscle quality and poor cognition. The aim of this study was to investigate the association between muscle quality and cognitive function, overall and in specific domains, in older men. This study involved 342 men from the Geelong Osteoporosis Study (ages 60-96 years). Handgrip strength (HGS, kg) was measured by dynamometry (Vernier, LoggerPro3), and lean mass of arms (kg) and appendicular lean mass (ALM, kg) by dual-energy X-ray absorptiometry (Lunar). Muscle quality was expressed as HGS/(arm lean mass) (kg/kg) as well as HGS/ALM (kg/kg). Cognitive function was assessed in 4 domains: visual attention, psychomotor function, working memory and visual learning. Overall cognitive function scores were calculated. Higher scores represent poorer cognitive performance in attention, psychomotor function and working memory, but better performance for visual memory/learning and overall cognitive function. Additionally, cognitive impairment was determined by the mini-mental state exam (score ≤ 24). Linear regression analyses and logistic regression were performed. There were age-related declines observed for all measures relating to muscle and cognition. Muscle quality (HGS/arm lean mass) was associated with all cognition assessments before and after adjusting for age, except for age-adjusted working memory. Muscle quality (HGS/arm lean mass) was associated with psychomotor function (B -0.01, 95% CI -0.02, -0.005) and overall cognitive function (b + 0.07, 95% CI 0.03, 0.11) after adjusting for age and education. Greater muscle quality was also associated with the likelihood of cognitive impairment OR 0.64 (95%CI 0.46-0.88) after adjusting for age; associations with attention and visual memory/learning were attenuated after further adjustment for confounders. Similar patterns were observed when muscle quality was determined as HGS/ALM. Our data support an association between muscle quality and cognitive function. Further research is needed to examine temporal changes between the Two.
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Affiliation(s)
- Sophia X Sui
- Deakin University, IMPACT (Institute for Mental and Physical Health and Clinical Translation), Geelong, Victoria, Australia; University Hospital Geelong, Barwon Health, Geelong, Victoria, Australia.
| | - Lana J Williams
- Deakin University, IMPACT (Institute for Mental and Physical Health and Clinical Translation), Geelong, Victoria, Australia; University Hospital Geelong, Barwon Health, Geelong, Victoria, Australia
| | - Kara L Holloway-Kew
- Deakin University, IMPACT (Institute for Mental and Physical Health and Clinical Translation), Geelong, Victoria, Australia; University Hospital Geelong, Barwon Health, Geelong, Victoria, Australia
| | - Natalie K Hyde
- Deakin University, IMPACT (Institute for Mental and Physical Health and Clinical Translation), Geelong, Victoria, Australia; University Hospital Geelong, Barwon Health, Geelong, Victoria, Australia
| | - Sarah Leach
- University Hospital Geelong, Barwon Health, Geelong, Victoria, Australia; GMHBA, Geelong, Victoria, Australia
| | - Julie A Pasco
- Deakin University, IMPACT (Institute for Mental and Physical Health and Clinical Translation), Geelong, Victoria, Australia; University Hospital Geelong, Barwon Health, Geelong, Victoria, Australia; GMHBA, Geelong, Victoria, Australia; Department of Medicine-Western Health, The University of Melbourne, St Albans, Victoria, Australia; Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
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7
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Young LM, Moylan S, John T, Turner M, Opie R, Hockey M, Saunders D, Bruscella C, Jacka F, Teychenne M, Rosenbaum S, Banker K, Mahoney S, Tembo M, Lai J, Mundell N, McKeon G, Yucel M, Speight J, Absetz P, Versace V, Chatterton ML, Berk M, Manger S, Mohebbi M, Morgan M, Chapman A, Bennett C, O’Shea M, Rocks T, Leach S, O’Neil A. Evaluating telehealth lifestyle therapy versus telehealth psychotherapy for reducing depression in adults with COVID-19 related distress: the curbing anxiety and depression using lifestyle medicine (CALM) randomised non-inferiority trial protocol. BMC Psychiatry 2022; 22:219. [PMID: 35346115 PMCID: PMC8958477 DOI: 10.1186/s12888-022-03840-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 02/23/2022] [Accepted: 03/09/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND There is increasing recognition of the substantial burden of mental health disorders at an individual and population level, including consequent demand on mental health services. Lifestyle-based mental healthcare offers an additional approach to existing services with potential to help alleviate system burden. Despite the latest Royal Australian New Zealand College of Psychiatrists guidelines recommending that lifestyle is a 'first-line', 'non-negotiable' treatment for mood disorders, few such programs exist within clinical practice. Additionally, there are limited data to determine whether lifestyle approaches are equivalent to established treatments. Using an individually randomised group treatment design, we aim to address this gap by evaluating an integrated lifestyle program (CALM) compared to an established therapy (psychotherapy), both delivered via telehealth. It is hypothesised that the CALM program will not be inferior to psychotherapy with respect to depressive symptoms at 8 weeks. METHODS The study is being conducted in partnership with Barwon Health's Mental Health, Drugs & Alcohol Service (Geelong, Victoria), from which 184 participants from its service and surrounding regions are being recruited. Eligible participants with elevated psychological distress are being randomised to CALM or psychotherapy. Each takes a trans-diagnostic approach, and comprises four weekly (weeks 1-4) and two fortnightly (weeks 6 and 8) 90-min, group-based sessions delivered via Zoom (digital video conferencing platform). CALM focuses on enhancing knowledge, behavioural skills and support for improving dietary and physical activity behaviours, delivered by an Accredited Exercise Physiologist and Accredited Practising Dietitian. Psychotherapy uses cognitive behavioural therapy (CBT) delivered by a Psychologist or Clinical Psychologist, and Provisional Psychologist. Data collection occurs at baseline and 8 weeks. The primary outcome is depressive symptoms (assessed via the Patient Health Questionnaire-9) at 8 weeks. Societal and healthcare costs will be estimated to determine the cost-effectiveness of the CALM program. A process evaluation will determine its reach, adoption, implementation and maintenance. DISCUSSION If the CALM program is non-inferior to psychotherapy, this study will provide the first evidence to support lifestyle-based mental healthcare as an additional care model to support individuals experiencing psychological distress. TRIAL REGISTRATION Australia and New Zealand Clinical Trials Register (ANZCTR): ACTRN12621000387820 , Registered 8 April 2021.
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Affiliation(s)
- Lauren M. Young
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | - Steve Moylan
- grid.1021.20000 0001 0526 7079Deakin University, Geelong, Australia ,grid.414257.10000 0004 0540 0062Barwon Health, Geelong, Australia
| | - Tayla John
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia ,grid.414257.10000 0004 0540 0062Barwon Health, Geelong, Australia
| | - Megan Turner
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | - Rachelle Opie
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | - Meghan Hockey
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | - Dean Saunders
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | - Courtney Bruscella
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | - Felice Jacka
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | - Megan Teychenne
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | - Simon Rosenbaum
- grid.1005.40000 0004 4902 0432University of New South Wales, Sydney, Australia
| | - Khyati Banker
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | - Sophie Mahoney
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | - Monica Tembo
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | - Jerry Lai
- grid.1021.20000 0001 0526 7079Deakin University, Geelong, Australia ,grid.474047.4Intersect Australia, Sydney, Australia
| | - Niamh Mundell
- grid.1021.20000 0001 0526 7079Deakin University, Geelong, Australia
| | - Grace McKeon
- grid.1005.40000 0004 4902 0432University of New South Wales, Sydney, Australia
| | - Murat Yucel
- grid.1002.30000 0004 1936 7857Monash University, Melbourne, Australia
| | - Jane Speight
- grid.1021.20000 0001 0526 7079Deakin University, Geelong, Australia ,Diabetes Victoria, Melbourne, Australia
| | - Pilvikki Absetz
- grid.502801.e0000 0001 2314 6254Tampere University, Tampere, Finland
| | - Vincent Versace
- grid.1021.20000 0001 0526 7079Deakin University, Geelong, Australia
| | | | - Michael Berk
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia ,grid.414257.10000 0004 0540 0062Barwon Health, Geelong, Australia
| | - Sam Manger
- grid.1011.10000 0004 0474 1797James Cook University, Townsville, Australia
| | | | - Mark Morgan
- grid.1033.10000 0004 0405 3820Bond University, Gold Coast, Australia
| | - Anna Chapman
- grid.1021.20000 0001 0526 7079Deakin University, Geelong, Australia
| | | | - Melissa O’Shea
- grid.1021.20000 0001 0526 7079Deakin University, Geelong, Australia
| | - Tetyana Rocks
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
| | | | - Adrienne O’Neil
- grid.414257.10000 0004 0540 0062Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, Food & Mood Centre, School of Medicine, Barwon Health, Geelong, Australia
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8
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Saavedra M, Vestal B, Leach S, Poch K, Caceres S, Malcolm K, Laborda C, Leti F, Danhorn T, Walton K, Rysavy N, Reinhardt R. 402: Single-cell expression analysis of circulating adaptive immune cells after highly effective modulator therapy. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01826-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Affiliation(s)
- M Baber
- Health Action Campaign, Dalton House, 60 Windsor Avenue, London SW19 2RR, UK
| | - S Leach
- Health Action Campaign, London, UK
| | - N Musuwo
- Health Action Campaign, London, UK
| | - H Pham
- Health Action Campaign, London, UK
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10
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Nakai A, Leach S, Suzuki K. Control of immune cell trafficking through inter-organ communication. Int Immunol 2021; 33:327-335. [PMID: 33751050 DOI: 10.1093/intimm/dxab009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 12/10/2020] [Accepted: 03/03/2021] [Indexed: 12/24/2022] Open
Abstract
Cell migration is a cardinal feature of the immune system. Immune cell trafficking is orchestrated principally by chemokines and adhesion molecules, which guide the cells to the right place and at the right time to efficiently induce immune responses. Recent studies have demonstrated that signals from other organ systems influence the expression of and responsiveness to these guidance cues and consequentially immune cell migration. Neuronal inputs control entry and exit of immune cells to and from lymphoid and non-lymphoid tissues. The circadian clock helps establish diurnal variations in immune cell distribution among tissues. Nutritional status also alters immune cell homing to the bone marrow. In this review, we summarize the current knowledge about inter-organ control of immune cell trafficking and discuss the physiological and pathological significance of these mechanisms.
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Affiliation(s)
- Akiko Nakai
- Laboratory of Immune Response Dynamics, WPI Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan.,Department of Immune Response Dynamics, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan
| | - Sarah Leach
- Laboratory of Immune Response Dynamics, WPI Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan
| | - Kazuhiro Suzuki
- Laboratory of Immune Response Dynamics, WPI Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan.,Department of Immune Response Dynamics, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan
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11
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Sui SX, Williams LJ, Holloway-Kew KL, Hyde NK, Anderson KB, Tembo MC, Addinsall AB, Leach S, Pasco JA. Skeletal Muscle Density and Cognitive Function: A Cross-Sectional Study in Men. Calcif Tissue Int 2021; 108:165-175. [PMID: 32984908 DOI: 10.1007/s00223-020-00759-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 09/15/2020] [Indexed: 01/08/2023]
Abstract
We aimed to investigate cross-sectional associations between skeletal muscle density, a proxy measure for fatty infiltration into muscle, and cognition. Contributions from body fat mass, systemic inflammation and lifestyle were explored, as these factors have been identified in both muscle and cognitive deterioration. For 281 men (60-95 year) from the Geelong Osteoporosis Study, radial and tibial muscle density were measured using peripheral quantitative computed tomography. Body fat and appendicular lean mass were measured using dual-energy X-ray absorptiometry. Cognitive function was assessed for psychomotor function (DET), visual identification/attention (IDN), visual learning (OCL) and working memory (OBK) (CogState Brief Battery). Composite scores signified overall cognitive function (OCF). Higher scores represent poorer performance except for OCL and OCF. Regression analyses examined associations between muscle density and cognition; potential confounders included age, muscle cross-sectional area (CSA), body composition, lifestyle and serum markers of inflammation. Negative associations with age were evident for muscle density, all cognitive domains and OCF. Muscle density at both sites was positively associated with DET, OCL and OCF. After adjustment for age, the association persisted for DET (radius: B = - 0.006, p = 0.02; tibia: B = - 0.003, p = 0.04) and OCL (radius B = + 0.004, p = 0.02; tibia: B = + 0.005, p < 0.001). At the radius, further adjustment for serum TNF-α explained the association between muscle density (B = - 0.002, p = 0.66) and DET. Education and physical activity contributed to the model for radial muscle density and DET. There were no contributions from muscle CSA, appendicular lean mass, body fat mass, other markers of inflammation or other potential confounders. At the tibia, the association between muscle density and DET (B = - 0.003, p = 0.04) was independent of TNF-α. There was an age-adjusted association between muscle density and OCL at both sites (radius: B = + 0.004, p = 0.02; tibia: B = + 0.005, p < 0.001). None of the potential confounders contributed to the models. Muscle density was associated with cognitive function in the DET and OCL domains. However, there was little evidence that this was explained by inflammation or body fat mass. No associations were identified between muscle density and IDN or OBK.
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Affiliation(s)
- Sophia X Sui
- Deakin University, IMPACT Institute, Geelong, VIC, Australia.
- Epi-Centre for Healthy Ageing, School of Medicine, IMPACT Institute, Deakin University, Barwon Health, PO Box 281, Geelong, VIC, 3220, Australia.
| | - Lana J Williams
- Deakin University, IMPACT Institute, Geelong, VIC, Australia
| | | | - Natalie K Hyde
- Deakin University, IMPACT Institute, Geelong, VIC, Australia
| | - Kara B Anderson
- Deakin University, IMPACT Institute, Geelong, VIC, Australia
| | - Monica C Tembo
- Deakin University, IMPACT Institute, Geelong, VIC, Australia
| | | | | | - Julie A Pasco
- Deakin University, IMPACT Institute, Geelong, VIC, Australia
- Department of Medicine-Western Health, The University of Melbourne, St Albans, VIC, Australia
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC, Australia
- University Hospital Geelong, Barwon Health, Geelong, VIC, Australia
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12
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Sui SX, Holloway‐Kew KL, Hyde NK, Williams LJ, Tembo MC, Leach S, Pasco JA. Definition‐specific prevalence estimates for sarcopenia in an Australian population: the Geelong Osteoporosis Study. JCSM Clinical Reports 2020. [DOI: 10.1002/crt2.22] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
| | | | | | | | | | | | - Julie A. Pasco
- Deakin University Geelong Victoria Australia
- Department of Medicine—Western Campus The University of Melbourne St Albans Victoria Australia
- Department of Epidemiology and Preventive Medicine Monash University Melbourne Victoria Australia
- University Hospital Geelong Geelong Victoria Australia
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13
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Abstract
Circadian rhythms govern a multitude of physiologic processes, both on a cell-intrinsic level and systemically, through the coordinated function of multi-organ biosystems. One such system-the adrenergic system-relies on the catecholamine neurotransmitters, adrenaline and noradrenaline, to carry out a range of biological functions. Production of these catecholamines is under dual regulation by both neural components of the sympathetic nervous system and hormonal mechanisms involving the hypothalamus-pituitary-adrenal axis. Importantly, both neural and hormonal arms receive input from the body's central clock, giving rise to the observed rhythmic variations in catecholamine levels in blood and peripheral tissues. Oscillations in catecholamine signals have the potential to influence various cellular targets expressing adrenergic receptors, including cells of the immune system. This review will focus on ways in which the body's central master clock regulates the adrenergic system to generate circadian rhythms in adrenaline and noradrenaline, and will summarize the existing literature linking circadian control of the adrenergic system to immunologic outcomes. A better understanding of the complex, multi-system pathways involved in the control of adrenergic signals may provide immunologists with new insight into mechanisms of immune regulation and precipitate the discovery of new therapeutics.
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Affiliation(s)
| | - Kazuhiro Suzuki
- Laboratory of Immune Response Dynamics, Immunology Frontier Research Center, Osaka University, Osaka, Japan
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14
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Sui SX, Holloway-Kew KL, Hyde NK, Williams LJ, Tembo MC, Mohebbi M, Gojanovic M, Leach S, Pasco JA. Handgrip strength and muscle quality in Australian women: cross-sectional data from the Geelong Osteoporosis Study. J Cachexia Sarcopenia Muscle 2020; 11:690-697. [PMID: 32061063 PMCID: PMC7296267 DOI: 10.1002/jcsm.12544] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [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: 06/06/2019] [Revised: 12/05/2019] [Accepted: 01/07/2020] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Low handgrip strength (HGS) is a measure of poor skeletal muscle performance and a marker of ill health and frailty. Muscle quality (MQ) is a measure of muscle strength relative to muscle mass. We aimed to develop normative data for HGS and MQ, report age-related prevalence of low HGS and MQ, and determine the relationship with age, anthropometry, and body composition for women in Australia. METHODS This cross-sectional analysis included data from 792 women (ages 28-95 years) assessed by the Geelong Osteoporosis Study. Duplicate measures of HGS were performed for each hand with a dynamometer (Jamar) and the mean of maximum values used for analyses. Dual energy X-ray absorptiometry-derived lean mass for the arms was used to calculate MQ as HGS/lean mass (kg/kg). Body mass index (BMI) was categorized as normal (BMI < 25.0 kg/m2 ), overweight (25.0-29.9 kg/m2 ), and obese (>30.0 kg/m2 ). Fat mass index (FMI) was calculated as whole body fat/height2 (kg/m2 ) and appendicular lean mass index (ALMI) as lean mass of arms and legs/height2 (kg/m2 ). RESULTS Mean (±SD) of HGS values for normal BMI, overweight, and obese groups were 25 (±7), 24 (±7), and 24 (±7) kg, P = 0.09, and for MQ, 12 (±3), 11 (±3), and 10 (±3) kg/kg, P < 0.001. Our data indicated a quadratic relationship between age and HGS or MQ. Mean HGS and MQ remained stable until the fifth age decade then declined steadily with increasing age; therefore, we used data for women (n = 283) aged 28-49 years as the young adult reference group, with mean (SD) values for HGS 28 (±6) kg and MQ 12 (±3) kg/kg. The prevalence of low (T-score < -2) HGS and MQ for women 80 years and older was 52.2% and 39.6%, respectively. In multivariable models, age-adjusted HGS was associated with FMI (B = -0.13, P = 0.004) and ALMI (1.03, <0.001) while age-adjusted MQ was associated with BMI (-0.15, <0.001) but not with FMI. In a sensitivity analysis, the same pattern remained after the removal of 129 women who reported hand and/or arm pain. CONCLUSIONS Mean HGS and MQ declined with advancing age in older women. Our data suggest that while mean HGS increased with appendicular lean mass and decreased with body fat mass, there was no association with BMI. By contrast, MQ decreased with increasing BMI, but not with increasing adiposity.
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Affiliation(s)
- Sophia X Sui
- School of Medicine, Deakin University, Geelong, VIC, Australia
| | | | - Natalie K Hyde
- School of Medicine, Deakin University, Geelong, VIC, Australia
| | - Lana J Williams
- School of Medicine, Deakin University, Geelong, VIC, Australia
| | - Monica C Tembo
- School of Medicine, Deakin University, Geelong, VIC, Australia
| | - Mohammadreza Mohebbi
- Biostatistics Unit, Faculty of Health, Deakin University, Geelong, VIC, Australia
| | | | | | - Julie A Pasco
- School of Medicine, Deakin University, Geelong, VIC, Australia.,Department of Medicine-Western Campus, The University of Melbourne, St Albans, VIC, Australia.,Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC, Australia.,Barwon Health, University Hospital Geelong, Geelong, VIC, Australia
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15
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Leach S, Shinnakasu R, Adachi Y, Momota M, Makino-Okamura C, Yamamoto T, Ishii KJ, Fukuyama H, Takahashi Y, Kurosaki T. Requirement for memory B-cell activation in protection from heterologous influenza virus reinfection. Int Immunol 2020; 31:771-779. [PMID: 31231764 DOI: 10.1093/intimm/dxz049] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 06/19/2019] [Indexed: 02/07/2023] Open
Abstract
While two memory compartments, memory B cells and long-lived plasma cells, are thought to contribute to the successful establishment of memory recall responses, the unique roles of each cellular compartment are still unclear. Herein, by tracing influenza anti-hemagglutinin (HA)-specific antibodies in mice, we demonstrate that pre-existing antibodies secreted by long-lived plasma cells are essential for protection from reinfection with the same influenza virus, whereas protection from secondary infection with an antigenically distinct influenza virus requires memory B-cell activation. These activated memory B cells were largely specific for the conserved HA stem region, and generated sufficient levels of antibodies for protection from heterologous reinfection. Given that the anti-stem plasmablasts derived from the memory B cells were higher affinity than those from naive B cells, our results suggest that maturation of anti-stem memory B cells during primary influenza infection and their subsequent activation are required for protection from reinfection by mutant viruses.
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Affiliation(s)
- Sarah Leach
- Graduate School of Frontier Biosciences, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan.,Laboratory of Lymphocyte Differentiation, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Ryo Shinnakasu
- Laboratory of Lymphocyte Differentiation, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Yu Adachi
- Department of Immunology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masatoshi Momota
- Laboratory of Adjuvant Innovation, National Institute of Biomedical Innovation, Osaka, Japan
| | - Chieko Makino-Okamura
- Laboratory of Lymphocyte Differentiation, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Kanagawa, Japan
| | - Takuya Yamamoto
- Laboratory of Immunosenescence, National Institute of Biomedical Innovation, Osaka, Japan
| | - Ken J Ishii
- Laboratory of Adjuvant Innovation, National Institute of Biomedical Innovation, Osaka, Japan
| | - Hidehiro Fukuyama
- Laboratory of Lymphocyte Differentiation, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Kanagawa, Japan
| | - Yoshimasa Takahashi
- Department of Immunology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Tomohiro Kurosaki
- Graduate School of Frontier Biosciences, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan.,Laboratory of Lymphocyte Differentiation, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan.,Laboratory of Lymphocyte Differentiation, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Kanagawa, Japan
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16
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Leach S. Starlight stretched by black hole. New Sci 2018. [DOI: 10.1016/s0262-4079(18)31378-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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18
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Dunbar C, McMahon AM, Leach S, Hawley DP. 35. Splinting in children with inflammatory joint disease and hypermobility: A survey of current practice in the United Kingdom. Rheumatology (Oxford) 2017. [DOI: 10.1093/rheumatology/kex390.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Ward OJ, Leach S, McMahon AM, Hawley DP. 39. United Kingdom survey of Physiotherapy group exercise classes in paediatric Rheumatology. Rheumatology (Oxford) 2017. [DOI: 10.1093/rheumatology/kex390.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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20
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21
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Dagneaux P, Depautex C, Dhez P, Durup J, Farge Y, Fourme R, Guyon PM, Jaeglé P, Leach S, Lopez-Delgado R, Morel G, Pinchaux R, Thiry P, Vermeil C, Wuilleumier F. L’utilisation du rayonnement synchrotron en France. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/anphys/197514090009] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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22
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Curinga G, Leach S, Singh S, Hubbard N, Hagin D, Sommer K, Khan I, Song Y, Torgerson T, Scharenberg A, Rawlings DJ. 316. Successful Editing of the CD40LG Locus in Human Hematopoietic Stem Cells. Mol Ther 2016. [DOI: 10.1016/s1525-0016(16)33125-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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23
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Jacobs HM, Thouvenel CD, Leach S, Arkatkar T, Metzler G, Scharping NE, Kolhatkar NS, Rawlings DJ, Jackson SW. Cutting Edge: BAFF Promotes Autoantibody Production via TACI-Dependent Activation of Transitional B Cells. J Immunol 2016; 196:3525-31. [PMID: 27022196 DOI: 10.4049/jimmunol.1600017] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 02/23/2016] [Indexed: 11/19/2022]
Abstract
Mice overexpressing B cell activating factor of the TNF family (BAFF) develop systemic autoimmunity characterized by class-switched anti-nuclear Abs. Transmembrane activator and CAML interactor (TACI) signals are critical for BAFF-mediated autoimmunity, but the B cell developmental subsets undergoing TACI-dependent activation in settings of excess BAFF remain unclear. We report that, although surface TACI expression is usually limited to mature B cells, excess BAFF promotes the expansion of TACI-expressing transitional B cells. TACI(+) transitional cells from BAFF-transgenic mice are characterized by an activated, cycling phenotype, and the TACI(+) cell subset is specifically enriched for autoreactivity, expresses activation-induced cytidine deaminase and T-bet, and exhibits evidence of somatic hypermutation. Consistent with a potential contribution to BAFF-mediated humoral autoimmunity, TACI(+) transitional B cells from BAFF-transgenic mice spontaneously produce class-switched autoantibodies ex vivo. These combined findings highlight a novel mechanism through which BAFF promotes humoral autoimmunity via direct, TACI-dependent activation of transitional B cells.
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Affiliation(s)
- Holly M Jacobs
- Seattle Children's Research Institute, Seattle, WA 98101
| | | | - Sarah Leach
- Seattle Children's Research Institute, Seattle, WA 98101
| | - Tanvi Arkatkar
- Seattle Children's Research Institute, Seattle, WA 98101
| | - Genita Metzler
- Seattle Children's Research Institute, Seattle, WA 98101; Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109; and
| | | | - Nikita S Kolhatkar
- Seattle Children's Research Institute, Seattle, WA 98101; Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109; and
| | - David J Rawlings
- Seattle Children's Research Institute, Seattle, WA 98101; Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109; and Department of Pediatrics, University of Washington School of Medicine, Seattle, WA 98195
| | - Shaun W Jackson
- Seattle Children's Research Institute, Seattle, WA 98101; Department of Pediatrics, University of Washington School of Medicine, Seattle, WA 98195
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24
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Suzuki R, Leach S, Liu W, Ralston E, Scheffel J, Zhang W, Lowell CA, Rivera J. Molecular editing of cellular responses by the high-affinity receptor for IgE. Science 2014; 343:1021-5. [PMID: 24505132 DOI: 10.1126/science.1246976] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Cellular responses elicited by cell surface receptors differ according to stimulus strength. We investigated how the high-affinity receptor for immunoglobulin E (IgE) modulates the response of mast cells to a high- or low-affinity stimulus. Both high- and low-affinity stimuli elicited similar receptor phosphorylation; however, differences were observed in receptor cluster size, mobility, distribution, and the cells' effector responses. Low-affinity stimulation increased receptor association with the Src family kinase Fgr and shifted signals from the adapter LAT1 to the related adapter LAT2. LAT1-dependent calcium signals required for mast cell degranulation were dampened, but the role of LAT2 in chemokine production was enhanced, altering immune cell recruitment at the site of inflammation. These findings uncover how receptor discrimination of stimulus strength can be interpreted as distinct in vivo outcomes.
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Affiliation(s)
- Ryo Suzuki
- Laboratory of Molecular Immunogenetics, National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, MD 20892, USA
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25
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Sansom P, Copley VR, Naik FC, Leach S, Hall IM. A case-association cluster detection and visualisation tool with an application to Legionnaires' disease. Stat Med 2013; 32:3522-38. [PMID: 23483594 PMCID: PMC3842591 DOI: 10.1002/sim.5765] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 12/23/2011] [Revised: 11/09/2012] [Accepted: 01/28/2013] [Indexed: 11/08/2022]
Abstract
Statistical methods used in spatio-temporal surveillance of disease are able to identify abnormal clusters of cases but typically do not provide a measure of the degree of association between one case and another. Such a measure would facilitate the assignment of cases to common groups and be useful in outbreak investigations of diseases that potentially share the same source. This paper presents a model-based approach, which on the basis of available location data, provides a measure of the strength of association between cases in space and time and which is used to designate and visualise the most likely groupings of cases. The method was developed as a prospective surveillance tool to signal potential outbreaks, but it may also be used to explore groupings of cases in outbreak investigations. We demonstrate the method by using a historical case series of Legionnaires' disease amongst residents of England and Wales.
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Affiliation(s)
- P Sansom
- Microbial Risk Assessment, Emergency Response Department, Health Protection Agency, Porton Down, Salisbury, Wiltshire, SP4 0JG, U.K
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26
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Lundgren A, Leach S, Tobias J, Carlin N, Gustafsson B, Jertborn M, Bourgeois L, Walker R, Holmgren J, Svennerholm AM. Clinical trial to evaluate safety and immunogenicity of an oral inactivated enterotoxigenic Escherichia coli prototype vaccine containing CFA/I overexpressing bacteria and recombinantly produced LTB/CTB hybrid protein. Vaccine 2013; 31:1163-70. [DOI: 10.1016/j.vaccine.2012.12.063] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 12/18/2012] [Accepted: 12/26/2012] [Indexed: 11/30/2022]
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27
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Bull M, Hall IM, Leach S, Robesyn E. The application of geographic information systems and spatial data during Legionnaires’ disease outbreak responses. Euro Surveill 2012; 17. [DOI: 10.2807/ese.17.49.20331-en] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Binary file ES_Abstracts_Final_ECDC.txt matches
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Affiliation(s)
- M Bull
- Microbial Risk Assessment, Emergency Response Department, Health Protection Agency, Porton Down, United Kingdom
| | - I M Hall
- Microbial Risk Assessment, Emergency Response Department, Health Protection Agency, Porton Down, United Kingdom
| | - S Leach
- Microbial Risk Assessment, Emergency Response Department, Health Protection Agency, Porton Down, United Kingdom
| | - E Robesyn
- Surveillance and Response Support Unit, European Centre for Disease Prevention and Control, Stockholm, Sweden
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28
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Ooi C, Lee J, Leach S, Katz T, Day A, Jaffe A. 226 Intestinal inflammation in CF: stool markers and correlation with pancreatic enzymes. J Cyst Fibros 2012. [DOI: 10.1016/s1569-1993(12)60395-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Hugonnet S, Hall I, Barrass I, Leach S, Pittet D. Transmission dynamic of methicillin-resistant Staphylococcus aureus in a medical intensive care unit. BMC Proc 2011. [PMCID: PMC3239489 DOI: 10.1186/1753-6561-5-s6-o73] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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30
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Karatzas K, Hocking P, Jørgensen F, Mattick K, Leach S, Humphrey T. Effects of repeated cycles of acid challenge and growth on the phenotype and virulence ofSalmonella enterica. J Appl Microbiol 2008; 105:1640-8. [DOI: 10.1111/j.1365-2672.2008.03909.x] [Citation(s) in RCA: 16] [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] [Indexed: 11/30/2022]
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31
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Medlock JM, Pietzsch ME, Rice NVP, Jones L, Kerrod E, Avenell D, Los S, Ratcliffe N, Leach S, Butt T. Investigation of ecological and environmental determinants for the presence of questing Ixodes ricinus (Acari: Ixodidae) on Gower, South Wales. J Med Entomol 2008; 45:314-325. [PMID: 18402148 DOI: 10.1603/0022-2585(2008)45[314:ioeaed]2.0.co;2] [Citation(s) in RCA: 17] [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] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The spatial heterogeneity of questing Ixodes ricinus (L.) (Acari: Ixodidae) within endemic areas in Great Britain is well established. Their presence is acutely responsive to blood host availability and their ability to maintain water balance, which are in turn governed by a variety of ecological and environmental factors. This article details the findings of a 3-yr study on the Gower peninsula, south Wales, which investigated the contribution of such factors (both ground- and geographic information systems [GIS] -derived) for predicting the presence of questing I. ricinus (Q(P)), at a local scale. Statistically significant univariate associations were found between Q(P) and calcareous/ neutral grassland and heathland habitats, particularly those grazed by livestock, and various factors that intuitively promote tick survival. For example, topographical features, such as certain aspects, that reduce exposure to cold northerly winds and the hot midday sun, favored Q(P). Similarly, positive associations were found with substrata composed of less permeable soil types and less permeable superficial/bedrock geologies that promote a moist microhabitat and reduce the likelihood of desiccation. Q(P) was also higher in areas of high soil moisture. This study highlighted a number of GIS-derived data sets that could be applied in the development of local and national predictive maps for I. ricinus in Great Britain. An understanding of the influence of these factors on questing I. ricinus can aid targeted tick control programs and help to educate the public, and those occupationally exposed, in understanding likely I. ricinus prolific areas within an I. ricinus endemic region.
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Affiliation(s)
- J M Medlock
- Health Protection Agency, Centre for Emergency Preparedness & Response, Porton Down, Salisbury, Wiltshire SP4 0JG, United Kingdom.
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Medlock JM, Barrass I, Kerrod E, Taylor MA, Leach S. Analysis of Climatic Predictions for Extrinsic Incubation of Dirofilaria in The United Kingdom. Vector Borne Zoonotic Dis 2007; 7:4-14. [PMID: 17417953 DOI: 10.1089/vbz.2006.0564] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [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: 11/12/2022] Open
Abstract
Transmission of dirofilariasis in Europe is dependent upon the presence of sufficient numbers of infected dogs, susceptible mosquitoes, and a suitable climate to permit extrinsic incubation of Dirofilaria in the mosquito intermediate host. Dogs returning to the United Kingdom from overseas have been infected with several vector-borne infections (Babesia, Ehrlichia, Leishmania, and Dirofilaria), and this paper assesses the climatic constraints on the potential rate of extrinsic incubation of Dirofilaria in the United Kingdom. A model using an established algorithm based on accumulated temperature predicts that summer temperatures during 1995-2000 may have been sufficient to permit complete incubation of Dirofilaria in 2 of the years for large parts of southern/central England, and 5 years around London. The occurrence of autochthonous transmission would be dependent upon additional factors related to frequency of returning infected dogs and the distribution and abundance of putative mosquito vectors, and these should be studied further.
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Affiliation(s)
- J M Medlock
- Health Protection Agency, Centre for Emergency Preparedness & Response, Salisbury, Wiltshire, United Kingdom.
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Kumar RA, Leach S, Bonaguro R, Chen J, Yokom DW, Abrahams BS, Seaver L, Schwartz CE, Dobyns W, Brooks-Wilson A, Simpson EM. Mutation and evolutionary analyses identify NR2E1-candidate-regulatory mutations in humans with severe cortical malformations. Genes Brain Behav 2006; 6:503-16. [PMID: 17054721 PMCID: PMC2040186 DOI: 10.1111/j.1601-183x.2006.00277.x] [Citation(s) in RCA: 10] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nuclear receptor 2E1 (NR2E1) is expressed in human fetal and adult brains; however, its role in human brain–behavior development is unknown. Previously, we have corrected the cortical hypoplasia and behavioral abnormalities in Nr2e1−/− mice using a genomic clone spanning human NR2E1, which bolsters the hypothesis that NR2E1 may similarly play a role in human cortical and behavioral development. To test the hypothesis that humans with abnormal brain–behavior development may have null or hypomorphic NR2E1 mutations, we undertook the first candidate mutation screen of NR2E1 by sequencing its entire coding region, untranslated, splice site, proximal promoter and evolutionarily conserved non-coding regions in 56 unrelated patients with cortical disorders, namely microcephaly. We then genotyped the candidate mutations in 325 unrelated control subjects and 15 relatives. We did not detect any coding region changes in NR2E1; however, we identified seven novel candidate regulatory mutations that were absent from control subjects. We used in silico tools to predict the effects of these candidate mutations on neural transcription factor binding sites (TFBS). Four candidate mutations were predicted to alter TFBS. To facilitate the present and future studies of NR2E1, we also elucidated its molecular evolution, genetic diversity, haplotype structure and linkage disequilibrium by sequencing an additional 94 unaffected humans representing Africa, the Americas, Asia, Europe, the Middle East and Oceania, as well as great apes and monkeys. We detected strong purifying selection, low genetic diversity, 21 novel polymorphisms and five common haplotypes at NR2E1. We conclude that protein-coding changes in NR2E1 do not contribute to cortical and behavioral abnormalities in the patients examined here, but that regulatory mutations may play a role.
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Affiliation(s)
- R A Kumar
- Centre for Molecular Medicine and Therapeutics and Child & Family Research InstituteVancouver, Canada
- Department of Medical Genetics, University of British ColumbiaVancouver, Canada
| | - S Leach
- Canada’s Michael Smith Genome Sciences Centre, British Columbia Cancer AgencyVancouver, Canada
| | - R Bonaguro
- Centre for Molecular Medicine and Therapeutics and Child & Family Research InstituteVancouver, Canada
| | - J Chen
- Centre for Molecular Medicine and Therapeutics and Child & Family Research InstituteVancouver, Canada
| | - D W Yokom
- Centre for Molecular Medicine and Therapeutics and Child & Family Research InstituteVancouver, Canada
| | - B S Abrahams
- Centre for Molecular Medicine and Therapeutics and Child & Family Research InstituteVancouver, Canada
| | - L Seaver
- Center for Molecular Studies, J.C. Self Research Institute, Greenwood Genetic CenterGreenwood, SC, USA
| | - C E Schwartz
- Center for Molecular Studies, J.C. Self Research Institute, Greenwood Genetic CenterGreenwood, SC, USA
| | - W Dobyns
- University of ChicagoChicago, IL, USA
| | - A Brooks-Wilson
- Department of Medical Genetics, University of British ColumbiaVancouver, Canada
- Canada’s Michael Smith Genome Sciences Centre, British Columbia Cancer AgencyVancouver, Canada
| | - E M Simpson
- Centre for Molecular Medicine and Therapeutics and Child & Family Research InstituteVancouver, Canada
- Department of Medical Genetics, University of British ColumbiaVancouver, Canada
- Corresponding author: Elizabeth M. Simpson, 3020 980 West 28 Ave, Vancouver, BC, Canada V5Z 4H4. E-mail:
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Abstract
The ongoing worldwide spread of the H5N1 influenza virus in birds has increased concerns of a new human influenza pandemic and a number of surveillance initiatives are planned, or are in place, to monitor the impact of a pandemic in near real-time. Using epidemiological data collected during the early stages of an outbreak, we show how the timing of the maximum prevalence of the pandemic wave, along with its amplitude and duration, might be predicted by fitting a mass-action epidemic model to the surveillance data by standard regression analysis. This method is validated by applying the model to routine data collected in the United Kingdom during the different waves of the previous three pandemics. The success of the method in forecasting historical prevalence suggests that such outbreaks conform reasonably well to the theoretical model, a factor which may be exploited in a future pandemic to update ongoing planning and response.
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Affiliation(s)
- I M Hall
- Microbial Risk Assessment, Health Protection Agency, Centre for Emergency Preparedness and Response, Porton Down, Wiltshire, UK.
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Medlock JM, Snow KR, Leach S. Possible ecology and epidemiology of medically important mosquito-borne arboviruses in Great Britain. Epidemiol Infect 2006; 135:466-82. [PMID: 16893487 PMCID: PMC2870593 DOI: 10.1017/s0950268806007047] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2006] [Indexed: 11/07/2022] Open
Abstract
Nine different arboviruses are known to be transmitted by, or associated with, mosquitoes in Europe, and several (West Nile, Sindbis and Tahyna viruses) are reported to cause outbreaks of human disease. Although there have been no reported human cases in Great Britain (GB), there have been no published in-depth serological surveys for evidence of human infection. This paper investigates the ecological and entomological factors that could influence or restrict transmission of these viruses in GB, suggesting that in addition to West Nile virus, Sindbis and Tahyna viruses could exist in enzootic cycles, and that certain ecological factors could facilitate transmission to humans. However, the level of transmission is likely to be lower than in endemic foci elsewhere in Europe due to key ecological differences related to spatial and temporal dynamics of putative mosquito vectors and presence of key reservoir hosts. Knowledge of the potential GB-specific disease ecology can aid assessments of risk from mosquito-borne arboviruses.
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Affiliation(s)
- J M Medlock
- Health Protection Agency, Centre for Emergency Preparedness & Response, Porton Down, Salisbury, Wiltshire, UK.
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Pietzsch ME, Medlock JM, Jones L, Avenell D, Abbott J, Harding P, Leach S. Distribution of Ixodes ricinus in the British Isles: investigation of historical records. Med Vet Entomol 2005; 19:306-14. [PMID: 16134979 DOI: 10.1111/j.1365-2915.2005.00575.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Ixodes ricinus Linnaeus (Acari: Ixodidae) is the most abundant and widely distributed tick in the British Isles, and is a vector for a number of bacterial, viral and protozoal pathogens of both medical and veterinary importance. This report provides an update to the historical distribution data of I. ricinus, published by the Biological Records Centre (BRC), Monks Wood in The Provisional Atlas of the Ticks (Ixodidae) of the British Isles by K. P. Martyn (1988), and is supplemented with additional BRC records since 1988, additional data from published scientific literature and unpublished field studies, and enhanced with spatial and temporal information on tick stages collected and their host associations. Records have been mapped at 10 km resolution and enhanced to 5 km, 1 km and 0.1 km. Differentiation between records representing one-off collections from those representing populations of I. ricinus has been achieved through the classification of the records into either reported or established populations. Detailed seasonality and host associations of records are investigated, highlighting the value in obtaining additional detailed contemporary data to aid risk assessments and research within this field.
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Affiliation(s)
- M E Pietzsch
- Microbial Risk Assessment, Health Protection Agency, Centre for Emergency Preparedness & Response, Porton Down, Salisbury, Wiltshire SP4 0JG, U.K.
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Medlock JM, Snow KR, Leach S. Potential transmission of West Nile virus in the British Isles: an ecological review of candidate mosquito bridge vectors. Med Vet Entomol 2005; 19:2-21. [PMID: 15752172 DOI: 10.1111/j.0269-283x.2005.00547.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.8] [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
West Nile virus (WNV) transmitted by mosquitoes (Diptera: Culicidae) infects various vertebrates, being pathogenic for birds, horses and humans. After its discovery in tropical Africa, sporadic outbreaks of WNV occurred during recent decades in Eurasia, but not the British Isles. WNV reached New York in 1999 and spread to California by 2003, causing widespread outbreaks of West Nile encephalitis across North America, transmitted by many species of mosquitoes, mainly Culex spp. The periodic reappearance of WNV in parts of continental Europe (from southern France to Romania) gives rise to concern over the possibility of WNV invading the British Isles. The British Isles have about 30 endemic mosquito species, several with seasonal abundance and other eco-behavioural characteristics predisposing them to serve as potential WNV bridge vectors from birds to humans. These include: the predominantly ornithophilic Culex pipiens L. and its anthropophilic biotype molestus Forskal; tree-hole adapted Anopheles plumbeus Stephens; saltmarsh-adapted Ochlerotatus caspius Pallas, Oc. detritus Haliday and Oc. dorsalis (Meigen); Coquillettidia richiardii Ficalbi, Culiseta annulata Schrank and Cs. morsitans (Theobald) from vegetated freshwater pools; Aedes cinereus Meigen, Oc. cantans Meigen and Oc. punctor Kirby from seasonal woodland pools. Those underlined have been found carrying WNV in other countries (12 species), including the rarer British species Aedes vexans (Meigen), Culex europaeus Ramos et al., Cx. modestus Ficalbi and Oc. sticticus (Meigen) as well as the Anopheles maculipennis Meigen complex (mainly An. atroparvus van Thiel and An. messeae Falleroni in Britain). Those implicated as key vectors of WNV in Europe are printed bold (four species). So far there is no proof of any arbovirus transmission by mosquitoes in the British Isles, although antibodies to Sindbis, Tahyna, Usutu and West Nile viruses have been detected in British birds. Neighbouring European countries have enzootic WNV and human infections transmitted by mosquito species that are present in the British Isles. However, except for localized urban infestations of Cx. pipiens biotype molestus that can be readily eliminated, there appear to be few situations in the British Isles where humans and livestock are exposed to sustained risks of exposure to potential WNV vectors. Monitoring of mosquitoes and arbovirus surveillance are required to guard the British Isles against WNV outbreaks and introduction of more anthropophilic mosquitoes such as Stegomyia albopicta (Skuse) and Ochlerotatus japonicus (Theobald) that have recently invaded Europe, since they transmit arboviruses elsewhere.
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Affiliation(s)
- J M Medlock
- Microbial Risk Assessment, Health Protection Agency, Porton Down, Salisbury, Wiltshire, UK.
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Brooks-Wilson AR, Kaurah P, Suriano G, Leach S, Senz J, Grehan N, Butterfield YSN, Jeyes J, Schinas J, Bacani J, Kelsey M, Ferreira P, MacGillivray B, MacLeod P, Micek M, Ford J, Foulkes W, Australie K, Greenberg C, LaPointe M, Gilpin C, Nikkel S, Gilchrist D, Hughes R, Jackson CE, Monaghan KG, Oliveira MJ, Seruca R, Gallinger S, Caldas C, Huntsman D. Germline E-cadherin mutations in hereditary diffuse gastric cancer: assessment of 42 new families and review of genetic screening criteria. J Med Genet 2004; 41:508-17. [PMID: 15235021 PMCID: PMC1735838 DOI: 10.1136/jmg.2004.018275] [Citation(s) in RCA: 292] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Mutations in the E-cadherin (CDH1) gene are a well documented cause of hereditary diffuse gastric cancer (HDGC). Development of evidence based guidelines for CDH1 screening for HDGC have been complicated by its rarity, variable penetrance, and lack of founder mutations. METHODS Forty three new gastric cancer (GC) families were ascertained from multiple sources. In 42 of these families at least one gastric cancer was pathologically confirmed to be a diffuse gastric cancer (DGC); the other family had intestinal type gastric cancers. Screening of the entire coding region of the CDH1 gene and all intron/exon boundaries was performed by bi-directional sequencing. RESULTS Novel mutations were found in 13 of the 42 DGC families (31% overall). Twelve of these mutations occur among the 25 families with multiple cases of gastric cancer and with pathologic confirmation of diffuse gastric cancer phenotype in at least one individual under the age of 50 years. The mutations found include small insertions and deletions, splice site mutations, and three non-conservative amino acid substitutions (A298T, W409R, and R732Q). All three missense mutations conferred loss of E-cadherin function in in vitro assays. Multiple cases of breast cancers including pathologically confirmed lobular breast cancers were observed both in mutation positive and negative families. CONCLUSION Germline truncating CDH1 mutations are found in 48% of families with multiple cases of gastric cancer and at least one documented case of DGC in an individual under 50 years of age. We recommend that these criteria be used for selecting families for CDH1 mutational analysis.
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Affiliation(s)
- A R Brooks-Wilson
- Genome Sciences Centre, British Columbia Cancer Agency, 600 W. 10th Avenue, Vancouver, BC, Canada V5Z 4E6
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Abstract
INTRODUCTION We sought to compare the quality of e-poster and traditional poster communications. METHODS At the 2001 BAPEN congress, ten presenters were invited to supplement their poster by submitting its title and contents electronically. On projection, the submissions appeared as a poster. During chaired rounds, presenters 'talked to' the projection as if it were a traditional poster. They 'clicked' onto individual tables or figures to enlarge to full screen. A further 'click' returned the screen to poster format. Delegates attending two e-poster sessions, and a control group attending two simultaneous traditional poster rounds, responded to a questionnaire, on a scale 0--4, to statements which related: to the ability to (1) hear and (2) see well, (3) the posters'clarity and attractiveness, (4) whether the format of the session captured their interest and (5) encouraged discussion. Delegates also responded on how e-posters should be used in future meetings. Comparison was made using chi2 for trend. RESULTS Questionnaires were returned from attendees at e-poster (27) and traditional (25) poster rounds. For all questions, the trend was in favour of e-posters with significant differences seen for 'seeing' (P= 0.009), 'interest capture' (P< 0.007) and 'encouragement of discussion' (P<0.05). Thirty-two vs one delegates thought that e-posters should be used in future, 28 vs 4 delegates thought that e-posters and traditional posters should be used together, but most(23 vs 8) thought that traditional posters should not be completely replaced. CONCLUSIONS E-posters enable detailed search of a computer-based database of presentations, and viewing of the full content of all posters. Post-conference collaboration is enhanced by facilitating e-mail contact. E-posters should be used in tandem with traditional posters to improve the delivery of original communications.
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Affiliation(s)
- J Powell-Tuck
- Department of Adult and Paediatric Gastroenterology, The Royal London Hospital, UK
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Venturini J, Koudoumas E, Couris S, Janot JM, Seta P, Mathis C, Leach S. Optical limiting and nonlinear optical absorption properties of C60–polystyrene star polymer films: C60 concentration dependence. ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b201308h] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Leach S, Eland JHD, Price SD. Formation and dissociation of dications of naphthalene, azulene and related heterocyclic compounds. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100359a013] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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43
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Braitbart O, Castellucci E, Dujardin G, Leach S. Radiationless transitions in excited electronic states of the benzene cation in the gas phase. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j150642a008] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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44
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Jochims HW, Rasekh H, Ruehl E, Baumgaertel H, Leach S. Deuterium isotope effects in the photofragmentation of naphthalene monocations. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100109a011] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
Lesion studies have demonstrated that frequency memory, or memory for the frequency of occurrence, is associated with prefrontal and not temporal lobe lesions. This study examined neural activation during performance on a frequency-memory-judgment task and a recognition-memory task, both using words. Relative to a control task, the authors observed peaks of activation during frequency-memory performance in the left ventrolateral prefrontal cortex (BA 45) and other areas typically associated with working memory (dorsolateral prefrontal cortex, posterior parietal cortex). Recognition performance was associated with activation in the same left ventrolateral prefrontal location as was observed with frequency memory. When comparing activation during frequency memory with activation during recognition memory, the authors found a suppression of activation in the hippocampus bilaterally during frequency memory. This study supports a neuroanatomical distinction between frequency and recognition memory.
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Affiliation(s)
- M W Haut
- Department of Behavioral Medicine and Psychiatry, West Virginia University School of Medicine, Morgantown 26506, USA.
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Abstract
Despite eradication, smallpox still presents a risk to public health whilst laboratory stocks of virus remain. One factor crucial to any assessment of this risk is R0, the average number of secondary cases infected by each primary case. However, recently applied estimates have varied too widely (R0 from 1.5 to >20) to be of practical use, and often appear to disregard contingent factors such as socio-economic conditions and herd immunity. Here we use epidemic modelling to show a more consistent derivation of R0. In isolated pre-twentieth century populations with negligible herd immunity, the numbers of cases initially rose exponentially, with an R0 between 3.5 and 6. Before outbreak controls were applied, smallpox also demonstrated similar levels of transmission in 30 sporadic outbreaks in twentieth century Europe, taking into account pre-existing vaccination levels (about 50%) and the role of hospitals in doubling early transmission. Should smallpox recur, such estimates of transmission potential (R0 from 3.5 to 6) predict a reasonably rapid epidemic rise before the implementation of public health interventions, because little residual herd immunity exists now that vaccination has ceased.
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Affiliation(s)
- R Gani
- Centre for Applied Microbiology and Research, Porton, Down, Salisbury, Wiltshire SP4 0JG, UK
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Bensasson RV, Berberan-Santos MN, Brettreich M, Frederiksen J, Göttinger H, Hirsch A, Land EJ, Leach S, McGarvey DJ, Schönberger H, Schröder C. Triplet state properties of malonic acid C60 derivatives C60[C(COOR)2]n; R = H, Et; n = 1–6. Phys Chem Chem Phys 2001. [DOI: 10.1039/b105430a] [Citation(s) in RCA: 23] [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] [Indexed: 11/21/2022]
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48
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Abstract
Lesion studies have demonstrated that frequency memory, or memory for the frequency of occurrence, is associated with prefrontal and not temporal lobe lesions. This study examined neural activation during performance on a frequency-memory-judgment task and a recognition-memory task, both using words. Relative to a control task, the authors observed peaks of activation during frequency-memory performance in the left ventrolateral prefrontal cortex (BA 45) and other areas typically associated with working memory (dorsolateral prefrontal cortex, posterior parietal cortex). Recognition performance was associated with activation in the same left ventrolateral prefrontal location as was observed with frequency memory. When comparing activation during frequency memory with activation during recognition memory, the authors found a suppression of activation in the hippocampus bilaterally during frequency memory. This study supports a neuroanatomical distinction between frequency and recognition memory.
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Affiliation(s)
- M W Haut
- Department of Behavioral Medicine and Psychiatry, West Virginia University School of Medicine, Morgantown 26506, USA.
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Abstract
Recent advances in neuroimaging have enabled researchers to establish relatively specific areas of the brain that are involved in working memory. In this positron emission tomography study we examined the pattern of neural activation associated with performance on number-letter sequencing, a purported measure of working memory included in the new Wechsler scales for memory and intelligence. After controlling for basic audition, verbalization, and attention, areas of activation were observed in the orbital frontal lobe, dorsolateral prefrontal cortex, and posterior parietal cortex. This is highly consistent with reports from the literature on activation patterns associated with working memory. More activation peaks were observed in the right hemisphere, suggesting the participants utilized visualization of the verbal information. Consistent with task conceptualization, this study provides support for number-letter sequencing as a task involving working memory.
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Affiliation(s)
- M W Haut
- Departments of Behavioral Medicine and Psychiatry, Neurology, and Radiology, West Virginia University School of Medicine, Morgantown, West Virginia, USA.
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Kraev A, Quednau BD, Leach S, Li XF, Dong H, Winkfein R, Perizzolo M, Cai X, Yang R, Philipson KD, Lytton J. Molecular cloning of a third member of the potassium-dependent sodium-calcium exchanger gene family, NCKX3. J Biol Chem 2001; 276:23161-72. [PMID: 11294880 DOI: 10.1074/jbc.m102314200] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We describe here the identification and characterization of a novel member of the family of K(+)-dependent Na(+)/Ca(2+) exchangers, NCKX3 (gene SLC24A3). Human NCKX3 encodes a protein of 644 amino acids that displayed a high level of sequence identity to the other family members, rod NCKX1 and cone/neuronal NCKX2, in the hydrophobic regions surrounding the "alpha -repeat" sequences thought to form the ion-binding pocket for transport. Outside of these regions NCKX3 showed no significant identity to other known proteins. As anticipated from this sequence similarity, NCKX3 displayed K(+)-dependent Na(+)/Ca(2+) exchanger activity when assayed in heterologous expression systems, using digital imaging of fura-2 fluorescence, electrophysiology, or radioactive (45)Ca(2+) uptake. The N-terminal region of NCKX3, although not essential for expression, increased functional activity at least 10-fold and may represent a cleavable signal sequence. NCKX3 transcripts were most abundant in brain, with highest levels found in selected thalamic nuclei, in hippocampal CA1 neurons, and in layer IV of the cerebral cortex. Many other tissues also expressed NCKX3 at lower levels, especially aorta, uterus, and intestine, which are rich in smooth muscle. The discovery of NCKX3 thus expands the K(+)-dependent Na(+)/Ca(2+) exchanger family and suggests this class of transporter has a more widespread role in cellular Ca(2+) handling than previously appreciated.
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Affiliation(s)
- A Kraev
- C. H. Best Institute, Banting and Best Department of Medical Research, University of Toronto, Toronto, Ontario M5G 1L6, Canada
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