1
|
Batac ALR, Golding MA, Merrill KA, Lê ML, Fong AT, Hsu PS, Warren CM, Dadha P, Abrams EM, Chan ES, Ben-Shoshan M, Bilaver LA, Gupta RS, Shroba JA, Kivistö JE, Greenhawt MJ, Mäkelä MJ, Muraro A, Ahlstedt S, Protudjer JLP. A scoping review protocol for evaluating cost questionnaires aimed at measuring the household financial burden of food allergy. Clin Exp Allergy 2024. [PMID: 38733299 DOI: 10.1111/cea.14493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Accepted: 04/30/2024] [Indexed: 05/13/2024]
Affiliation(s)
- Ayel Luis R Batac
- Department of Pediatrics and Child Health, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
- Children's Hospital Research Institute of Manitoba, Winnipeg, Manitoba, Canada
| | - Michael A Golding
- Department of Pediatrics and Child Health, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
- Children's Hospital Research Institute of Manitoba, Winnipeg, Manitoba, Canada
| | - Kaitlyn A Merrill
- Department of Pediatrics and Child Health, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
- Children's Hospital Research Institute of Manitoba, Winnipeg, Manitoba, Canada
| | - Mê-Linh Lê
- Neil John Maclean Health Sciences Library, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Andrew T Fong
- The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Peter S Hsu
- The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Christopher M Warren
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Center for Food Allergy and Asthma Research, Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Priyanka Dadha
- Center for Food Allergy and Asthma Research, Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Elissa M Abrams
- Department of Pediatrics and Child Health, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
- Children's Hospital Research Institute of Manitoba, Winnipeg, Manitoba, Canada
- Division of Allergy, Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Edmond S Chan
- Division of Allergy, Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
- BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
| | - Moshe Ben-Shoshan
- Division of Pediatric Allergy, Clinical Immunology and Dermatology, Department of Pediatrics, Montreal Children's Hospital, Montreal, Quebec, Canada
- Centre for Outcomes Research and Evaluation, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
- Division of Experimental Medicine, Department of Medicine, School of Medicine, Faculty of Medicine and Health Sciences, McGill University, Montreal, Quebec, Canada
| | - Lucy A Bilaver
- Center for Food Allergy and Asthma Research, Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA
| | - Ruchi S Gupta
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Center for Food Allergy and Asthma Research, Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
- Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA
- Division of Allergy and Immunology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Jodi A Shroba
- Division of Allergy and Immunology, Children's Mercy Kansas City, Kansas City, Missouri, USA
| | - Juho E Kivistö
- Allergy Centre, Tampere University Hospital, Tampere, Finland
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Tampere Center for Child, Adolescent and Maternal Health Research, Tampere University, Tampere, Finland
| | - Matthew J Greenhawt
- Section of Allergy and Immunology, Department of Pediatrics, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Mika J Mäkelä
- Department of Allergology, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
- Department of Dermatology, Allergology and Venereology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Antonella Muraro
- Food Allergy Referral Centre, Department of Women's and Children's Health, University of Padua, Padua, Italy
| | - Staffan Ahlstedt
- Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden
| | - Jennifer L P Protudjer
- Department of Pediatrics and Child Health, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
- Children's Hospital Research Institute of Manitoba, Winnipeg, Manitoba, Canada
- Department of Food and Human Nutritional Sciences, Faculty of Agricultural and Food Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
- George and Fay Yee Centre for Healthcare Innovation, Winnipeg, Manitoba, Canada
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| |
Collapse
|
2
|
Khoo WH, Jackson K, Phetsouphanh C, Zaunders JJ, Alquicira-Hernandez J, Yazar S, Ruiz-Diaz S, Singh M, Dhenni R, Kyaw W, Tea F, Merheb V, Lee FX, Burrell R, Howard-Jones A, Koirala A, Zhou L, Yuksel A, Catchpoole DR, Lai CL, Vitagliano TL, Rouet R, Christ D, Tang B, West NP, George S, Gerrard J, Croucher PI, Kelleher AD, Goodnow CG, Sprent JD, Powell JE, Brilot F, Nanan R, Hsu PS, Deenick EK, Britton PN, Phan TG. Tracking the clonal dynamics of SARS-CoV-2-specific T cells in children and adults with mild/asymptomatic COVID-19. Clin Immunol 2023; 246:109209. [PMID: 36539107 PMCID: PMC9758763 DOI: 10.1016/j.clim.2022.109209] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/28/2022] [Accepted: 12/11/2022] [Indexed: 12/23/2022]
Abstract
Children infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) develop less severe coronavirus disease 2019 (COVID-19) than adults. The mechanisms for the age-specific differences and the implications for infection-induced immunity are beginning to be uncovered. We show by longitudinal multimodal analysis that SARS-CoV-2 leaves a small footprint in the circulating T cell compartment in children with mild/asymptomatic COVID-19 compared to adult household contacts with the same disease severity who had more evidence of systemic T cell interferon activation, cytotoxicity and exhaustion. Children harbored diverse polyclonal SARS-CoV-2-specific naïve T cells whereas adults harbored clonally expanded SARS-CoV-2-specific memory T cells. A novel population of naïve interferon-activated T cells is expanded in acute COVID-19 and is recruited into the memory compartment during convalescence in adults but not children. This was associated with the development of robust CD4+ memory T cell responses in adults but not children. These data suggest that rapid clearance of SARS-CoV-2 in children may compromise their cellular immunity and ability to resist reinfection.
Collapse
Affiliation(s)
- Weng Hua Khoo
- Garvan Institute of Medical Research, Sydney, Australia,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | | | | | - John J. Zaunders
- Centre for Applied Medical Research, St Vincent's Hospital, Sydney, Australia
| | - José Alquicira-Hernandez
- Garvan-Weizmann Centre for Cellular Genomics, Garvan Institute of Medical Research, Sydney, Australia,Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia
| | - Seyhan Yazar
- Garvan-Weizmann Centre for Cellular Genomics, Garvan Institute of Medical Research, Sydney, Australia
| | | | - Mandeep Singh
- Garvan Institute of Medical Research, Sydney, Australia,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | - Rama Dhenni
- Garvan Institute of Medical Research, Sydney, Australia,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | - Wunna Kyaw
- Garvan Institute of Medical Research, Sydney, Australia,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | - Fiona Tea
- Brain Autoimmunity Group, Kids Neuroscience Centre, Kids Research at the Children's Hospital at Westmead, Sydney, Australia
| | - Vera Merheb
- Brain Autoimmunity Group, Kids Neuroscience Centre, Kids Research at the Children's Hospital at Westmead, Sydney, Australia
| | - Fiona X.Z. Lee
- Brain Autoimmunity Group, Kids Neuroscience Centre, Kids Research at the Children's Hospital at Westmead, Sydney, Australia
| | - Rebecca Burrell
- Sydney Medical School, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | | | - Archana Koirala
- Kids Research, The Children's Hospital at Westmead, Sydney, Australia
| | - Li Zhou
- Kids Research, The Children's Hospital at Westmead, Sydney, Australia
| | - Aysen Yuksel
- Kids Research, The Children's Hospital at Westmead, Sydney, Australia
| | - Daniel R. Catchpoole
- Kids Research, The Children's Hospital at Westmead, Sydney, Australia,Discipline of Child and Adolescent Health, The University of Sydney, Sydney, Australia
| | - Catherine L. Lai
- Kids Research, The Children's Hospital at Westmead, Sydney, Australia
| | | | - Romain Rouet
- Garvan Institute of Medical Research, Sydney, Australia,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | - Daniel Christ
- Garvan Institute of Medical Research, Sydney, Australia,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | - Benjamin Tang
- Department of Intensive Care Medicine, Nepean Hospital, Sydney, Australia,Centre for Immunology and Allergy Research, The Westmead Institute for Medical Research, Sydney, Australia,Respiratory Tract Infection Research Node, Marie Bashir Institute for Infectious Diseases and Biosecurity, Sydney, Australia
| | - Nicholas P. West
- Systems Biology and Data Science, Menzies Health Institute QLD, Griffith University, Parklands, Australia
| | - Shane George
- Departments of Emergency Medicine and Children's Critical Care, Gold Coast University Hospital, Southport, QLD, Australia,School of Medicine and Menzies Health Institute Queensland, Griffith University, Southport, QLD, Australia
| | - John Gerrard
- Department of Infectious Diseases and Immunology, Gold Coast University Hospital, Southport, QLD, Australia
| | - Peter I. Croucher
- Garvan Institute of Medical Research, Sydney, Australia,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | | | - Christopher G. Goodnow
- Garvan Institute of Medical Research, Sydney, Australia,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, Australia,UNSW Cellular Genomics Futures Institute, UNSW Sydney, Sydney, Australia
| | - Jonathan D. Sprent
- Garvan Institute of Medical Research, Sydney, Australia,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | - Joseph E. Powell
- Garvan-Weizmann Centre for Cellular Genomics, Garvan Institute of Medical Research, Sydney, Australia,UNSW Cellular Genomics Futures Institute, UNSW Sydney, Sydney, Australia
| | - Fabienne Brilot
- Brain Autoimmunity Group, Kids Neuroscience Centre, Kids Research at the Children's Hospital at Westmead, Sydney, Australia,Sydney Institute for Infectious Diseases, The University of Sydney, Sydney, Australia,Brain and Mind Centre, The University of Sydney, Sydney, Australia
| | - Ralph Nanan
- Charles Perkins Centre Nepean, University of Sydney, Sydney, Australia
| | - Peter S. Hsu
- Kids Research, The Children's Hospital at Westmead, Sydney, Australia,Discipline of Child and Adolescent Health, The University of Sydney, Sydney, Australia
| | - Elissa K. Deenick
- Garvan Institute of Medical Research, Sydney, Australia,Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | - Philip N. Britton
- Sydney Medical School, Faculty of Medicine and Health, University of Sydney, Sydney, Australia,The Children's Hospital at Westmead, Sydney Children's Hospitals Network, Sydney, Australia
| | - Tri Giang Phan
- Garvan Institute of Medical Research, Sydney, Australia; St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, Australia.
| |
Collapse
|
3
|
Palmer DJ, Sullivan TR, Campbell DE, Nanan R, Gold MS, Hsu PS, Netting MJ, McWilliam V, Koplin JJ, Perrett KP, Quinn P, O'Sullivan M, Prescott SL, Grivell R, Makrides M. PrEggNut Study: protocol for a randomised controlled trial investigating the effect of a maternal diet rich in eggs and peanuts from <23 weeks' gestation during pregnancy to 4 months' lactation on infant IgE-mediated egg and peanut allergy outcomes. BMJ Open 2022; 12:e056925. [PMID: 35697444 PMCID: PMC9196184 DOI: 10.1136/bmjopen-2021-056925] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION Clinical studies supported by immunological data indicate early life intervention strategies to be promising in reducing the growing global burden of food allergies. The events that predispose to food allergy, including the induction of allergen-specific immune responses, appear to be initiated early in development. Early exposure to food allergens in utero and via breast milk is likely to be important in initiating oral tolerance. We aim to determine the effectiveness of higher maternal food allergen consumption during pregnancy and lactation on infant food allergy outcomes. METHODS AND ANALYSIS This is a multisite, parallel, two-arm (1:1 allocation), single-blinded (outcome assessors, statistical analyst and investigators), randomised controlled trial. Pregnant women (<23 weeks' gestation) whose (unborn) infants have at least two biological family members (mother, father or siblings) with medically diagnosed allergic disease are eligible to participate. After obtaining written informed consent, pregnant women are randomised to either a high egg and peanut diet (at least 6 eggs and 60 peanuts per week) or standard (low) egg and peanut diet (no more than 3 eggs and 30 peanuts per week). The women are asked to follow their allocated diet from <23 weeks' gestation to 4 months' lactation. The primary outcome is food challenge proven IgE-mediated egg and/or peanut allergy in the infants at 12 months of age. Key secondary outcomes include infant sensitisation to egg and/or peanut and infant eczema. Our target sample size is 2136 women. Analyses will be performed on an intention-to-treat basis according to a pre-specified statistical analysis plan. ETHICS AND DISSEMINATION Ethical approval has been granted from the Women's and Children's Health Network Human Research Ethics Committee (approval number HREC/18/WCHN/42). Trial results will be presented at scientific conferences and published in peer-reviewed journals. TRIAL REGISTRATION NUMBER Australian New Zealand Clinical Trials Registry ACTRN12618000937213.
Collapse
Affiliation(s)
- Debra J Palmer
- Telethon Kids Institute, The University of Western Australia, Nedlands, Western Australia, Australia
- UWA Medical School, The University of Western Australia, Perth, Western Australia, Australia
| | - Thomas R Sullivan
- SAHMRI Women and Kids, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
- School of Public Health, The University of Adelaide, Adelaide, South Australia, Australia
| | - Dianne E Campbell
- Discipline of Child and Adolescent Health, The University of Sydney, Lidcombe, New South Wales, Australia
- Department of Allergy and Immunology; and Kids Research, The Children's Hospital at Westmead, Westmead, New South Wales, Australia
| | - Ralph Nanan
- Charles Perkins Center, The University of Sydney, Sydney, New South Wales, Australia
- Sydney Medical School Nepean, The University of Sydney, Sydney, New South Wales, Australia
| | - Michael S Gold
- Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, South Australia, Australia
- Department of Allergy and Clinical Immunology, Women's and Children's Health Network, North Adelaide, South Australia, Australia
| | - Peter S Hsu
- Discipline of Child and Adolescent Health, The University of Sydney, Lidcombe, New South Wales, Australia
- Department of Allergy and Immunology; and Kids Research, The Children's Hospital at Westmead, Westmead, New South Wales, Australia
| | - Merryn J Netting
- SAHMRI Women and Kids, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
- Department of Nutrition, Women's and Children's Health Network, North Adelaide, South Australia, Australia
| | - Vicki McWilliam
- Murdoch Childrens Research Institute, Parkville, Victoria, Australia
- Department of Allergy and Immunology, The Royal Children's Hospital Melbourne, Parkville, Victoria, Australia
| | - Jennifer J Koplin
- Murdoch Childrens Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, The University of Melbourne, Melbourne, Victoria, Australia
| | - Kirsten P Perrett
- Department of Allergy and Immunology, The Royal Children's Hospital Melbourne, Parkville, Victoria, Australia
- Department of Paediatrics, The University of Melbourne, Melbourne, Victoria, Australia
| | - Patrick Quinn
- Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, South Australia, Australia
- Department of Allergy and Clinical Immunology, Women's and Children's Health Network, North Adelaide, South Australia, Australia
| | - Michael O'Sullivan
- Faculty of Medicine Dentistry and Health Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Immunology Department, Perth Children's Hospital, Nedlands, Western Australia, Australia
| | - Susan L Prescott
- Telethon Kids Institute, The University of Western Australia, Nedlands, Western Australia, Australia
- Immunology Department, Perth Children's Hospital, Nedlands, Western Australia, Australia
| | - Rosalie Grivell
- Department of Obstetrics Gynaecology and Reproductive Medicine, Flinders University, Bedford Park, South Australia, Australia
| | - Maria Makrides
- SAHMRI Women and Kids, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia
- Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| |
Collapse
|
4
|
Lai CL, Campbell DE, Palmer DJ, Makrides M, Santner‐Nanan B, Gold M, Tan JW, Valerio C, Nanan R, Prescott SL, Hsu PS. Longitudinal egg-specific regulatory T- and B-cell development: Insights from primary prevention clinical trials examining the timing of egg introduction. Allergy 2021; 76:1385-1397. [PMID: 33040362 DOI: 10.1111/all.14621] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/02/2020] [Accepted: 09/30/2020] [Indexed: 01/13/2023]
Abstract
BACKGROUND Egg allergy affects almost 1 in 10 Australian infants. Early egg introduction has been associated with a reduced risk in developing egg allergy; however, the immune mechanisms underlying this protection remain unclear. OBJECTIVE To examine the role of regulatory immune cells in tolerance induction during early egg introduction. METHODS Cryopreserved peripheral blood mononuclear cells (PBMC) were obtained from infants from 2 randomized controlled trials of early introduction of egg for the primary prevention of egg allergy; BEAT (at 12 months, n = 42) and STEP (at 5 months n = 82; 12 months n = 82) study cohorts. In vitro ovalbumin-stimulated PBMC were analyzed by flow cytometry for presence of ovalbumin-specific regulatory T cells, using activation markers, FoxP3, and IL-10 expression. Ovalbumin-specific regulatory B cells were identified by co-expression of fluorescence-conjugated ovalbumin and IL-10. RESULTS Specific, age-dependent expansion of ovalbumin-specific regulatory T cells was only observed in infants who (a) had early egg introduction and (b) did not have egg allergy at 12 months. This expansion was blunted or impaired in children who did not undergo early egg introduction and in those with clinical egg allergy at 12 months. Infants with egg allergy at 12 months of age also had reduced frequency of ovalbumin-specific regulatory B cells compared to egg-tolerant infants. CONCLUSION Early egg introduction and clinical tolerance to egg were associated with expansion of ovalbumin-specific T and B regulatory cells, which may be an important developmental process for tolerance acquisition to food allergens.
Collapse
Affiliation(s)
- Catherine L. Lai
- Department of Allergy and Immunology The Children’s Hospital at Westmead Westmead NSW Australia
- Kids Research Institute The Children’s Hospital at Westmead Westmead NSW Australia
- Discipline of Paediatrics and Child Health The University of Sydney Sydney NSW Australia
- Murdoch Children’s Research Institute Centre for Food Allergy Research (CFAR) Parkville Vic Australia
| | - Dianne E. Campbell
- Department of Allergy and Immunology The Children’s Hospital at Westmead Westmead NSW Australia
- Kids Research Institute The Children’s Hospital at Westmead Westmead NSW Australia
- Discipline of Paediatrics and Child Health The University of Sydney Sydney NSW Australia
- Murdoch Children’s Research Institute Centre for Food Allergy Research (CFAR) Parkville Vic Australia
| | - Debra J. Palmer
- Murdoch Children’s Research Institute Centre for Food Allergy Research (CFAR) Parkville Vic Australia
- Telethon Kids Institute The University of Western Australia Nedlands WA Australia
- School of Medicine The University of Western Australia, Crawley WA Australia
| | - Maria Makrides
- South Australian Health and Medical Research Institute SAHMRI Women and Kids Adelaide SA Australia
- School of Medicine University of Adelaide Adelaide SA Australia
| | - Brigitte Santner‐Nanan
- Sydney Medical School Nepean and Charles Perkins Centre Nepean The University of Sydney Kingswood NSW Australia
| | - Michael Gold
- Discipline of Paediatrics School of Medicine University of Adelaide Adelaide SA Australia
| | - John Wei‐Liang Tan
- Department of Allergy and Immunology The Children’s Hospital at Westmead Westmead NSW Australia
| | - Carol Valerio
- Department of Allergy and Immunology The Children’s Hospital at Westmead Westmead NSW Australia
| | - Ralph Nanan
- Sydney Medical School Nepean and Charles Perkins Centre Nepean The University of Sydney Kingswood NSW Australia
| | - Susan L. Prescott
- Murdoch Children’s Research Institute Centre for Food Allergy Research (CFAR) Parkville Vic Australia
- The ORIGINS Project Telethon Kids Institute University of Western AustraliaPerth Children’s Hospital Nedlands WA Australia
- InVIVO Planetary Health of the Worldwide Universities Network (WUN) West New York NJ USA
| | - Peter S. Hsu
- Department of Allergy and Immunology The Children’s Hospital at Westmead Westmead NSW Australia
- Kids Research Institute The Children’s Hospital at Westmead Westmead NSW Australia
- Discipline of Paediatrics and Child Health The University of Sydney Sydney NSW Australia
- Murdoch Children’s Research Institute Centre for Food Allergy Research (CFAR) Parkville Vic Australia
| |
Collapse
|
5
|
Izaki S, Hibino T, Isozaki Y, Hsu PS, Izaki M, Matsuo O. Plasminogen Activator and Plasminogen Activator Inhibitor Associated with Granulomatous Inflammation: A Study with Murine Leprosy. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1661188] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
SummaryPlasminogen activator that is associated with the development of hypersensitivity granulomas (gPA) was partially purified from a saline soluble fraction of murine lepromas elicited in “resistant” mice, C57BL/6N. The gPA was shown to consist of two subspecies (23,000 and 48,000 in molecular weight) with essentially identical enzymologic properties. The gPA was found to be a relatively heat stable weakly alkaline serine proteinase with trypsin-like characteristics in the specificity for synthetic substrates and proteinase inhibitors. It showed a high affinity for H- D-Ile-Pro-Arg-pNA (Km = 1.4 × 10-4 M) H-D-Val-Leu-Lys- pNA (Km = 5.2 × 10-4 M), and L-pyroGlu-Gly-Arg-pNA (Km = 9.3 × 10-4 M). The gPA did not demonstrate antigenic cross reaction with urokinase-type or tissue-type plasminogen activator.Two distinct enzymatic regulators of the gPA were also demonstrated in the saline soluble fraction of the hypersensitivity granulomas. The gPA and its regulation are assumed to be correlated with macrophage activation in the hypersensitivity granulomas
Collapse
Affiliation(s)
- S Izaki
- The Department of Dermatology, Iwate Medical University School of Medicine, Morloka, Iwate, Japan
| | - T Hibino
- The Department of Dermatology, Iwate Medical University School of Medicine, Morloka, Iwate, Japan
| | - Y Isozaki
- The Department of Dermatology, Iwate Medical University School of Medicine, Morloka, Iwate, Japan
| | - P S Hsu
- The Department of Dermatology, Iwate Medical University School of Medicine, Morloka, Iwate, Japan
| | - M Izaki
- The Department of Dermatology, Iwate Medical University School of Medicine, Morloka, Iwate, Japan
| | - O Matsuo
- The Department of Physiology, Kinki University School of Medicine, Sayama, Osaka, Japan
| |
Collapse
|
6
|
Halls BR, Hsu PS, Roy S, Meyer TR, Gord JR. Two-color volumetric laser-induced fluorescence for 3D OH and temperature fields in turbulent reacting flows. Opt Lett 2018; 43:2961-2964. [PMID: 29905734 DOI: 10.1364/ol.43.002961] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 05/11/2018] [Indexed: 06/08/2023]
Abstract
Single-shot, two-color, volumetric laser-induced fluorescence was demonstrated for three-dimensional (3D), tomographic imaging of the structural properties of the OH radical and temperature field in a turbulent hydrogen-air flame. Two narrowband laser sources were tuned to the Q1(5) and Q1(14) transitions of the (1,0) band in the A2Σ←X2Π system and illuminated a volumetric region of the flame. Images from eight unique perspectives collected simultaneously from each of the two transitions were used to reconstruct overlapping OH fields with different Boltzmann fractions and map the 3D temperature distribution with nanosecond precision. Key strategies for minimizing sources of error, such as detector sensitivity and spatial overlap of the two fields, are discussed.
Collapse
|
7
|
Hsu PS, Lai CL, Hu M, Santner-Nanan B, Dahlstrom JE, Lee CH, Ajmal A, Bullman A, Arbuckle S, Al Saedi A, Gacis L, Nambiar R, Williams A, Wong M, Campbell DE, Nanan R. IL-2 Enhances Gut Homing Potential of Human Naive Regulatory T Cells Early in Life. J I 2018; 200:3970-3980. [DOI: 10.4049/jimmunol.1701533] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 04/11/2018] [Indexed: 01/19/2023]
|
8
|
Abstract
Breast feeding has been associated with improved infant outcomes in multiple aspects, including immune outcomes such as infections and potentially atopy and autoimmunity. However associations do not necessarily implicate cause and effect and at this point, exactly how breast feeding and components of breast milk may modulate the infant's immune compartment remains unclear, especially in humans. Some lines of evidence suggest that breastfeeding affects the development of the infant's thymus, a critical organ for T cell development. This may be a direct effect mediated by breast milk components or alternatively, a secondary effect from the impact of breast feeding on the infant's gut microbiome. Here we discuss the potential mechanisms and impact of this association between breast feeding and thymic development.
Collapse
Affiliation(s)
- Peter S Hsu
- Allergy and Immunology, Kids Research, The Children's Hospital at Westmead, Sydney, NSW, Australia.,Discipline of Child and Adolescent Health, The University of Sydney, Sydney, NSW, Australia
| | - Ralph Nanan
- Charles Perkins Centre Nepean, University of Sydney, Sydney, NSW, Australia
| |
Collapse
|
9
|
Lin CT, Huang TW, Lee SC, Kuo SM, Hsu KF, Hsu PS, Huang HK, Chang H. Sengstaken-Blakemore tube related esophageal rupture. Rev Esp Enferm Dig 2010; 102:395-6. [PMID: 20575606 DOI: 10.4321/s1130-01082010000600014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
10
|
Lin CT, Hsu KF, Hsu PS, Wu CC, Kuo SM, Fu CY, Hong ZJ, Jao SW. Co-existing primary intra-abdominal and pelvic myxoid liposarcomas: report of a case. Rev Esp Enferm Dig 2010; 102:284-5. [PMID: 20486753 DOI: 10.4321/s1130-01082010000400012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
11
|
Izaki S, Hibino T, Tanji O, Hsu PS, Segawa I, Kon S. Modulation of plasma and tissue kallikreins in psoriasis vulgaris and psoriasis pustulosa. Dermatologica 1989; 179 Suppl 1:116-7. [PMID: 2673852 DOI: 10.1159/000248461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- S Izaki
- Department of Dermatology, Iwate Medical University School of Medicine, Morioka, Japan
| | | | | | | | | | | |
Collapse
|
12
|
Abstract
Proteolytic activity for [3H]elastin, pyro-Glu-Pro-Val-pNA(S-2484), and Suc-(Ala)3-pNA(AAApNA) was demonstrated in the bound fraction extracted with 2 M KSCN + 0.1% Triton X-100 from hypersensitivity-type murine lepromas in C57BL/6N mice, while elastase-inhibitor activity was separately observed in the soluble fraction extracted with a Tris-saline buffer. Sephacryl S-200 gel chromatography showed a peak of elastolytic activity with approximately 20,000 in molecular weight. The following DEAE-Sepharose chromatography demonstrated three fractions of elastolytic activity (E-I, II, III). The inhibitory profile showed that E-I is a thiol proteinase, while E-II and E-III belong to serine proteinase-type elastases. Both E-II and E-III showed different properties with neutrophil elastase or elastase secreted from cultured macrophages, but identical characteristics to membrane bound-type elastase of monocytes. A lower level of elastolytic activity was detected in the bound fraction of nonhypersensitivity-type murine lepromas in CBA/N mice, suggesting a more involvement of membrane bound-type elastase from monocytes/macrophages during the tissue remodelings of hypersensitivity-type granulomas.
Collapse
|
13
|
Abstract
Elastases have been reported to be involved in various types of tissue injury. In this study we detected hydrolytic activities for [3H]-elastin and Suc-Ala-Ala-Ala-pNA (SLAPN) in hepatic granulomas which became elevated in parallel with enlargement of the granulomas and disappearance of aldehyde-fuchsin-stained filaments in the lesions of mice infected with Schistosoma mansoni. The elastase was partially purified by gel filtration followed by anion-exchange chromatography. This enzyme has a molecular weight of 20-25k and hydrolyzed denatured collagen (azocoll), Glu-Pro-Val-pNA, SLAPN, and [3H]-elastin. Optimal pH was 7-8.5. It is a serine proteinase and distinct in its inhibitor profile from murine peritoneal macrophage elastase, which has been reported by others. Digestion of elastic fibers in vessel walls and fine fibrils in newly developed granulomas by the granuloma elastase was histochemically identified with aldehyde-fuchsin stain. These results indicate that a serine proteinase functions as a major elastase in granulomatous tissue remodeling and may account for the disappearance of elastic fibers and other elements of the matrix in fully developed granulomas.
Collapse
|
14
|
Izaki S, Hibino T, Isozaki Y, Hsu PS, Izaki M, Matsuo O. Plasminogen activator and plasminogen activator inhibitor associated with granulomatous inflammation: a study with murine leprosy. Thromb Haemost 1984; 52:243-9. [PMID: 6397870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Plasminogen activator that is associated with the development of hypersensitivity granulomas (gPA) was partially purified from a saline soluble fraction of murine lepromas elicited in "resistant" mice, C57BL/6N. The gPA was shown to consist of two subspecies (23,000 and 48,000 in molecular weight) with essentially identical enzymologic properties. The gPA was found to be a relatively heat stable weakly alkaline serine proteinase with trypsin-like characteristics in the specificity for synthetic substrates and proteinase inhibitors. It showed a high affinity for H-D-Ile-Pro-Arg-pNA (Km = 1.4 X 10(-4) M) H-D-Val-Leu-Lys-pNA (Km = 5.2 X 10(-4) M), and L-pyroGlu-Gly-Arg-pNA (Km = 9.3 X 10(-4) M). The gPA did not demonstrate antigenic cross reaction with urokinase-type or tissue-type plasminogen activator. Two distinct enzymatic regulators of the gPA were also demonstrated in the saline soluble fraction of the hypersensitivity granulomas. The gPA and its regulation are assumed to be correlated with macrophage activation in the hypersensitivity granulomas.
Collapse
|
15
|
Hsu PS. [A study of the botanical origin of the Chinese drug pai-tsiang]. Yao Xue Xue Bao 1965; 12:533-40. [PMID: 5899129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|