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Gold M, Bacharier LB, Hartert TV, Rosas-Salazar C. Use of Antibiotics in Infancy and Asthma in Childhood: Confounded or Causal Relationship? A Critical Review of the Literature. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2024; 12:2669-2677. [PMID: 38901616 DOI: 10.1016/j.jaip.2024.06.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/05/2024] [Accepted: 06/07/2024] [Indexed: 06/22/2024]
Abstract
Childhood asthma is among the most common chronic lung diseases in the pediatric population, having substantial consequences on the everyday life of children and their caregivers. There remains a lack of a singular, efficacious strategy for averting the inception of childhood asthma. The rate of pediatric antibiotic usage continues to be high, which makes it crucial to understand whether there exists a causal link between the use of antibiotics in infancy and the development of asthma in childhood. In this rostrum, we conduct a critical review of the literature concerning the association of infant antibiotic use and the onset of childhood asthma. Drawing on the results of 5 meta-analyses addressing this topic and of a recent randomized controlled trial, a notable association emerges between antibiotic exposure in the first year of life and the occurrence of childhood asthma that appears to be beyond potential study limitations (such as reverse causation, confounding by indication, and recall bias). Furthermore, we highlight the need for additional research in this field that could improve our understanding of important aspects of this association and lead to the design of an intervention aimed to deliver antibiotics safely during early life and reduce the burden of childhood asthma.
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Grijincu M, Buzan MR, Zbîrcea LE, Păunescu V, Panaitescu C. Prenatal Factors in the Development of Allergic Diseases. Int J Mol Sci 2024; 25:6359. [PMID: 38928067 PMCID: PMC11204337 DOI: 10.3390/ijms25126359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 06/03/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024] Open
Abstract
Allergic diseases are showing increasing prevalence in Western societies. They are characterized by a heightened reactivity towards otherwise harmless environmental stimuli. Allergic diseases showing a wide range of severity of symptoms have a significant impact on the quality of life of affected individuals. This study aims to highlight the mechanisms that induce these reactions, how they progress, and which prenatal factors influence their development. Most frequently, the reaction is mediated by immunoglobulin E (IgE) produced by B cells, which binds to the surface of mast cells and basophils and triggers an inflammatory response. The antibody response is triggered by a shift in T-cell immune response. The symptoms often start in early childhood with eczema or atopic dermatitis and progress to allergic asthma in adolescence. An important determinant of allergic diseases seems to be parental, especially maternal history of allergy. Around 30% of children of allergic mothers develop allergic sensitization in childhood. Genes involved in the regulation of the epithelial barrier function and the T-cell response were found to affect the predisposition to developing allergic disorders. Cord blood IgE was found to be a promising predictor of allergic disease development. Fetal B cells produce IgE starting at the 20th gestation week. These fetal B cells could be sensitized together with mast cells by maternal IgE and IgE-allergen complexes crossing the placental barrier via the low-affinity IgE receptor. Various factors were found to facilitate these sensitizations, including pesticides, drugs, exposure to cigarette smoke and maternal uncontrolled asthma. Prenatal exposure to microbial infections and maternal IgG appeared to play a role in the regulation of T-cell response, indicating a protective effect against allergy development. Additional preventive factors were dietary intake of vitamin D and omega 3 fatty acids as well as decreased maternal IgE levels. The effect of exposure to food allergens during pregnancy was inconclusive, with studies having found both sensitizing and protective effects. In conclusion, prenatal factors including genetics, epigenetics and fetal environmental factors have an important role in the development of allergic disorders in later life. Children with a genetic predisposition are at risk when exposed to cigarette smoke as well as increased maternal IgE in the prenatal period. Maternal diet during pregnancy and immunization against certain allergens could help in the prevention of allergy in predisposed children.
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Affiliation(s)
- Manuela Grijincu
- Center of Immuno-Physiology and Biotechnologies, Department of Functional Sciences, Victor Babeș University of Medicine and Pharmacy, 300041 Timișoara, Romania
- OncoGen Center, Pius Brînzeu County Clinical Emergency Hospital, 300723 Timișoara, Romania
| | - Maria-Roxana Buzan
- Center of Immuno-Physiology and Biotechnologies, Department of Functional Sciences, Victor Babeș University of Medicine and Pharmacy, 300041 Timișoara, Romania
- OncoGen Center, Pius Brînzeu County Clinical Emergency Hospital, 300723 Timișoara, Romania
| | - Lauriana-Eunice Zbîrcea
- Center of Immuno-Physiology and Biotechnologies, Department of Functional Sciences, Victor Babeș University of Medicine and Pharmacy, 300041 Timișoara, Romania
- OncoGen Center, Pius Brînzeu County Clinical Emergency Hospital, 300723 Timișoara, Romania
| | - Virgil Păunescu
- Center of Immuno-Physiology and Biotechnologies, Department of Functional Sciences, Victor Babeș University of Medicine and Pharmacy, 300041 Timișoara, Romania
- OncoGen Center, Pius Brînzeu County Clinical Emergency Hospital, 300723 Timișoara, Romania
| | - Carmen Panaitescu
- Center of Immuno-Physiology and Biotechnologies, Department of Functional Sciences, Victor Babeș University of Medicine and Pharmacy, 300041 Timișoara, Romania
- OncoGen Center, Pius Brînzeu County Clinical Emergency Hospital, 300723 Timișoara, Romania
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Peng Z, Apfelbacher C, Brandstetter S, Eils R, Kabesch M, Lehmann I, Trump S, Wellmann S, Genuneit J. Directed acyclic graph for epidemiological studies in childhood food allergy: Construction, user's guide, and application. Allergy 2024. [PMID: 38234010 DOI: 10.1111/all.16025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 11/28/2023] [Accepted: 01/05/2024] [Indexed: 01/19/2024]
Abstract
Understanding modifiable prenatal and early life causal determinants of food allergy is important for the prevention of the disease. Randomized clinical trials studying environmental and dietary determinants of food allergy may not always be feasible. Identifying risk/protective factors for early-life food allergy often relies on observational studies, which may be affected by confounding bias. The directed acyclic graph (DAG) is a causal diagram useful to guide causal inference from observational epidemiological research. To date, research on food allergy has made little use of this promising method. We performed a literature review of existing evidence with a systematic search, synthesized 32 known risk/protective factors, and constructed a comprehensive DAG for early-life food allergy development. We present an easy-to-use online tool for researchers to re-construct, amend, and modify the DAG along with a user's guide to minimize confounding bias. We estimated that adjustment strategies in 57% of previous observational studies on modifiable factors of childhood food allergy could be improved if the researchers determined their adjustment sets by DAG. Future researchers who are interested in the causal inference of food allergy development in early life can apply the DAG to identify covariates that should and should not be controlled in observational studies.
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Affiliation(s)
- Zhuoxin Peng
- Pediatric Epidemiology, Department of Pediatrics, Medical Faculty, Leipzig University, Leipzig, Germany
| | - Christian Apfelbacher
- Institute of Social Medicine and Health Systems Research, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Susanne Brandstetter
- Member of the Research and Development Campus Regensburg (WECARE) at the Clinic St. Hedwig, Regensburg, Germany
- University Children's Hospital Regensburg (KUNO-Clinics), University of Regensburg, Clinic St. Hedwig, Regensburg, Germany
| | - Roland Eils
- Center for Digital Health, Berlin Institute of Health (BIH) at Charité-Universitatsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- German Center for Lung Research (DZL), Associated Partner Site, Berlin, Germany
- German Center of Child and Youth Health (DZKJ), Germany
| | - Michael Kabesch
- Member of the Research and Development Campus Regensburg (WECARE) at the Clinic St. Hedwig, Regensburg, Germany
- University Children's Hospital Regensburg (KUNO-Clinics), University of Regensburg, Clinic St. Hedwig, Regensburg, Germany
| | - Irina Lehmann
- German Center for Lung Research (DZL), Associated Partner Site, Berlin, Germany
- German Center of Child and Youth Health (DZKJ), Germany
- Molecular Epidemiology Unit, Berlin Institute of Health at Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Saskia Trump
- Molecular Epidemiology Unit, Berlin Institute of Health at Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Sven Wellmann
- Department of Neonatology, University Children's Hospital Regensburg (KUNO), Hospital St. Hedwig of the Order of St. John, University of Regensburg, Regensburg, Germany
| | - Jon Genuneit
- Pediatric Epidemiology, Department of Pediatrics, Medical Faculty, Leipzig University, Leipzig, Germany
- German Center of Child and Youth Health (DZKJ), Germany
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Sillcox C, Gabrielli S, O'Keefe A, McCusker C, Abrams EM, Eiwegger T, Atkinson A, Kim V, Copaescu AM, Ben-Shoshan M. Assessing Pediatric Cephalosporin Allergic Reactions Through Direct Graded Oral Challenges. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2024; 12:156-164.e4. [PMID: 37832819 DOI: 10.1016/j.jaip.2023.10.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/29/2023] [Accepted: 10/02/2023] [Indexed: 10/15/2023]
Abstract
BACKGROUND Cephalosporins, β-lactam antibiotics, commonly cause allergic reactions. OBJECTIVE To assess the clinical characteristics and management of pediatric patients with suspected cephalosporin allergy using direct graded oral challenges (GOCs). METHODS Children referred for suspected cephalosporin allergy at 4 Canadian clinics were recruited over 10 years. Data on demographics, clinical reaction characteristics, and management were collected through a questionnaire. Patients underwent a direct GOC (initially 10% of the treatment dose, then 90% after 20 min), and reactions were monitored 1 week postchallenge. Families were contacted annually for up to 5 years to detect subsequent antibiotic reactions. Logistic regression analysis identified factors associated with positive GOC reactions. RESULTS Among the 136 patients reporting cephalosporin allergy, 75 (55.1%) were males with a median age of 3.9 years (interquartile range 2.3-8.7). Cefprozil represented the most common cephalosporin linked to the index reaction (67.6% of cases). Of the 136 direct GOCs, 5.1% had an immediate and 4.4% a nonimmediate reaction, respectively. Positive GOCs conducted in children with a history of skin-limited nonsevere rashes were classified as mild, benign skin rashes. Positive GOCs were more likely in children with food allergies (adjusted odds ratio 1.14; 95% confidence interval [95% CI] 1.00-1.29). CONCLUSIONS Direct GOCs are safe and effective for diagnosing pediatric cases that report nonvesicular skin-limited symptoms while being treated with cephalosporins.
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Affiliation(s)
- Carly Sillcox
- Division of Allergy and Clinical Immunology, Department of Pediatrics, Montreal Children's Hospital, McGill University Health Centre, Montreal, Quebec, Canada.
| | - Sofianne Gabrielli
- Division of Allergy and Clinical Immunology, Department of Pediatrics, Montreal Children's Hospital, McGill University Health Centre, Montreal, Quebec, Canada
| | - Andrew O'Keefe
- Department of Pediatrics, Faculty of Medicine, Memorial University, St. John's, NL, Canada
| | - Christine McCusker
- Division of Allergy and Clinical Immunology, Department of Pediatrics, Montreal Children's Hospital, McGill University Health Centre, Montreal, Quebec, Canada
| | - Elissa M Abrams
- Department of Pediatrics and Child Health, Section of Allergy and Clinical Immunology, Children's Hospital Research Institute of Manitoba, Winnipeg, Man, Canada
| | - Thomas Eiwegger
- Karl Landsteiner University of Health Sciences, Krems an der Donau, Austria; Department of Pediatric and Adolescent Medicine, University Hospital St. Pölten, St. Pölten, Austria; Translational Medicine Program, Research Institute, The Hospital for Sick Children, Toronto, Ont, Canada; Department of Immunology, Temerty Faculty of Medicine, University of Toronto, Toronto, Ont, Canada
| | - Adelle Atkinson
- Division of Clinical Immunology and Allergy, Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ont, Canada
| | - Vy Kim
- Division of Clinical Immunology and Allergy, Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ont, Canada
| | - Ana-Maria Copaescu
- Division of Allergy and Clinical Immunology, Montreal General Hospital, McGill University Health Centre, Montreal, Quebec, Canada; Department of Medicine, Austin Health, The University of Melbourne, Heidelberg, Victoria, Australia
| | - Moshe Ben-Shoshan
- Division of Allergy and Clinical Immunology, Department of Pediatrics, Montreal Children's Hospital, McGill University Health Centre, Montreal, Quebec, Canada
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Perveen K, Quach A, Stark MJ, Prescott S, Barry SC, Hii CS, Ferrante A. PKCζ activation promotes maturation of cord blood T cells towards a Th1 IFN-γ propensity. Immunology 2023; 170:359-373. [PMID: 37340593 DOI: 10.1111/imm.13674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 06/08/2023] [Indexed: 06/22/2023] Open
Abstract
A significant number of babies present transiently with low protein kinase C zeta (PKCζ) levels in cord blood T cells (CBTC), associated with reduced ability to transition from a neonatal Th2 to a mature Th1 cytokine bias, leading to a higher risk of developing allergic sensitisation, compared to neonates whose T cells have 'normal' PKCζ levels. However, the importance of PKCζ signalling in regulating their differentiation from a Th2 to a Th1 cytokine phenotype propensity remains undefined. To define the role of PKCζ signalling in the regulation of CBTC differentiation from a Th2 to a Th1cytokine phenotype we have developed a neonatal T cell maturation model which enables the cells to develop to CD45RA- /CD45RO+ T cells while maintaining the Th2 immature cytokine bias, despite having normal levels of PKCζ. The immature cells were treated with phytohaemagglutinin, but in addition with phorbol 12-myristate 13-acetate (PMA), an agonist which does not activate PKCζ. This was compared to development in CBTC in which the cells were transfected to express constitutively active PKCζ. The lack of PKCζ activation by PMA was monitored by western blot for phospho-PKCζ and translocation from cell cytosol to the membrane by confocal microscopy. The findings demonstrate that PMA fails to activate PKCζ in CBTC. The data show that CBTC matured under the influence of the PKC stimulator, PMA, maintain a Th2 cytokine bias, characterised by robust IL-4 and minimal interferon gamma production (IFN-γ), and lack of expression of transcriptional factor, T-bet. This was also reflected in the production of a range of other Th2/Th1 cytokines. Interestingly, introduction of a constitutively active PKCζ mutant into CBTC promoted development towards a Th1 profile with high IFN-γ production. The findings demonstrate that PKCζ signalling is essential for the immature neonatal T cells to transition from a Th2 to a Th1 cytokine production bias.
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Affiliation(s)
- Khalida Perveen
- Department of Immunology, SA Pathology at Women's and Children's Hospital, North Adelaide, Australia
- The Robinson Research Institute and School of Medicine, University of Adelaide, Adelaide, Australia
| | - Alex Quach
- Department of Immunology, SA Pathology at Women's and Children's Hospital, North Adelaide, Australia
- The Robinson Research Institute and School of Medicine, University of Adelaide, Adelaide, Australia
| | - Michael J Stark
- The Robinson Research Institute and School of Medicine, University of Adelaide, Adelaide, Australia
- Department of Neonatal Medicine, Women's and Children's Hospital, North Adelaide, Australia
| | - Susan Prescott
- School of Paediatrics, University of Western Australia, Crawley, Australia
- The ORIGINS Project, Telethon Kids Institute and Perth Children's Hospital, Nedlands, Australia
| | - Simon C Barry
- The Robinson Research Institute and School of Medicine, University of Adelaide, Adelaide, Australia
| | - Charles S Hii
- Department of Immunology, SA Pathology at Women's and Children's Hospital, North Adelaide, Australia
- The Robinson Research Institute and School of Medicine, University of Adelaide, Adelaide, Australia
| | - Antonio Ferrante
- Department of Immunology, SA Pathology at Women's and Children's Hospital, North Adelaide, Australia
- The Robinson Research Institute and School of Medicine, University of Adelaide, Adelaide, Australia
- School of Biological Sciences, University of Adelaide, Adelaide, Australia
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Irvine NA, West AL, Von Gerichten J, Miles EA, Lillycrop KA, Calder PC, Fielding BA, Burdge GC. Exogenous tetracosahexaenoic acid modifies the fatty acid composition of human primary T lymphocytes and Jurkat T cell leukemia cells contingent on cell type. Lipids 2023; 58:185-196. [PMID: 37177900 PMCID: PMC10946481 DOI: 10.1002/lipd.12372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/25/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023]
Abstract
Tetracosahexaenoic acid (24:6ω-3) is an intermediate in the conversion of 18:3ω-3 to 22:6ω-3 in mammals. There is limited information about whether cells can assimilate and metabolize exogenous 24:6ω-3. This study compared the effect of incubation with 24:6ω-3 on the fatty acid composition of two related cell types, primary CD3+ T lymphocytes and Jurkat T cell leukemia, which differ in the integrity of the polyunsaturated fatty acid (PUFA) biosynthesis pathway. 24:6ω-3 was only detected in either cell type when cells were incubated with 24:6ω-3. Incubation with 24:6ω-3 induced similar increments in the amount of 22:6ω-3 in both cell types and modified the homeoviscous adaptations fatty acid composition induced by activation of T lymphocytes. The effect of incubation with 18:3ω-3 compared to 24:6ω-3 on the increment in 22:6ω-3 was tested in Jurkat cells because primary T cells cannot convert 18:3ω-3 to 22:6ω-3. The increment in the 22:6ω-3 content of Jurkat cells incubated with 24:6ω-3 was 19.5-fold greater than that of cells incubated with 18:3ω-3. Acyl-coA oxidase siRNA knockdown decreased the amount of 22:6ω-3 and increased the amount of 24:6ω-3 in Jurkat cells. These findings show exogenous 24:6ω-3 can be incorporated into primary human T lymphocytes and Jurkat cells and induces changes in fatty acid composition consistent with its conversion to 22:6ω-3 via a mechanism involving peroxisomal β-oxidation that is regulated independently from the integrity of the upstream PUFA synthesis pathway. One further implication is that consuming 24:6ω-3 may be an effective alternative means of achieving health benefits attributed to 20:5ω-3 and 22:6ω-3.
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Affiliation(s)
- Nicola A. Irvine
- School of Human Development and Health, Faculty of MedicineUniversity of SouthamptonSouthamptonHampshireUK
| | - Annette L. West
- School of Human Development and Health, Faculty of MedicineUniversity of SouthamptonSouthamptonHampshireUK
| | - Johanna Von Gerichten
- Department of Nutritional Sciences, Faculty of Health and Medical SciencesUniversity of SurreyGuildfordSurreyUK
| | - Elizabeth A. Miles
- School of Human Development and Health, Faculty of MedicineUniversity of SouthamptonSouthamptonHampshireUK
| | - Karen A. Lillycrop
- Centre for Biological Sciences, Faculty of Natural and Environmental SciencesUniversity of SouthamptonSouthamptonHampshireUK
| | - Philip C. Calder
- School of Human Development and Health, Faculty of MedicineUniversity of SouthamptonSouthamptonHampshireUK
- National Institute of Health and Care Research Southampton Biomedical Research CentreUniversity Hospital Southampton National Health Service Foundation Trust and University of SouthamptonSouthamptonHampshireUK
| | - Barbara A. Fielding
- Department of Nutritional Sciences, Faculty of Health and Medical SciencesUniversity of SurreyGuildfordSurreyUK
| | - Graham C. Burdge
- School of Human Development and Health, Faculty of MedicineUniversity of SouthamptonSouthamptonHampshireUK
- National Institute of Health and Care Research Southampton Biomedical Research CentreUniversity Hospital Southampton National Health Service Foundation Trust and University of SouthamptonSouthamptonHampshireUK
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7
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von Gerichten J, West AL, Irvine NA, Miles EA, Calder PC, Lillycrop KA, Burdge GC, Fielding BA. Oxylipin secretion by human CD3 + T lymphocytes in vitro is modified by the exogenous essential fatty acid ratio and life stage. Front Immunol 2023; 14:1206733. [PMID: 37388745 PMCID: PMC10300345 DOI: 10.3389/fimmu.2023.1206733] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 05/30/2023] [Indexed: 07/01/2023] Open
Abstract
Immune function changes across the life stages; for example, senior adults exhibit a tendency towards a weaker cell-mediated immune response and a stronger inflammatory response than younger adults. This might be partly mediated by changes in oxylipin synthesis across the life course. Oxylipins are oxidation products of polyunsaturated fatty acids (PUFAs) that modulate immune function and inflammation. A number of PUFAs are precursors to oxylipins, including the essential fatty acids (EFAs) linoleic acid (LA) and α-linolenic acid (ALA). LA and ALA are also substrates for synthesis of longer chain PUFAs. Studies with stable isotopes have shown that the relative amounts of LA and ALA can influence their partitioning by T lymphocytes between conversion to longer chain PUFAs and to oxylipins. It is not known whether the relative availability of EFA substrates influences the overall pattern of oxylipin secretion by human T cells or if this changes across the life stages. To address this, the oxylipin profile was determined in supernatants from resting and mitogen activated human CD3+ T cell cultures incubated in medium containing an EFA ratio of either 5:1 or 8:1 (LA : ALA). Furthermore, oxylipin profiles in supernatants of T cells from three life stages, namely fetal (derived from umbilical cord blood), adults and seniors, treated with the 5:1 EFA ratio were determined. The extracellular oxylipin profiles were affected more by the EFA ratio than mitogen stimulation such that n-3 PUFA-derived oxylipin concentrations were higher with the 5:1 EFA ratio than the 8:1 ratio, possibly due to PUFA precursor competition for lipoxygenases. 47 oxylipin species were measured in all cell culture supernatants. Extracellular oxylipin concentrations were generally higher for fetal T cells than for T cells from adult and senior donors, although the composition of oxylipins was similar across the life stages. The contribution of oxylipins towards an immunological phenotype might be due to the capacity of T cells to synthesize oxylipins rather than the nature of the oxylipins produced.
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Affiliation(s)
- Johanna von Gerichten
- School of Chemistry and Chemical Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey, United Kingdom
| | - Annette L. West
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, Hampshire, United Kingdom
| | - Nicola A. Irvine
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, Hampshire, United Kingdom
| | - Elizabeth A. Miles
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, Hampshire, United Kingdom
| | - Philip C. Calder
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, Hampshire, United Kingdom
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, Hampshire, United Kingdom
| | - Karen A. Lillycrop
- Centre for Biological Sciences, Faculty of Natural and Environmental Sciences, University of Southampton, Southampton, Hampshire, United Kingdom
| | - Graham C. Burdge
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, Hampshire, United Kingdom
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, Hampshire, United Kingdom
| | - Barbara A. Fielding
- Department of Nutritional Sciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, United Kingdom
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8
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Huang C, Li C, Liu F, Xu R. Vaccination and risky behaviors: evidence from the hepatitis B vaccination campaign in China. JOURNAL OF POPULATION ECONOMICS 2023:1-32. [PMID: 37359470 PMCID: PMC9999080 DOI: 10.1007/s00148-023-00942-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 02/03/2023] [Indexed: 06/28/2023]
Abstract
Understanding the causal relationship between vaccination and individuals' risky behavioral responses has important policy implications as it affects the ultimate effectiveness of increasing access to vaccination. This paper examines the causal effects of vaccination on risky behaviors by exploring the 1992 hepatitis B vaccination campaign in China. Our empirical strategy exploits variations in age at the campaign as well as the pretreatment infection risks across provinces. Using a large cross-section of individuals born between 1981 and 1994, we find that more exposure to the hepatitis B vaccination leads to lower alcohol use during adulthood, and such impacts are almost entirely driven by men. Individuals from more educated families and people who live in urban areas tend to react more. Improved educational attainment and dissemination of related knowledge are important contributors. Our results uncover an unexpected benefit of promoting access to vaccination. Supplementary Information The online version contains supplementary material available at 10.1007/s00148-023-00942-4.
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Affiliation(s)
- Chen Huang
- Center for Human Capital and Labor Market Research, Central University of Finance and Economics, Beijing, 100081 China
| | - Cong Li
- School of Economics, Shanghai University of Finance and Economics, Shanghai, 200433 China
| | - Feng Liu
- School of Humanities and Social Science, Chinese University of Hong Kong, Shenzhen, 518172 Guangdong China
| | - Ruofei Xu
- School of Economics, Shanghai University of Finance and Economics, Shanghai, 200433 China
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9
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León B. Understanding the development of Th2 cell-driven allergic airway disease in early life. FRONTIERS IN ALLERGY 2023; 3:1080153. [PMID: 36704753 PMCID: PMC9872036 DOI: 10.3389/falgy.2022.1080153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 12/21/2022] [Indexed: 01/12/2023] Open
Abstract
Allergic diseases, including atopic dermatitis, allergic rhinitis, asthma, and food allergy, are caused by abnormal responses to relatively harmless foreign proteins called allergens found in pollen, fungal spores, house dust mites (HDM), animal dander, or certain foods. In particular, the activation of allergen-specific helper T cells towards a type 2 (Th2) phenotype during the first encounters with the allergen, also known as the sensitization phase, is the leading cause of the subsequent development of allergic disease. Infants and children are especially prone to developing Th2 cell responses after initial contact with allergens. But in addition, the rates of allergic sensitization and the development of allergic diseases among children are increasing in the industrialized world and have been associated with living in urban settings. Particularly for respiratory allergies, greater susceptibility to developing allergic Th2 cell responses has been shown in children living in urban environments containing low levels of microbial contaminants, principally bacterial endotoxins [lipopolysaccharide (LPS)], in the causative aeroallergens. This review highlights the current understanding of the factors that balance Th2 cell immunity to environmental allergens, with a particular focus on the determinants that program conventional dendritic cells (cDCs) toward or away from a Th2 stimulatory function. In this context, it discusses transcription factor-guided functional specialization of type-2 cDCs (cDC2s) and how the integration of signals derived from the environment drives this process. In addition, it analyzes observational and mechanistic studies supporting an essential role for innate sensing of microbial-derived products contained in aeroallergens in modulating allergic Th2 cell immune responses. Finally, this review examines whether hyporesponsiveness to microbial stimulation, particularly to LPS, is a risk factor for the induction of Th2 cell responses and allergic sensitization during infancy and early childhood and the potential factors that may affect early-age response to LPS and other environmental microbial components.
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Affiliation(s)
- Beatriz León
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, United States
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10
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Choi A, Jung YW, Choi H. The extrinsic factors important to the homeostasis of allergen-specific memory CD4 T cells. Front Immunol 2022; 13:1080855. [PMID: 36591273 PMCID: PMC9798121 DOI: 10.3389/fimmu.2022.1080855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 11/30/2022] [Indexed: 12/23/2022] Open
Abstract
Memory T cells, which are generated after the primary immune response to cognate antigens, possess unique features compared to naïve or effector T cells. These memory T cells are maintained for a long period of time and robustly reactivate in lymphoid or peripheral tissues where they re-encounter antigens. Environments surrounding memory T cells are importantly involved in the process of the maintenance and reactivation of these T cells. Although memory T cells are generally believed to be formed in response to acute infections, the pathogenesis and persistence of chronic inflammatory diseases, including allergic diseases, are also related to the effector functions of memory CD4 T cells. Thus, the factors involved in the homeostasis of allergen-specific memory CD4 T cells need to be understood to surmount these diseases. Here, we review the characteristics of allergen-specific memory CD4 T cells in allergic diseases and the importance of extrinsic factors for the homeostasis and reactivation of these T cells in the view of mediating persistence, recurrence, and aggravation of allergic diseases. Overall, this review provides a better understanding of memory CD4 T cells to devise effective therapeutic strategies for refractory chronic inflammatory diseases.
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Affiliation(s)
| | - Yong Woo Jung
- Department of Pharmacy, Korea University, Sejong-si, Republic of Korea
| | - Hanbyeul Choi
- Department of Pharmacy, Korea University, Sejong-si, Republic of Korea
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11
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West AL, von Gerichten J, Irvine NA, Miles EA, Lillycrop KA, Calder PC, Fielding BA, Burdge GC. Fatty acid composition and metabolic partitioning of α-linolenic acid are contingent on life stage in human CD3 + T lymphocytes. Front Immunol 2022; 13:1079642. [PMID: 36582247 PMCID: PMC9792684 DOI: 10.3389/fimmu.2022.1079642] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 11/23/2022] [Indexed: 12/15/2022] Open
Abstract
Introduction Immune function changes across the life course; the fetal immune system is characterised by tolerance while that of seniors is less able to respond effectively to antigens and is more pro-inflammatory than in younger adults. Lipids are involved centrally in immune function but there is limited information about how T cell lipid metabolism changes during the life course. Methods and Results We investigated whether life stage alters fatty acid composition, lipid droplet content and α-linolenic acid (18:3ω-3) metabolism in human fetal CD3+ T lymphocytes and in CD3+ T lymphocytes from adults (median 41 years) and seniors (median 70 years). Quiescent fetal T cells had higher saturated (SFA), monounsaturated fatty acid (MUFA), and ω-6 polyunsaturated fatty acid (PUFA) contents than adults or seniors. Activation-induced changes in fatty acid composition differed between life stages. The principal metabolic fates of [13C]18:3ω-3 were constitutive hydroxyoctadecatrienoic acid synthesis and β-oxidation and carbon recycling into SFA and MUFA. These processes declined progressively across the life course. Longer chain ω-3 PUFA synthesis was a relatively minor metabolic fate of 18:3ω-3 at all life stages. Fetal and adult T lymphocytes had similar lipid droplet contents, which were lower than in T cells from seniors. Variation in the lipid droplet content of adult T cells accounted for 62% of the variation in mitogen-induced CD69 expression, but there was no significant relationship in fetal cells or lymphocytes from seniors. Discussion Together these findings show that fatty acid metabolism in human T lymphocytes changes across the life course in a manner that may facilitate the adaptation of immune function to different life stages.
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Affiliation(s)
- Annette L. West
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, Hampshire, United Kingdom
| | - Johanna von Gerichten
- Department of Nutritional Sciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, United Kingdom
| | - Nicola A. Irvine
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, Hampshire, United Kingdom
| | - Elizabeth A. Miles
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, Hampshire, United Kingdom
| | - Karen A. Lillycrop
- Centre for Biological Sciences, Faculty of Natural and Environmental Sciences, University of Southampton, Southampton, Hampshire, United Kingdom
| | - Philip C. Calder
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, Hampshire, United Kingdom,National Institute for Health and Care Research (NIHR) Southampton Biomedical Research Centre, University Hospital Southampton National Health Service (NHS) Foundation Trust and University of Southampton, Southampton, Hampshire, United Kingdom
| | - Barbara A. Fielding
- Department of Nutritional Sciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, United Kingdom
| | - Graham C. Burdge
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, Hampshire, United Kingdom,*Correspondence: Graham C. Burdge,
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12
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Perkin MR, Strachan DP. The hygiene hypothesis for allergy - conception and evolution. FRONTIERS IN ALLERGY 2022; 3:1051368. [PMID: 36506644 PMCID: PMC9731379 DOI: 10.3389/falgy.2022.1051368] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 10/20/2022] [Indexed: 11/25/2022] Open
Abstract
In 1989, a short paper entitled "Hay fever, hygiene and household size" observed that British children from larger families were less likely to develop hay fever and suggested that this could be because early exposure to infection prevents allergy. This sibship size association for hay fever, since replicated many times in Britain and other affluent countries and confirmed by objective measures of atopy, prompted what has come to be known as the "hygiene hypothesis for allergy", although that term was not specifically used in the 1989 paper. The present paper reviews the historical roots of the "hygiene hypothesis" and charts its development over more than 30 years. Initial scepticism among immunologists turned to enthusiasm in the mid-1990s as the Th1/Th2 paradigm for allergic sensitisation emerged from animal experiments and the concept of "immunological old friends" became popular from the early 2000s. From the late 1990s, observations of reduced allergy risk among children of anthroposophic families and those brought up on farms suggested that the sibship size effects formed part of a broader range of "hygiene-related" determinants of allergy. Children from large families with farming exposure have approximately sixfold reduction in prevalence of hay fever, indicating the potential strength and epidemiological importance of these environmental determinants. During the 21st century, a wide range of specific microbial, environmental and lifestyle factors have been investigated as possible underlying mechanisms, but sadly none have emerged as robust explanations for the family size and farming effects. Thus, while the "hygiene hypothesis" led to a fundamental reappraisal of our relationship with our microbial environment and to the concept that early exposure, rather than avoidance, is beneficial for developing a healthy immune system, the underlying mechanism for variations in allergy prevalence with family size remains, in Churchillian terms, "a riddle wrapped in a mystery inside an enigma".
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13
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KIM DC, CHOI YW, LEE ES, CHOI JW. No Association Between First Exposure to General Anaesthesia and Atopic Dermatitis in the Paediatric Population. Acta Derm Venereol 2022; 102:adv00813. [PMID: 36317588 PMCID: PMC9811282 DOI: 10.2340/actadv.v102.2738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
General anaesthesia could affect various immune responses, including Th1 and Th2 immunity, which might also affect cells that play an important role in the pathogenesis of atopic dermatitis. However, the relationship between general anaesthesia exposure and atopic dermatitis remains unknown. The aim of this study was to investigate the risk of developing atopic dermatitis after first exposure to general anaesthesia in the paediatric population (18 years or under). A retrospective cohort study, including those exposed (n = 7,681) and unexposed (n = 38,405; control participants) to general anaesthesia (1:5 ratio), was conducted using national sample cohort data from 2002 to 2015. All participants were followed up for 2 years after cohort entry. The 2-year cumulative incidences of atopic dermatitis in the exposed and unexposed groups were 2.3% and 2.2%, respectively. In the subgroup analysis by age, the cumulative incidence was not significantly different between these cohorts. The risks of atopic dermatitis were not significant in the exposed group in the univariate model (hazard ratio 1.05; confidence interval 0.88-1.24) and in the multivariate model, wherein all covariates were adjusted (adjusted hazard ratio, 1.03; 95% confidence interval 0.87-1.23). The results suggest that children's exposure to general anaesthesia was not associated with increased or decreased risk of atopic dermatitis.
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Affiliation(s)
- Dong Chan KIM
- Department of Dermatology, Ajou University School of Medicine, Suwon
| | - Young Woong CHOI
- Department of Anesthesia, Korea Cancer Center Hospital, Seoul, Korea
| | - Eun-So LEE
- Department of Dermatology, Ajou University School of Medicine, Suwon
| | - Jee Woong CHOI
- Department of Dermatology, Ajou University School of Medicine, Suwon
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14
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The Impact of Short-Chain Fatty Acids on Neonatal Regulatory T Cells. Nutrients 2022; 14:nu14183670. [PMID: 36145046 PMCID: PMC9503436 DOI: 10.3390/nu14183670] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/02/2022] [Accepted: 09/04/2022] [Indexed: 11/16/2022] Open
Abstract
Over the first weeks of life, the neonatal gastrointestinal tract is rapidly colonised by a diverse range of microbial species that come to form the ‘gut microbiota’. Microbial colonisation of the neonatal gut is a well-established regulator of several physiological processes that contribute to immunological protection in postnatal life, including the development of the intestinal mucosa and adaptive immunity. However, the specific microbiota-derived signals that mediate these processes have not yet been fully characterised. Accumulating evidence suggests short-chain fatty acids (SCFAs), end-products of intestinal bacterial metabolism, as one of the key mediators of immune development in early life. Critical to neonatal health is the development of regulatory T (Treg) cells that promote and maintain immunological tolerance against self and innocuous antigens. Several studies have shown that SCFAs can induce the differentiation and expansion of Tregs but also mediate pathological effects in abnormal amounts. However, the exact mechanisms through which SCFAs regulate Treg development and pathologies in early life remain poorly defined. In this review, we summarise the current knowledge surrounding SCFAs and their potential impact on the neonatal immune system with a particular focus on Tregs, and the possible mechanisms through which SCFAs achieve their immune modulatory effect.
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15
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Kloepfer KM, McCauley KE, Kirjavainen PV. The Microbiome as a Gateway to Prevention of Allergic Disease Development. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY: IN PRACTICE 2022; 10:2195-2204. [PMID: 35718258 DOI: 10.1016/j.jaip.2022.05.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/25/2022] [Accepted: 05/28/2022] [Indexed: 12/18/2022]
Abstract
Allergic diseases exclusively affect tissues that face environmental challenges and harbor endogenous bacterial microbiota. The microbes inhabiting the affected tissues may not be mere bystanders in this process but actively affect the risk of allergic sensitization, disease development, and exacerbation or abatement of symptoms. Experimental evidence provides several plausible means by which the human microbiota could influence the development of allergic diseases including, but not limited to, effects on antigen presentation and induction of tolerance and allergen permeation by endorsing or disrupting epithelial barrier integrity. Epidemiological evidence attests to the significance of age-appropriate, nonpathogenic microbiota development in skin, gastrointestinal tract, and airways for protection against allergic disease development. Thus, there exist potential targets for preventive actions either in the prenatal or postnatal period. These could include maternal dietary interventions, antibiotic stewardship for both the mother and infant, reducing elective cesarean deliveries, and understanding barriers to breastfeeding and timing of food diversification. In here, we will review the current understanding and evidence of allergy-associated human microbiota patterns, their role in the development of allergic diseases, and how we could harness these associations to our benefit against allergies.
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16
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Hu Y, Zhu Q, Wang Y, Liao C, Jiang G. A short review of human exposure to antibiotics based on urinary biomonitoring. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 830:154775. [PMID: 35339554 DOI: 10.1016/j.scitotenv.2022.154775] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/09/2022] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
Antibiotics play a role in preventing and treating infectious diseases and also contribute to other health risks for humans. With the overuse of antibiotics, they are widely distributed in the environment. Long-term exposure to multiple antibiotics may occur in humans through medication and dietary intake. Therefore, it is critical to estimate daily intake and health risk of antibiotics based on urinary biomonitoring. This review compares the strengths and weaknesses of current analytical methods to determine antibiotics in urine samples, discusses the urinary concentration profiles and hazard quotients of individual antibiotics, and overviews correlations of antibiotic exposure with the risk of diseases. Liquid chromatography-tandem mass spectrometry is most applied to simultaneously determine multiple types of antibiotics at trace levels. Solid-phase extraction with a hydrophilic-lipophilic balance adsorbent is commonly used to extract antibiotics in urine samples. Fifteen major antibiotics with relatively higher detection frequencies and concentrations include sulfaclozine, trimethoprim, erythromycin, azithromycin, penicillin V, amoxicillin, oxytetracycline, chlortetracycline, tetracycline, doxycycline, ofloxacin, enrofloxacin, ciprofloxacin, norfloxacin, and florfenicol. Humans can be easily at microbiological effect-based risk induced by florfenicol, ciprofloxacin, azithromycin, and amoxicillin. Positive associations were observed between specific antibiotic exposure and obesity, allergic diseases, and mental disorders. Overall, the accessible, automated, and environmentally friendly methods are prospected for simultaneous determinations of antibiotics at trace level in urine. To estimate human exposure to antibiotics more accurately, knowledge gaps need to be filled up, including the transformation between parent and metabolic antibiotics, urinary excretion proportions of antibiotics at low-dose exposure and pharmacokinetic data of antibiotics in humans, and the repeated sampling over a long period in future research is needed. Longitudinal studies about antibiotic exposure and the risk of diseases in different developmental windows as well as in-depth research on the pathogenic mechanism of long-term, low-dose, and joint antibiotic exposure are warranted.
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Affiliation(s)
- Yu Hu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qingqing Zhu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yawei Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, Zhejiang 310024, China; Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, School of Environment and Health, Jianghan University, Wuhan, Hubei 430056, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chunyang Liao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, Zhejiang 310024, China; Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, School of Environment and Health, Jianghan University, Wuhan, Hubei 430056, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, Zhejiang 310024, China; Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, School of Environment and Health, Jianghan University, Wuhan, Hubei 430056, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
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17
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Kishida S, Kato-Mori Y, Okamoto M, Hagiwara K. Anti-inflammatory effect a specific Lactiplantibacillus plantarum in an ovalbumin-induced asthma model. Microbiol Immunol 2022; 66:442-452. [PMID: 35674213 DOI: 10.1111/1348-0421.13014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 05/13/2022] [Accepted: 06/02/2022] [Indexed: 11/29/2022]
Abstract
Autoimmune, allergic, and respiratory inflammatory diseases are some of the most important health issues worldwide. Disorders of the gut microbiota have been associated with the induction of allergic and inflammatory diseases, and probiotics are being tested for disease prevention. We examined functional Lactiplantibacillus plantarum RGU (Lp-1) to mice with ovalbumin (OVA)-induced asthma model to elucidate the inhibitory effect on pathological progression in asthma model. Prior to the experiments, the intestinal lactic acid bacteria were reduced by administering multiple antibiotics (MAB) to evaluate the administration effect of lactic acid bacteria. Mice were administered with Lp-1 or comparative control lactic acid bacteria in each group. After that, OVA-induced asthma was induced, and cytokine gene expression and histological findings were compared. Exacerbation of lung lesions was confirmed in the MAB group. The Lp-1 group mice had alleviated lung lesions with a decrease in IL-1β, IL-13, IL-17 and an increase in IL-10 of the splenocytes and bronchial lymph nodes compared with the MAB group, but not in the other groups. In OVA-induced asthma, administration of specific Lactiplantibacillus was confirmed to induce anti-inflammatory cytokines.
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Affiliation(s)
- Shigefumi Kishida
- Department of Pathobiology, Graduate School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
| | - Yuko Kato-Mori
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Minoru Okamoto
- Department of Pathobiology, Graduate School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
| | - Katsuro Hagiwara
- Department of Pathobiology, Graduate School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
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18
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Olin A, Acevedo N, Lakshmikanth T, Chen Y, Johansson C, Alm J, Scheynius A, Brodin P. Longitudinal analyses of development of the immune system during the first five years of life in relation to lifestyle. Allergy 2022; 77:1583-1595. [PMID: 35094423 DOI: 10.1111/all.15232] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 11/24/2021] [Accepted: 12/22/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND Changes in immune cell composition during the immunological window within the first years after birth are not fully understood, especially the effect that different lifestyles might have on immune cell functionality. METHODS Peripheral blood mononuclear cells from mothers and their children at birth and at two anvd five years were analyzed by mass cytometry. Immune cell composition and functionality was analyzed according to family lifestyle (anthroposophic and non-anthroposophic). RESULTS We found no significant differences in the proportions of major immune lineages between anthroposophic and non-anthroposophic children at each time point, but there were clear changes over time in the proportions of mononuclear leukocytes, especially in B-cells and T lymphocytes. Phenotypic distances between cord blood and maternal blood were high at birth but decreased sharply the first two years, indicating strong phenotypic convergence with maternal cells. We found that children exhibited similar stimulation responses at birth, but subsequently segregated into two discrete functional trajectories. Trajectory 1 was associated with a decrease in tumor necrosis factor alpha (TNFa) production by CD4+ T- and NK-cells, while Trajectory 2 depicted an increase in the production of IL-2 and interferon gamma (INFg) by T-cells. In both trajectories, there was an increase in IL-17A production by T-cells resulting in prominent differences at five years of age. CONCLUSIONS This exploratory study suggests that leukocyte frequencies and cell phenotypes change with age in the same way across all children, while functional development follows one of two discrete trajectories that largely segregate by family lifestyle, supporting the hypothesis that early environmental exposures imprint immune cell function which may contribute to IgE sensitization. Our results also support that the first two years are critical for the environmental exposures to imprint the immune cells. Further studies with larger sample sizes are required to validate our findings.
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Affiliation(s)
- Axel Olin
- Science for Life Laboratory Department of Women’s and Children's Health Karolinska Institutet Stockholm Sweden
| | - Nathalie Acevedo
- Department of Clinical Science and Education Karolinska Institutet Stockholm Sweden
- Sachs' Children and Youth Hospital Södersjukhuset Stockholm Sweden
- Institute for Immunological Research University of Cartagena Cartagena Colombia
| | - Tadepally Lakshmikanth
- Science for Life Laboratory Department of Women’s and Children's Health Karolinska Institutet Stockholm Sweden
| | - Yang Chen
- Science for Life Laboratory Department of Women’s and Children's Health Karolinska Institutet Stockholm Sweden
| | - Catharina Johansson
- Department of Clinical Science and Education Karolinska Institutet Stockholm Sweden
- Sachs' Children and Youth Hospital Södersjukhuset Stockholm Sweden
| | - Johan Alm
- Department of Clinical Science and Education Karolinska Institutet Stockholm Sweden
- Sachs' Children and Youth Hospital Södersjukhuset Stockholm Sweden
| | - Annika Scheynius
- Department of Clinical Science and Education Karolinska Institutet Stockholm Sweden
- Sachs' Children and Youth Hospital Södersjukhuset Stockholm Sweden
- Science for Life Laboratory Karolinska Institutet Stockholm Sweden
| | - Petter Brodin
- Science for Life Laboratory Department of Women’s and Children's Health Karolinska Institutet Stockholm Sweden
- Department of Newborn Medicine Karolinska University Hospital Stockholm Sweden
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Mohamad Zainal NH, Mohd Nor NH, Saat A, Clifton VL. Childhood allergy susceptibility: The role of the immune system development in the in-utero period. Hum Immunol 2022; 83:437-446. [DOI: 10.1016/j.humimm.2022.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 01/20/2022] [Accepted: 02/07/2022] [Indexed: 11/30/2022]
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20
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Fang H, Ma Z, Chen L, Xian R, Wang J, Chen J, Li H, Hu Y. Trends in the contributions of atopic family history to pediatric food sensitization and allergy. Front Pediatr 2022; 10:967930. [PMID: 36568419 PMCID: PMC9768553 DOI: 10.3389/fped.2022.967930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 11/08/2022] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE Family history of atopic diseases (FHA) contributes to food allergy (FA). But little is known whether FHA primarily increases IgE-mediated, non-IgE-mediated FA, or both. And the trends in the contributions of FHA to food sensitization (FS) and FA remain unclear. We aim to clarify the associations among FHA, FS and FA and to understand the trends in the contributions of FHA to FS and FA. METHODS We used chi-square test and mediating effect model to analyze the associations among FHA, FS and FA through comparisons between two cross-sectional investigations on FA in children under 2 years old in 2009 and 2019. RESULTS In 2009 and 2019, the positive FHA proportion tended to be increasing without significance (28.9% to 31.6%, P = 0.39). Subgroup analysis showed the FS rate in FA group decreased significantly (37/39 to 44/62, P = 0.003). In 2009, the FS rate and FA prevalence were higher in FHA (+) group than in FHA (-) group (26% vs. 14.7%, P = 0.008 and 15% vs. 7.7%, P = 0.03), and FS had a complete mediating effect on the association between FHA and FA (Z = 2.54, P = 0.011), but the results lost significance in 2019. CONCLUSIONS The association between FHA and FA was completely mediated by FS, which means FHA mainly increases IgE-mediated FA. And the contributions of FHA to FS and FA tended to be stabilized or even diminished, which means FHA alone could no longer be enough to screen high-risk children.
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Affiliation(s)
- Heping Fang
- Department of Child Health Care, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Child Health and Nutrition, Chongqing, China
| | - Zhuoying Ma
- Department of Child Health Care, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Child Health and Nutrition, Chongqing, China
| | - Lin Chen
- Department of Child Health Care, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Child Health and Nutrition, Chongqing, China
| | - Ruoling Xian
- Department of Child Health Care, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Child Health and Nutrition, Chongqing, China
| | - Juan Wang
- Department of Child Health Care, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Child Health and Nutrition, Chongqing, China
| | - Jing Chen
- Department of Child Health Care, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Child Health and Nutrition, Chongqing, China
| | - Haiqi Li
- Department of Child Health Care, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Child Health and Nutrition, Chongqing, China
| | - Yan Hu
- Department of Child Health Care, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Child Health and Nutrition, Chongqing, China
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Taylor M, Pillaye J, Horsnell WGC. Inherent maternal type 2 immunity: Consequences for maternal and offspring health. Semin Immunol 2021; 53:101527. [PMID: 34838445 DOI: 10.1016/j.smim.2021.101527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/10/2021] [Accepted: 11/10/2021] [Indexed: 02/08/2023]
Abstract
An inherent elevation in type 2 immunity is a feature of maternal and offspring immune systems. This has diverse implications for maternal and offspring biology including influencing success of pregnancy, offspring immune development and maternal and offspring ability to control infection and diseases such as allergies. In this review we provide a broad insight into how this immunological feature of pregnancy and early life impacts both maternal and offspring biology. We also suggest how understanding of this axis of immune influence is and may be utilised to improve maternal and offspring health.
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Affiliation(s)
- Matthew Taylor
- Institute of Immunology and Infection Research, Ashworth Laboratories, The Kings Buildings, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JT, UK.
| | - Jamie Pillaye
- Institute of Microbiology and Infection, University of Birmingham, Birmingham, UK
| | - William Gordon Charles Horsnell
- Institute of Microbiology and Infection, University of Birmingham, Birmingham, UK; Wellcome Centre for Infectious Diseases Research in Africa (CIDRI-Africa), Institute of Infectious Disease and Molecular Medicine (IDM), Department of Pathology, Division of Immunology, Faculty of Health Science, University of Cape Town, Cape Town, 7925, South Africa.
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22
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von Gerichten J, West AL, Irvine NA, Miles EA, Calder PC, Lillycrop KA, Fielding BA, Burdge GC. The Partitioning of Newly Assimilated Linoleic and α-Linolenic Acids Between Synthesis of Longer-Chain Polyunsaturated Fatty Acids and Hydroxyoctadecaenoic Acids Is a Putative Branch Point in T-Cell Essential Fatty Acid Metabolism. Front Immunol 2021; 12:740749. [PMID: 34675928 PMCID: PMC8523940 DOI: 10.3389/fimmu.2021.740749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 09/08/2021] [Indexed: 12/28/2022] Open
Abstract
Longer-chain polyunsaturated fatty acids (LCPUFAs) ≥20 carbons long are required for leukocyte function. These can be obtained from the diet, but there is some evidence that leukocytes can convert essential fatty acids (EFAs) into LCPUFAs. We used stable isotope tracers to investigate LCPUFA biosynthesis and the effect of different EFA substrate ratios in human T lymphocytes. CD3+ T cells were incubated for up to 48 h with or without concanavalin A in media containing a 18:2n-6:18:3n-3 (EFA) ratio of either 5:1 or 8:1 and [13C]18:3n-3 plus [d5]18:2n-6. Mitogen stimulation increased the amounts of 16:1n-7, 18:1n-9, 18:2n-6, 20:3n-6, 20:4n-6, 18:3n-3, and 20:5n-3 in T cells. Expression of the activation marker CD69 preceded increased FADS2 and FADS1 mRNA expression and increased amounts of [d5]20:2n-6 and [13C]20:3n-3 at 48 h. In addition, 22-carbon n-6 or n-3 LCPUFA synthesis was not detected, consistent with the absence of ELOVL2 expression. An EFA ratio of 8:1 reduced 18:3n-3 conversion and enhanced 20:2n-6 synthesis compared to a 5:1 ratio. Here, [d5]9- and [d5]-13-hydroxyoctadecadienoic (HODE) and [13C]9- and [13C]13-hydroxyoctadecatrienoic acids (HOTrE) were the major labelled oxylipins in culture supernatants; labelled oxylipins ≥20 carbons were not detected. An EFA ratio of 8:1 suppressed 9- and 13-HOTrE synthesis, but there was no significant effect on 9- and 13-HODE synthesis. These findings suggest that partitioning of newly assimilated EFA between LCPUFA synthesis and hydroxyoctadecaenoic acid may be a metabolic branch point in T-cell EFA metabolism that has implications for understanding the effects of dietary fats on T lymphocyte function.
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Affiliation(s)
- Johanna von Gerichten
- Department of Nutritional Sciences, Faculty of Health and Medical Sciences, University of Surrey, Surrey, United Kingdom
| | - Annette L West
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Nicola A Irvine
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Elizabeth A Miles
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Philip C Calder
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, United Kingdom.,National Institute of Health Research (NIHR) Southampton Biomedical Research Centre, University Hospital Southampton National Health Service (NHS) Foundation Trust and University of Southampton, Southampton, United Kingdom
| | - Karen A Lillycrop
- Centre for Biological Sciences, Faculty of Natural and Environmental Sciences, University of Southampton, Southampton, United Kingdom
| | - Barbara A Fielding
- Department of Nutritional Sciences, Faculty of Health and Medical Sciences, University of Surrey, Surrey, United Kingdom
| | - Graham C Burdge
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
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23
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Fanfaret IS, Boda D, Ion LM, Hosseyni D, Leru P, Ali S, Corcea S, Bumbacea R. Probiotics and prebiotics in atopic dermatitis: Pros and cons (Review). Exp Ther Med 2021; 22:1376. [PMID: 34650624 PMCID: PMC8506923 DOI: 10.3892/etm.2021.10811] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 08/16/2021] [Indexed: 12/17/2022] Open
Abstract
Atopic dermatitis (AD) represents a chronic inflammatory skin condition in which the skin barrier is impaired; thus, the permeability is increased. Hence, there is a greater risk of allergic sensitization, as well as a higher pH and lower protection against resident microbes. Since this condition is currently increasing among children, it requires further study, as little is known regarding the pathogenesis that makes the skin prone to chronic relapsing inflammation. Trying to standardize the data regarding the use of prebiotics and probiotics in AD, we encountered tremendous variability in the literature data. Literature abounds in conflicting data: studies regarding prophylactic and therapeutic applications, different types of strains and dosages, applications in young children up to 5 years of age and above, usage of probiotics alone, prebiotics alone or synbiotics combined. There are also conflicting data regarding the outcome of these studies; some confirming a positive effect of prebiotics, probiotics or synbiotics and some showing no efficacy at all. The articles were divided into those assessing probiotics or prebiotics alone and a combination of the two, with studies showing a positive effect and studies proving no efficacy at all. We tried to critically analyze those articles showing weak and strong points. In summary, the most studied probiotics were the strains of Lactobacilli and Bifidobacteria. The Severity Scoring of Atopic Dermatitis (SCORAD) index was used to measure the efficacy of the treatment. Most studies compared their results with a placebo group and the efficacy when seen in moderate to severe forms of AD in patients with other allergic diseases present. However, the results are difficult to interpret, as in many studies the authors suggest that the disease may have a tendency to improve in time in some groups of patients.
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Affiliation(s)
| | - Daniel Boda
- Dermatology Department, 'Carol Davila' University of Medicine and Pharmacy, 050474 Bucharest, Romania.,Pediatrics Department, 'Ponderas' Academic Hospital, 014142 Bucharest, Romania
| | - Laura Mihaela Ion
- Pediatrics Department, 'Ponderas' Academic Hospital, 014142 Bucharest, Romania
| | - Daniela Hosseyni
- Public Health Department, Harvard T.H. Chan School of Public Health, ECPE, PPCR Program, Boston, MA 02115, USA
| | - Poliana Leru
- Internal Medicine, 'Carol Davila' University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Selda Ali
- Allergy Department, 'Carol Davila' University of Medicine and Pharmacy, 050474 Bucharest, Romania.,Allergy Department, 'Dr. Carol Davila' Clinical Nephrology Hospital, 010731 Bucharest, Romania
| | - Sabina Corcea
- Allergy Department, 'Carol Davila' University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Roxana Bumbacea
- Allergy Department, 'Carol Davila' University of Medicine and Pharmacy, 050474 Bucharest, Romania.,Allergy Department, 'Dr. Carol Davila' Clinical Nephrology Hospital, 010731 Bucharest, Romania
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24
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Prescott SL. A world of inflammation: the need for ecological solutions that co-benefit people, place and planet. Vet Dermatol 2021; 32:539-e149. [PMID: 34415086 DOI: 10.1111/vde.13013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 05/11/2021] [Accepted: 06/02/2021] [Indexed: 12/17/2022]
Abstract
The ecology of the early environment - including microbial diversity, nutrition, nature, social interactions and the totality of exposures in the wider "exposome" - have life-long implications for all aspects of health and resilience. In particular, the emergence of "microbiome science" provides new evidence for vital relationships between biodiversity and health at every level. New perspectives of ecological interdependence connect personal and planetary health; the human health crisis cannot be separated from the social, political and economic "ecosystems" otherwise driving dysbiosis (from its etymological root, "life in distress") at every level. Adverse changes in macroscale ecology - of food systems, lifestyle behaviours, socioeconomic disadvantage and environmental degradation - all impact the microbial systems sitting at the foundations of all ecosystems. In particular, changes in the function and composition of the human-associated microbiome have been implicated in the mounting global burden of noncommunicable diseases (NCDs), exacerbating inflammation and metabolic dysregulation through multiple pathways across the lifespan. This "dysbiotic drift" (adverse shifts in ecology at all scales) underscores the need for ecological approaches aimed at restoring symbiosis, balance and mutualism. While there is promise with supplement-based strategies (e.g. probiotics, prebiotics), it is essential to focus on upstream factors implicated in dysbiosis, including the health of wider environments, lifestyle, nature relatedness, and the social policies and practices which can facilitate or inhibit dysbiotic drift. This also calls for ambitious integrative approaches which not only define these interconnections, but also capitalize on them to create novel, collaborative and mutualistic solutions to our vast interdependent global challenges.
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Affiliation(s)
- Susan L Prescott
- The ORIGINS Project, Telethon Kids Institute, Perth Children's Hospital, University of Western Australia, Nedlands, WA, 6009, Australia.,InVIVO Planetary Health of the Worldwide Universities Network (WUN), West New York, NJ, 10704, USA.,The NOVA Institute, 1407 Fleet Street, Baltimore, MD, 21231, USA.,Center for Integrative Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
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25
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Thysen AH, Waage J, Larsen JM, Rasmussen MA, Stokholm J, Chawes B, Fink NR, Pedersen TM, Wolsk H, Thorsteinsdottir S, Litman T, Renz H, Bønnelykke K, Bisgaard H, Brix S. Distinct immune phenotypes in infants developing asthma during childhood. Sci Transl Med 2021; 12:12/529/eaaw0258. [PMID: 32024797 DOI: 10.1126/scitranslmed.aaw0258] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 08/22/2019] [Accepted: 01/10/2020] [Indexed: 12/16/2022]
Abstract
Early exposure to environmental triggers may elicit trajectories to chronic inflammatory disease through deregulated immune responses. To address relations between early immune competence and development of childhood asthma, we performed functional immune profiling of 186 parameters in blood of 541 18-month-old infants and examined links between their response phenotype and development of transient or persistent disease at 6 years of age. An abnormal neutrophil-linked antiviral response was associated with increased risk of transient asthma. Children who exhibited persistent asthma at year 6 showed enhanced interleukin-5 (IL-5) and IL-13 production in stimulated T cells at 18 months of age, which was associated with early life bacterial colonization of the airways. These findings highlight the early appearance of distinct immune characteristics in infants developing different asthma endotypes during childhood.
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Affiliation(s)
- Anna Hammerich Thysen
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark.,Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Johannes Waage
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Jeppe Madura Larsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Morten Arendt Rasmussen
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark.,Department of Food Science, Faculty of Science, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Jakob Stokholm
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Bo Chawes
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Nadia Rahman Fink
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Tine Marie Pedersen
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Helene Wolsk
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Sunna Thorsteinsdottir
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Thomas Litman
- Explorative Biology, LEO Pharma, DK-2750 Ballerup, Denmark
| | - Harald Renz
- Institute of Laboratory Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Philipps Universität Marburg, German Center for Lung Research (DZL), 35043 Marburg, Germany
| | - Klaus Bønnelykke
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Hans Bisgaard
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark.
| | - Susanne Brix
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
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26
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Chen JC, Chan CC, Ting NC, Kuo ML. Allergen Exposure in Murine Neonates Promoted the Development of Asthmatic Lungs. Biomedicines 2021; 9:688. [PMID: 34207237 PMCID: PMC8235458 DOI: 10.3390/biomedicines9060688] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 06/15/2021] [Accepted: 06/16/2021] [Indexed: 01/10/2023] Open
Abstract
We previously demonstrated that fetal allergen exposure caused T-helper 2 (Th2) cell sensitization. Although neonates are immunologically more mature than fetuses, asthmatic lungs were reportedly mitigated by neonatal allergen administration, mechanically referring to regulatory T-cells and TGF-β signaling but lacking the immunological profiles after neonatal exposure. To reappraise the immunological outcome of neonatal allergen exposure, we injected adjuvant-free ovalbumin intraperitoneally into 2-day-old BALB/c neonates, followed by aerosolized ovalbumin inhalation in adulthood. Mice were examined for the immunological profiles specifically after neonatal exposures, lung function and histology (hematoxylin-eosin or periodic acid Schiff staining), and gene expressions of intrapulmonary cytokines (IL-4, IL-5, IL-13 and IFN-γ) and chemokines (CCL17, CCL22, CCL11 and CCL24). Neonatal ovalbumin exposure triggered Th2-skewed sensitization and ovalbumin-specific IgE production. Subsequent ovalbumin inhalation in adulthood boosted Th2 immunity and caused asthmatic lungs with structural and functional alterations of airways. Gender difference mainly involved airway hyperresponsiveness and resistance with greater female susceptibility to methacholine bronchospastic stimulation. In lungs, heightened chemoattractant gene expressions were only granted to neonatally ovalbumin-sensitized mice with aerosolized ovalbumin stress in adulthood, and paralleled by upregulated Th2 cytokine genes. Thus, aeroallergen stress in atopic individuals might upregulate the expression of intrapulmonary chemoattractants to recruit Th2 cells and eosinophils into the lungs, pathogenically linked to asthma development. Conclusively, murine neonates were sensitive to allergen exposures. Exposure events during neonatal stages were crucial to asthma predisposition in later life. These findings from a murine model point to allergen avoidance in neonatal life, possibly even very early in utero, as the best prospect of primary asthma prevention.
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Affiliation(s)
- Jeng-Chang Chen
- Department of Surgery, Chang Gung Children’s Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan;
- Department of Medicine, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Cheng-Chi Chan
- Abnova Corporation, Taipei 114, Taiwan;
- Department of Microbiology and Immunology, Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Nai-Chun Ting
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan;
| | - Ming-Ling Kuo
- Department of Microbiology and Immunology, Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
- Department of Pediatrics, Division of Allergy, Asthma, and Rheumatology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
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27
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Immunomodulatory drugs suppress Th1-inducing ability of dendritic cells but enhance Th2-mediated allergic responses. Blood Adv 2021; 4:3572-3585. [PMID: 32761232 DOI: 10.1182/bloodadvances.2019001410] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 05/01/2020] [Indexed: 11/20/2022] Open
Abstract
Immunomodulatory drugs (IMiDs), lenalidomide and pomalidomide, are widely used treatments for multiple myeloma; however, they occasionally lead to episodes of itchy skin and rashes. Here, we analyzed the effects of IMiDs on human myeloid dendritic cells (mDCs) as major regulators of Th1 or Th2 responses and the role they play in allergy. We found that lenalidomide and pomalidomide used at clinical concentrations did not affect the survival or CD86 and OX40-ligand expression of blood mDCs in response to lipopolysaccharide (LPS) and thymic stromal lymphopoietin (TSLP) stimulation. Both lenalidomide and pomalidomide dose-dependently inhibited interleukin-12 (IL-12) and TNF production and STAT4 expression, and enhanced IL-10 production in response to LPS. When stimulated with TSLP, both IMiDs significantly enhanced CCL17 production and STAT6 and IRF4 expression and promoted memory Th2-cell responses. In 46 myeloma patients, serum CCL17 levels at the onset of lenalidomide-associated rash were significantly higher than those without rashes during lenalidomide treatment and those before treatment. Furthermore, serum CCL17 levels in patients who achieved a very good partial response (VGPR) were significantly higher compared with a less than VGPR during lenalidomide treatment. The median time to next treatment was significantly longer in lenalidomide-treated patients with rashes than those without. Collectively, IMiDs suppressed the Th1-inducing capacity of DCs, instead promoting a Th2 response. Thus, the lenalidomide-associated rashes might be a result of an allergic response driven by Th2-axis activation. Our findings suggest clinical efficacy and rashes as a side effect of IMiDs are inextricably linked through immunostimulation.
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28
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Post-transplant food anaphylaxis in an adult cord blood transplant recipient (Ms. No. IJHM-D-20-01037R1). Int J Hematol 2021; 114:292-296. [PMID: 33772727 DOI: 10.1007/s12185-021-03140-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 03/19/2021] [Accepted: 03/19/2021] [Indexed: 11/27/2022]
Abstract
Transplant acquired food allergy (TAFA) is a well-known complication following pediatric liver transplantation, but post-cord blood transplantation (post-CBT) TAFA has rarely been reported. Here, we describe a case of new-onset food anaphylaxis after CBT in an adult patient that demonstrates that post-CBT allergen-challenge is not a risk for long-term allergic sensitization even in adult recipients. The patient was a 39-year-old Japanese man with aggressive NK cell leukemia. He had no previous history of allergies. After receiving CBT, the patient had an unbalanced diet with high preference for bread, bananas, miso-soup, cow's milk, cheese, egg, sesame and buckwheat soba noodles, and experienced repeated diarrhea. Six months later, he developed symptoms such as vomiting, epigastric pain, diarrhea, high fever and hypotension. The condition was initially diagnosed as enterocolitis, but symptoms recurred after consumption of buckwheat. Anaphylaxis induced by buckwheat was confirmed with serum radioallergosorbent tests (RAST), showing allergen-specific IgE for buckwheat (greater than 100 U/mL, Class 6) and egg ovomucoid (Class 4). Nineteen months after a buckwheat and egg-free diet, serum RAST for buckwheat and egg significantly improved. As a result, the patient acquired a tolerance and was able to consume buckwheat and egg without allergic symptoms.
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29
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Semmes EC, Chen JL, Goswami R, Burt TD, Permar SR, Fouda GG. Understanding Early-Life Adaptive Immunity to Guide Interventions for Pediatric Health. Front Immunol 2021; 11:595297. [PMID: 33552052 PMCID: PMC7858666 DOI: 10.3389/fimmu.2020.595297] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 12/04/2020] [Indexed: 01/16/2023] Open
Abstract
Infants are capable of mounting adaptive immune responses, but their ability to develop long-lasting immunity is limited. Understanding the particularities of the neonatal adaptive immune system is therefore critical to guide the design of immune-based interventions, including vaccines, in early life. In this review, we present a thorough summary of T cell, B cell, and humoral immunity in early life and discuss infant adaptive immune responses to pathogens and vaccines. We focus on the differences between T and B cell responses in early life and adulthood, which hinder the generation of long-lasting adaptive immune responses in infancy. We discuss how knowledge of early life adaptive immunity can be applied when developing vaccine strategies for this unique period of immune development. In particular, we emphasize the use of novel vaccine adjuvants and optimization of infant vaccine schedules. We also propose integrating maternal and infant immunization strategies to ensure optimal neonatal protection through passive maternal antibody transfer while avoiding hindering infant vaccine responses. Our review highlights that the infant adaptive immune system is functionally distinct and uniquely regulated compared to later life and that these particularities should be considered when designing interventions to promote pediatric health.
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Affiliation(s)
- Eleanor C. Semmes
- Duke Human Vaccine Institute, Duke University, Durham, NC, United States
- Medical Scientist Training Program, Duke University, Durham, NC, United States
- Children’s Health and Discovery Initiative, Department of Pediatrics, Duke University, Durham, NC, United States
| | - Jui-Lin Chen
- Duke Human Vaccine Institute, Duke University, Durham, NC, United States
| | - Ria Goswami
- Duke Human Vaccine Institute, Duke University, Durham, NC, United States
| | - Trevor D. Burt
- Children’s Health and Discovery Initiative, Department of Pediatrics, Duke University, Durham, NC, United States
- Division of Neonatology, Department of Pediatrics, Duke University, Durham, NC, United States
| | - Sallie R. Permar
- Duke Human Vaccine Institute, Duke University, Durham, NC, United States
- Children’s Health and Discovery Initiative, Department of Pediatrics, Duke University, Durham, NC, United States
| | - Genevieve G. Fouda
- Duke Human Vaccine Institute, Duke University, Durham, NC, United States
- Children’s Health and Discovery Initiative, Department of Pediatrics, Duke University, Durham, NC, United States
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30
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Jain N. The early life education of the immune system: Moms, microbes and (missed) opportunities. Gut Microbes 2020; 12:1824564. [PMID: 33043833 PMCID: PMC7781677 DOI: 10.1080/19490976.2020.1824564] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/29/2020] [Accepted: 09/08/2020] [Indexed: 02/03/2023] Open
Abstract
The early life immune system is characterized by unique developmental milestones. Functionally diverse immune cells arise from distinct waves of hematopoietic stem cells, a phenomenon referred to as 'layered' immunity. This stratified development of immune cells extends to lineages of both innate and adaptive cells. The defined time window for the development of these immune cells lends itself to the influence of specific exposures typical of the early life period. The perinatal immune system develops in a relatively sterile fetal environment but emerges into one filled with a multitude of antigenic encounters. A major burden of this comes in the form of the microbiota that is being newly established at mucosal surfaces of the newborn. Accumulating evidence suggests that early life microbial exposures, including those arising in utero, can imprint long-lasting changes in the offspring's immune system and determine disease risk throughout life. In this review, I highlight unique features of early life immunity and explore the role of intestinal bacteria in educating the developing immune system.
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Affiliation(s)
- Nitya Jain
- Mucosal Immunology and Biology Research Center, Massachusetts General Hospital for Children, Charlestown, MA, USA
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31
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Immunomodulatory effect of different extracts from Angiostrongylus cantonensis on airway inflammation in an allergic asthma model. Parasitol Res 2020; 119:3719-3728. [PMID: 32955617 DOI: 10.1007/s00436-020-06884-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 09/13/2020] [Indexed: 10/23/2022]
Abstract
This study aimed to evaluate the effects of early-life exposure to different extracts of Angiostrongylus cantonensis (A. cantonensis) on airway inflammation in an allergic asthma model. The total soluble extract (TE) and the soluble extracts of the digestive (AcD), reproductive (AcR), and cuticle (AcC) systems of A. cantonensis were used for immunisation before ovalbumin (OVA)-sensitisation/challenge in an OVA-induced allergic asthma model. The initial hypothesis of the study was that some soluble extract of the systems (AcD, AcR, or AcC) could be more potent to the modulation of inflammation than the TE. Our data, however, shows that immunisation with the TE is more promising because it decreased the high influx of inflammatory cells on airways and promoted an increase of interferon-γ (IFN-ɣ) and interleukin-10 (IL-10) levels. Besides this, the immunisation with the TE also led to a reduction of goblet cells and mucus overproduction in the lung tissue of asthmatic mice. We believe that the extracts have a distinct capacity to modulate the immune system, due to the TE possessing a greater variability of molecules, which together leads to control of airway inflammation. In conclusion, this is the first study to reveal that the TE of A. cantonensis adult worms has a greater potential for developing a novel therapeutic for allergic asthma.
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32
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Zarate MA, Nguyen LM, De Dios RK, Zheng L, Wright CJ. Maturation of the Acute Hepatic TLR4/NF-κB Mediated Innate Immune Response Is p65 Dependent in Mice. Front Immunol 2020; 11:1892. [PMID: 32973783 PMCID: PMC7472845 DOI: 10.3389/fimmu.2020.01892] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 07/14/2020] [Indexed: 12/27/2022] Open
Abstract
Compared to adults, neonates are at increased risk of infection. There is a growing recognition that dynamic qualitative and quantitative differences in immunity over development contribute to these observations. The liver plays a key role as an immunologic organ, but whether its contribution to the acute innate immune response changes over lifetime is unknown. We hypothesized that the liver would activate a developmentally-regulated acute innate immune response to intraperitoneal lipopolysaccharide (LPS). We first assessed the hepatic expression and activity of the NF-κB, a key regulator of the innate immune response, at different developmental ages (p0, p3, p7, p35, and adult). Ontogeny of the NF-κB subunits (p65/p50) revealed a reduction in Rela (p65) and Nfkb1 (p105, precursor to p50) gene expression (p0) and p65 subunit protein levels (p0 and p3) vs. older ages. The acute hepatic innate immune response to LPS was associated by the degradation of the NF-κB inhibitory proteins (IκBα and IκBβ), and nuclear translocation of the NF-κB subunit p50 in all ages, whereas nuclear translocation of the NF-κB subunit p65 was only observed in the p35 and adult mouse. Consistent with these findings, we detected NF-κB subunit p65 nuclear staining exclusively in the LPS-exposed adult liver compared with p7 mouse. We next interrogated the LPS-induced hepatic expression of pro-inflammatory genes (Tnf, Icam1, Ccl3, and Traf1), and observed a gradually increase in gene expression starting from p0. Confirming our results, hepatic NF-κB subunit p65 nuclear translocation was associated with up-regulation of the Icam1 gene in the adult, and was not detected in the p7 mouse. Thus, an inflammatory challenge induces an NF-κB-mediated hepatic innate immune response activation across all developmental ages, but nuclear translocation of the NF-κB subunit p65 and associated induction of pro-inflammatory genes occurred only after the first month of life. Our results demonstrate that the LPS-induced hepatic innate immune response is developmentally regulated by the NF-κB subunit p65 in the mouse.
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Affiliation(s)
- Miguel A Zarate
- Section of Neonatology, Department of Pediatrics, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, United States
| | - Leanna M Nguyen
- Section of Neonatology, Department of Pediatrics, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, United States
| | - Robyn K De Dios
- Section of Neonatology, Department of Pediatrics, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, United States
| | - Lijun Zheng
- Section of Neonatology, Department of Pediatrics, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, United States
| | - Clyde J Wright
- Section of Neonatology, Department of Pediatrics, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, United States
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33
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Abstract
Neonatal CD4+ and CD8+ T cells have historically been characterized as immature or defective. However, recent studies prompt a reinterpretation of the functions of neonatal T cells. Rather than a population of cells always falling short of expectations set by their adult counterparts, neonatal T cells are gaining recognition as a distinct population of lymphocytes well suited for the rapidly changing environment in early life. In this review, I will highlight new evidence indicating that neonatal T cells are not inert or less potent versions of adult T cells but instead are a broadly reactive layer of T cells poised to quickly develop into regulatory or effector cells, depending on the needs of the host. In this way, neonatal T cells are well adapted to provide fast-acting immune protection against foreign pathogens, while also sustaining tolerance to self-antigens.
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Affiliation(s)
- Brian D Rudd
- Department of Microbiology and Immunology, Cornell University, Ithaca, New York 14853, USA;
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34
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Sbihi H, Boutin RCT, Cutler C, Suen M, Finlay BB, Turvey SE. Thinking bigger: How early-life environmental exposures shape the gut microbiome and influence the development of asthma and allergic disease. Allergy 2019; 74:2103-2115. [PMID: 30964945 DOI: 10.1111/all.13812] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 02/27/2019] [Accepted: 03/22/2019] [Indexed: 02/06/2023]
Abstract
Imbalance, or dysbiosis, of the gut microbiome of infants has been linked to an increased risk of asthma and allergic diseases. Most studies to date have provided a wealth of data showing correlations between early-life risk factors for disease and changes in the structure of the gut microbiome that disrupt normal immunoregulation. These studies have typically focused on one specific risk factor, such as mode of delivery or early-life antibiotic use. Such "micro-level" exposures have a considerable impact on affected individuals but not necessarily the whole population. In this review, we place these mechanisms under a larger lens that takes into account the influence of upstream "macro-level" environmental factors such as air pollution and the built environment. While these exposures likely have a smaller impact on the microbiome at an individual level, their ubiquitous nature confers them with a large influence at the population level. We focus on features of the indoor and outdoor human-made environment, their microbiomes and the research challenges inherent in integrating the built environment microbiomes with the early-life gut microbiome. We argue that an exposome perspective integrating internal and external microbiomes with macro-level environmental factors can provide a more comprehensive framework to define how environmental exposures can shape the gut microbiome and influence the development of allergic disease.
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Affiliation(s)
- Hind Sbihi
- Department of Pediatrics, British Columbia Children’s Hospital The University of British Columbia Vancouver British Columbia Canada
| | - Rozlyn CT. Boutin
- Department of Microbiology and Immunology, Michael Smith Laboratories The University of British Columbia Vancouver British Columbia Canada
| | - Chelsea Cutler
- Department of Pediatrics, British Columbia Children’s Hospital The University of British Columbia Vancouver British Columbia Canada
| | - Mandy Suen
- Department of Pediatrics, British Columbia Children’s Hospital The University of British Columbia Vancouver British Columbia Canada
| | - B. Brett Finlay
- Department of Microbiology and Immunology, Michael Smith Laboratories The University of British Columbia Vancouver British Columbia Canada
| | - Stuart E. Turvey
- Department of Pediatrics, British Columbia Children’s Hospital The University of British Columbia Vancouver British Columbia Canada
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Inagaki‐Katashiba N, Ito T, Inaba M, Azuma Y, Tanaka A, Phan V, Kibata K, Satake A, Nomura S. Statins can suppress DC-mediated Th2 responses through the repression of OX40-ligand and CCL17 expression. Eur J Immunol 2019; 49:2051-2062. [PMID: 31269241 PMCID: PMC6899642 DOI: 10.1002/eji.201847992] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 05/16/2019] [Accepted: 06/28/2019] [Indexed: 12/20/2022]
Abstract
DCs and epithelial cell-derived thymic stromal lymphopoietin (TSLP) have pivotal roles in allergic inflammation. TSLP stimulates myeloid DCs to express OX40-ligand (OX40L) and CCL17, which trigger and maintain Th2 cell responses. We have previously shown that statins, which are HMG-CoA reductase inhibitors, have the ability to suppress type I IFN production by plasmacytoid DCs. Here, we extended our previous work to examine the immunomodulatory effect of statins on allergic responses, particularly the TSLP-dependent Th2 pathway induced by myeloid DCs. We found that treatment of TSLP-stimulated DCs with either pitavastatin or simvastatin suppressed both the DC-mediated inflammatory Th2 cell differentiation and CRTH2+ CD4+ memory Th2 cell expansion and also repressed the expressions of OX40L and CCL17 by DCs. These inhibitory effects of statins were mimicked by treatment with either a geranylgeranyl-transferase inhibitor or Rho-kinase inhibitor and were counteracted by the addition of mevalonate, suggesting that statins induce geranylgeranylated Rho inactivation through a mevalonate-dependent pathway. We also found that statins inhibited the expressions of phosphorylated STA6 and NF-κB-p50 in TSLP-stimulated DCs. This study identified a specific ability of statins to control DC-mediated Th2 responses, suggesting their therapeutic potential for treating allergic diseases.
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Affiliation(s)
| | - Tomoki Ito
- First Department of Internal MedicineKansai Medical UniversityHirakataOsaka573–1191Japan
| | - Muneo Inaba
- First Department of Internal MedicineKansai Medical UniversityHirakataOsaka573–1191Japan
| | - Yoshiko Azuma
- First Department of Internal MedicineKansai Medical UniversityHirakataOsaka573–1191Japan
| | - Akihiro Tanaka
- First Department of Internal MedicineKansai Medical UniversityHirakataOsaka573–1191Japan
| | - Vien Phan
- First Department of Internal MedicineKansai Medical UniversityHirakataOsaka573–1191Japan
| | - Kayoko Kibata
- First Department of Internal MedicineKansai Medical UniversityHirakataOsaka573–1191Japan
| | - Atsushi Satake
- First Department of Internal MedicineKansai Medical UniversityHirakataOsaka573–1191Japan
| | - Shosaku Nomura
- First Department of Internal MedicineKansai Medical UniversityHirakataOsaka573–1191Japan
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Pretorius RA, Bodinier M, Prescott SL, Palmer DJ. Maternal Fiber Dietary Intakes during Pregnancy and Infant Allergic Disease. Nutrients 2019; 11:nu11081767. [PMID: 31374861 PMCID: PMC6722741 DOI: 10.3390/nu11081767] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 07/26/2019] [Accepted: 07/29/2019] [Indexed: 12/24/2022] Open
Abstract
Maternal diet during pregnancy plays a likely role in infant immune development through both direct nutrient specific immunomodulatory effects and by modulating the composition and metabolic activity of the maternal gut microbiome. Dietary fibers, as major substrates for microbial fermentation, are of interest in this context. This is the first study to examine maternal intakes of different fiber sub-types and subsequent infant allergic disease. In an observational study of 639 mother–infant pairs (all infants had a family history of allergic disease) we examined maternal intakes of total fiber, soluble fiber, insoluble fiber, resistant starch, and prebiotic fiber, by a semi-quantitative food frequency questionnaire at 36–40 weeks’ gestation. Infants attended an allergy clinical assessment at 12 months of age, including skin prick testing to common allergens. Higher maternal dietary intakes of resistant starch were associated with reduced doctor diagnosed infant wheeze, adjusted odds ratio (aOR) 0.68 (95% CI 0.49, 0.95, p = 0.02). However, in contrast, higher maternal intakes of resistant starch were associated with higher risk of parent reported eczema aOR 1.27 (95% CI 1.09, 1.49, p < 0.01) and doctor diagnosed eczema aOR 1.19 (95% CI 1.01, 1.41, p = 0.04). In conclusion, maternal resistant starch consumption was differentially associated with infant phenotypes, with reduced risk of infant wheeze, but increased risk of eczema.
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Affiliation(s)
- Rachelle A Pretorius
- School of Medicine, University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia
| | - Marie Bodinier
- INRA Pays de la Loire, UR 1268 Biopolymers Interactions Assemblies, rue de la géraudière, BP 71627, Cedex 3, 44316 Nantes, France
| | - Susan L Prescott
- School of Medicine, University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia
- Telethon Kids Institute, University of Western Australia, 15 Hospital Ave, Nedlands 6009, Western Australia, Australia
| | - Debra J Palmer
- School of Medicine, University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia.
- Telethon Kids Institute, University of Western Australia, 15 Hospital Ave, Nedlands 6009, Western Australia, Australia.
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Abstract
Immunological memory is one of the core topics of contemporary immunology. Yet there are many discussions about what this concept precisely means, which components of the immune system display it, and in which phyla it exists. Recent years have seen the multiplication of claims that immunological memory can be found in "innate" immune cells and in many phyla beyond vertebrates (including invertebrates, plants, but also bacteria and archaea), as well as the multiplication of concepts to account for these phenomena, such as "innate immune memory" or "trained immunity". The aim of this critical review is to analyze these recent claims and concepts, and to distinguish ideas that have often been misleadingly associated, such as memory, adaptive immunity, and specificity. We argue that immunological memory is a gradual and multidimensional phenomenon, irreducible to any simple dichotomy, and we show why adopting this new view matters from an experimental and therapeutic point of view.
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Affiliation(s)
- Thomas Pradeu
- ImmunoConcept, CNRS & University of Bordeaux, Bordeaux, France
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El-Heis S, Crozier SR, Healy E, Robinson SM, Harvey NC, Cooper C, Inskip HM, Baird J, Godfrey KM. Faltering of prenatal growth precedes the development of atopic eczema in infancy: cohort study. Clin Epidemiol 2018; 10:1851-1864. [PMID: 30588116 PMCID: PMC6296686 DOI: 10.2147/clep.s175878] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Infants with atopic eczema have an increased risk of impaired growth, but the origin of this impairment is unclear. The aim of this study was to examine fetal and infant growth in relation to infantile atopic eczema. Methods Within the UK Southampton Women's Survey, 1,759 infants with known maternal menstrual data had anthropometric measurements at 11, 19, and 34 weeks' gestation, birth, and ages 6 and 12 months, enabling derivation of growth velocity SD scores. Infantile atopic eczema at ages 6 and/or 12 months was ascertained using modified UK Working Party diagnostic criteria. Results Expressed per SD increase, higher femur length and abdominal circumference at 34 weeks' gestation were associated with decreased risks of atopic eczema (eczema OR/SD increase 0.81 [95% CI 0.69-0.96], P=0.017 and 0.78 [95% CI 0.65-0.93], P=0.006, respectively), while every SD increase in head to abdominal circumference ratio (indicating disproportionate growth) was associated with an increase in risk of atopic eczema (1.37 [1.15-1.63], P=0.001). Lower velocities of linear growth from 11 weeks' gestation to birth and birth to age 6 months were associated with atopic eczema (atopic eczema OR/SD increase 0.80 [0.65-0.98], P=0.034 and 0.8 [1 0.66-1.00], P=0.051, respectively). Infants with atopic eczema at age 12 months had a larger head circumference in early gestation and faltering of abdominal growth velocity from 19 to 34 weeks' gestation (atopic eczema OR/SD increase 0.67 [0.51-0.88], P=0.003). Conclusion Infants with atopic eczema demonstrate altered patterns of fetal growth, including faltering of linear growth in utero, prior to the clinical onset of atopic eczema. These findings suggest growth falters prior to the start of clinical atopic eczema and its treatment.
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Affiliation(s)
- Sarah El-Heis
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK,
| | - Sarah R Crozier
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK,
| | - Eugene Healy
- Dermatopharmacology, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Sian M Robinson
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK, .,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK,
| | - Nicholas C Harvey
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK, .,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK,
| | - Cyrus Cooper
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK, .,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK, .,NIHR Musculoskeletal Biomedical Research Unit, University of Oxford, Oxford, UK
| | - Hazel M Inskip
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK, .,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK,
| | - Janis Baird
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK, .,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK,
| | - Keith M Godfrey
- Medical Research Council Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK, .,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK, .,Institute of Developmental Sciences, University of Southampton, Southampton, UK,
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39
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Ochoa Sangrador C, Vázquez Blanco A. Day-care center attendance and risk of Asthma-A systematic review. Allergol Immunopathol (Madr) 2018; 46:578-584. [PMID: 30318106 DOI: 10.1016/j.aller.2018.03.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Revised: 03/05/2018] [Accepted: 03/27/2018] [Indexed: 11/17/2022]
Abstract
INTRODUCTION AND OBJECTIVES Asthma and other wheezing disorders are common chronic health problems in childhood. We aim to evaluate whether the attendance by children under three years of age to day-care centers is a protector or risk factor in the development of recurrent wheezing or asthma in the following years of their lives. METHODS Systematic review of published cohort or cross-sectional studies, without any time limitation. We searched in PubMed, Cinhal, Cuiden and Scopus (EMBASE included). The quality of the studies was evaluated using the Newcastle-Ottawa Scale. Disagreements were solved by mutual consensus. Weighted odds ratio (ORs) were estimated using RevMan 5.3, following random effects models. RESULTS We selected 18 studies for qualitative analysis, nine cohort studies and nine cross-sectional studies. Day-care center attendance is associated with an increased risk of early recurrent wheezing (four studies; 50,619 subjects; adjusted OR 1.87 [1.21 to 2.88]; I2 91%) and asthma before the age of six (five studies; 5412 subjects; adjusted OR 1.59 [1.26 to 2.01]; I2 0%), but not later (five studies; 5538 subjects; adjusted OR 0.86 [0.55 to 1.32]; I2 76%). CONCLUSIONS Children attending day-care center during the first years of life have a higher risk of recurrent wheezing during the first three years and asthma before the age of six, but not later. This risk must be taken into account to inform parents in order to choose what kind of care children should have throughout infancy and to implement preventive measures to reduce its impact.
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Affiliation(s)
- Carlos Ochoa Sangrador
- Carlos Ochoa Sangrador; MD PhD; Hospital Virgen de la Concha. Avd. Requejo 35; 49022 Zamora, Spain; Alba Vazquez Blanco; Nurse; School of Nursing. Avd. Requejo 33; 49022 Zamora, Spain.
| | - Alba Vázquez Blanco
- Carlos Ochoa Sangrador; MD PhD; Hospital Virgen de la Concha. Avd. Requejo 35; 49022 Zamora, Spain; Alba Vazquez Blanco; Nurse; School of Nursing. Avd. Requejo 33; 49022 Zamora, Spain
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40
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Tang HH, Teo SM, Belgrave DC, Evans MD, Jackson DJ, Brozynska M, Kusel MM, Johnston SL, Gern JE, Lemanske RF, Simpson A, Custovic A, Sly PD, Holt PG, Holt KE, Inouye M. Trajectories of childhood immune development and respiratory health relevant to asthma and allergy. eLife 2018; 7:35856. [PMID: 30320550 PMCID: PMC6221547 DOI: 10.7554/elife.35856] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 10/05/2018] [Indexed: 12/28/2022] Open
Abstract
Events in early life contribute to subsequent risk of asthma; however, the causes and trajectories of childhood wheeze are heterogeneous and do not always result in asthma. Similarly, not all atopic individuals develop wheeze, and vice versa. The reasons for these differences are unclear. Using unsupervised model-based cluster analysis, we identified latent clusters within a prospective birth cohort with deep immunological and respiratory phenotyping. We characterised each cluster in terms of immunological profile and disease risk, and replicated our results in external cohorts from the UK and USA. We discovered three distinct trajectories, one of which is a high-risk ‘atopic’ cluster with increased propensity for allergic diseases throughout childhood. Atopy contributes varyingly to later wheeze depending on cluster membership. Our findings demonstrate the utility of unsupervised analysis in elucidating heterogeneity in asthma pathogenesis and provide a foundation for improving management and prevention of childhood asthma. Asthma causes wheezy and troubled breathing, and can be life-threatening. Scientists and doctors understand that asthma begins in early childhood. Chest infections, exposure to bacteria, viruses, and allergies may cause or trigger asthma. One person with asthma may not have the same origins as another. But it is not yet clear how various triggers may interact to trigger or exacerbate asthma. To disentangle how these factors contribute to asthma, experts have tried to group people with asthma into subgroups. Unfortunately, the groups often vary from expert to expert. Now, some scientists are using computers to sort patients with asthma. The scientists let the computers decide the best criteria for sorting patients. This way the machines may identify patterns that are not obvious to humans. Using this computer-based approach, Tang et al. sorted Australian children with asthma into 3 groups based on their early life allergies and respiratory health. One group has high-risk asthma with frequent chest infections and strong allergic responses. The other two groups are low-risk, but they respond differently to allergy and infection. Common tests used by doctors to diagnose patients with allergy or asthma may not work the same with all three groups. The bacteria found in the nose influence the risk of asthma, even in patients who are well, and the way this occurs varies by group. Similar groups were also found among children with asthma in the United States and the United Kingdom. Learning more about subgroups of patients with asthma may help other scientists and doctors design better ways to diagnose, treat, or prevent asthma. Working together with scientists around the world to determine how to best describe subgroups of people according to asthma type and risk is a critical step in the process. Tang et al. hope other scientist will test whether these three groups are also found in people from other parts of the world.
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Affiliation(s)
- Howard Hf Tang
- Cambridge Baker Systems Genomics Initiative, Baker Heart and Diabetes Institute, Victoria, Australia.,School of BioSciences, The University of Melbourne, Victoria, Australia
| | - Shu Mei Teo
- Cambridge Baker Systems Genomics Initiative, Baker Heart and Diabetes Institute, Victoria, Australia.,Cambridge Baker Systems Genomics Initiative, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
| | | | - Michael D Evans
- Cambridge Baker Systems Genomics Initiative, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom.,University of Wisconsin School of Medicine and Public Health, Madison, United States
| | - Daniel J Jackson
- University of Wisconsin School of Medicine and Public Health, Madison, United States
| | - Marta Brozynska
- Cambridge Baker Systems Genomics Initiative, Baker Heart and Diabetes Institute, Victoria, Australia.,Department of Paediatrics, Imperial College London, London, United Kingdom
| | - Merci Mh Kusel
- Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - Sebastian L Johnston
- Airway Disease Infection Section, MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - James E Gern
- University of Wisconsin School of Medicine and Public Health, Madison, United States
| | - Robert F Lemanske
- University of Wisconsin School of Medicine and Public Health, Madison, United States
| | - Angela Simpson
- Division of Infection, Immunity and Respiratory Medicine, The University of Manchester, Manchester, United Kingdom
| | - Adnan Custovic
- Department of Paediatrics, Imperial College London, London, United Kingdom
| | - Peter D Sly
- Telethon Kids Institute, University of Western Australia, Perth, Australia.,Child Health Research Centre, The University of Queensland, Brisbane, Australia
| | - Patrick G Holt
- Telethon Kids Institute, University of Western Australia, Perth, Australia.,Child Health Research Centre, The University of Queensland, Brisbane, Australia
| | - Kathryn E Holt
- Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria, Australia.,The London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Michael Inouye
- Cambridge Baker Systems Genomics Initiative, Baker Heart and Diabetes Institute, Victoria, Australia.,Cambridge Baker Systems Genomics Initiative, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom.,The Alan Turing Institute, London, United Kingdom
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41
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Saiganesh A, Hales BJ, Li Y, Holt PG, Le Souëf PN, Zhang G. A marked shift in innate and adaptive immune response in chinese immigrants living in a western environment. Allergy 2018; 73:2092-2094. [PMID: 29935021 DOI: 10.1111/all.13531] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Aarti Saiganesh
- School of Paediatrics and Child Health University of Western Australia Perth WA Australia
- Telethon Kids Institute University of Western Australia Perth WA Australia
| | - Belinda J. Hales
- Telethon Kids Institute University of Western Australia Perth WA Australia
| | - Yuchun Li
- Xinxiang Medical University Henan China
| | - Patrick G. Holt
- Telethon Kids Institute University of Western Australia Perth WA Australia
| | - Peter N. Le Souëf
- School of Paediatrics and Child Health University of Western Australia Perth WA Australia
| | - Guicheng Zhang
- School of Paediatrics and Child Health University of Western Australia Perth WA Australia
- Telethon Kids Institute University of Western Australia Perth WA Australia
- Xinxiang Medical University Henan China
- School of Public Health Curtin University Perth WA Australia
- Centre for Genetic Origins of Health and Disease Faculty of Health and Medical Sciences Faculty of Health and Medical Sciences Curtin University he University of Western Australia and Royal Perth Hospital Research Foundation Perth WA Australia
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42
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Walsh P, Rothenberg SJ. Wheezing after the use of acetaminophen and or ibuprofen for first episode of bronchiolitis or respiratory tract infection. PLoS One 2018; 13:e0203770. [PMID: 30212517 PMCID: PMC6136746 DOI: 10.1371/journal.pone.0203770] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Accepted: 08/27/2018] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Bronchiolitis sometimes triggers the development of subsequent recurrent wheezing. Treatment with either acetaminophen or ibuprofen during the initial episode may affect the occurrence of subsequent wheezing. MATERIALS AND METHODS We did a retrospective study comparing the effect of prescribing acetaminophen, ibuprofen, or neither for a first episode of bronchiolitis on medical attendances for subsequent wheezing in infants younger than 12 months. We created our cohorts using California Medicaid data from 2003 to 2010. We used propensity score derived inverse probability weights to adjust for non-random drug assignment. We used robust negative binomial regression to model incident rate ratios (IRR) for medical attendances at 365, 30, and 14-day follow-up. We did similar analyses for the effect of antipyretics for a first medically attended upper respiratory tract infection (URI) on subsequent wheezing. RESULTS Compared with no antipyretic, treatment with acetaminophen or ibuprofen for a first episode of bronchiolitis was associated with decreased wheezing at 365-day follow-up (IRR 0.18, 95% CI 0.15-0.22), and ibuprofen plus acetaminophen over ibuprofen (IRR at 0.12, 95% CI 0.05-0.32). The results were similar at 30 and 14-day follow-up. Ibuprofen alone and ibuprofen plus acetaminophen were associated with decreased visits for subsequent wheezing at 365-day (IRR 0.79, 95% CI 0.68-0.92), but not earlier timepoints, when compared with acetaminophen. A smaller effect was seen for ibuprofen at one year if prescribed for a URI (IRR 0.87, 95% CI 0.76-1.00) but not at earlier follow-up. CONCLUSION Children who are prescribed antipyretics for a first episode of bronchiolitis may have less subsequent wheezing than those who are not. We found fewer visits for subsequent wheezing for those prescribed ibuprofen, and ibuprofen combined with acetaminophen, compared with acetaminophen alone.
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Affiliation(s)
- Paul Walsh
- Pediatric Emergency Medicine, Sutter Medical Center, Sacramento, CA, United States of America
- * E-mail:
| | - Stephen J. Rothenberg
- Instituto Nacional de Salud Pública, Centro de Investigación en Salud Poblacional, Cuernavaca, Morelos, Mexico
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43
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Shamji MH, Temblay JN, Cheng W, Byrne SM, Macfarlane E, Switzer AR, Francisco NDC, Olexandra F, Jacubczik F, Durham SR, Ashton-Rickardt PG. Antiapoptotic serine protease inhibitors contribute to survival of allergenic T H2 cells. J Allergy Clin Immunol 2018; 142:569-581.e5. [PMID: 29106998 PMCID: PMC5920800 DOI: 10.1016/j.jaci.2017.07.055] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 07/07/2017] [Accepted: 07/20/2017] [Indexed: 12/31/2022]
Abstract
BACKGROUND The mechanisms that regulate maintenance of persistent TH2 cells and potentiate allergic inflammation are not well understood. OBJECTIVE The function of serine protease inhibitor 2A (Spi2A) was studied in mouse TH2 cells, and the serine protease inhibitor B3 (SERPINB3) and SERPINB4 genes were studied in TH2 cells from patients with grass pollen allergy. METHODS Spi2A-deficient TH2 cells were studied in in vitro culture or in vivo after challenge of Spi2A knockout mice with ovalbumin in alum. Expression of SERPINB3 and SERPINB4 mRNA was measured in in vitro-cultured TH2 cells and in ex vivo CD27-CD4+ cells and innate lymphoid cell (ILC) 2 from patients with grass pollen allergy by using quantitative PCR. SERPINB3 and SERPINB4 mRNA levels were knocked down in cultured CD27-CD4+ cells with small hairpin RNA. RESULTS There were lower levels of in vitro-polarized TH2 cells from Spi2A knockout mice (P < .005) and in vivo after ovalbumin challenge (P < .05), higher levels of apoptosis (Annexin V positivity, P < .005), and less lung allergic inflammation (number of lung eosinophils, P < .005). In vitro-polarized TH2 cells from patients with grass pollen allergy expressed higher levels of both SERPINB3 and SERPINB4 mRNA (both P < .05) compared with unpolarized CD4 T cells. CD27-CD4+ from patients with grass pollen allergy expressed higher levels of both SERPINB3 and SERPINB4 mRNA (both P < .0005) compared with CD27+CD4+ cells. ILC2 expressed higher levels of both SERPINB3 and SERPINB4 mRNA (both P < .0005) compared with ILC1. Knockdown of either SERPINB3 or SERPINB4 mRNA (both P < .005) levels resulted in decreased viability of CD27-CD4+ compared with control transduced cells. CONCLUSION The Serpins Spi2A in mice and SERPINB3 and SERPINB4 in allergic patients control the viability of TH2 cells. This provides proof of principle for a therapeutic approach for allergic disease through ablation of allergic memory TH2 cells through SERPINB3 and SERPINB4 mRNA downregulation.
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Affiliation(s)
- Mohamed H Shamji
- Immunomodulation and Tolerance Group, London, United Kingdom; Allergy and Clinical Immunology, Inflammation, Repair and Development, National Heart and Lung Institute, Imperial College London, and the MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, London, United Kingdom
| | - Jeff N Temblay
- Section of Immunobiology, Division of Inflammation and Immunology, Department of Medicine, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Wei Cheng
- Section of Immunobiology, Division of Inflammation and Immunology, Department of Medicine, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Susan M Byrne
- Section of Immunobiology, Division of Inflammation and Immunology, Department of Medicine, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Ellen Macfarlane
- Immunomodulation and Tolerance Group, London, United Kingdom; Allergy and Clinical Immunology, Inflammation, Repair and Development, National Heart and Lung Institute, Imperial College London, and the MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, London, United Kingdom
| | - Amy R Switzer
- Immunomodulation and Tolerance Group, London, United Kingdom; Allergy and Clinical Immunology, Inflammation, Repair and Development, National Heart and Lung Institute, Imperial College London, and the MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, London, United Kingdom
| | - Natalia D C Francisco
- Immunomodulation and Tolerance Group, London, United Kingdom; Allergy and Clinical Immunology, Inflammation, Repair and Development, National Heart and Lung Institute, Imperial College London, and the MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, London, United Kingdom
| | | | - Fabian Jacubczik
- Section of Immunobiology, Division of Inflammation and Immunology, Department of Medicine, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Stephen R Durham
- Immunomodulation and Tolerance Group, London, United Kingdom; Allergy and Clinical Immunology, Inflammation, Repair and Development, National Heart and Lung Institute, Imperial College London, and the MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, London, United Kingdom
| | - Philip G Ashton-Rickardt
- Section of Immunobiology, Division of Inflammation and Immunology, Department of Medicine, Faculty of Medicine, Imperial College London, London, United Kingdom.
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Hayen SM, den Hartog Jager CF, Knulst AC, Knol EF, Garssen J, Willemsen LEM, Otten HG. Non-Digestible Oligosaccharides Can Suppress Basophil Degranulation in Whole Blood of Peanut-Allergic Patients. Front Immunol 2018; 9:1265. [PMID: 29942305 PMCID: PMC6004414 DOI: 10.3389/fimmu.2018.01265] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 05/22/2018] [Indexed: 11/22/2022] Open
Abstract
Background Dietary non-digestible oligosaccharides (NDOs) have a protective effect against allergic manifestations in children at risk. Dietary intervention with NDOs promotes the colonization of beneficial bacteria in the gut and enhances serum galectin-9 levels in mice and atopic children. Next to this, NDOs also directly affect immune cells and low amounts may reach the blood. We investigated whether pre-incubation of whole blood from peanut-allergic patients with NDOs or galectin-9 can affect basophil degranulation. Methods Heparinized blood samples from 15 peanut-allergic adult patients were pre-incubated with a mixture of short-chain galacto-oligosaccharides and long-chain fructo-oligosaccharides (scGOS/lcFOS), scFOS/lcFOS, or galectin-9 (1 or 5 µg/mL) at 37°C in the presence of IL-3 (0.75 ng/mL). After 2, 6, or 24 h, a basophil activation test was performed. Expression of FcεRI on basophils, plasma cytokine, and chemokine concentrations before degranulation were determined after 24 h. Results Pre-incubation with scGOS/lcFOS, scFOS/lcFOS, or galectin-9 reduced anti-IgE-mediated basophil degranulation. scFOS/lcFOS or 5 µg/mL galectin-9 also decreased peanut-specific basophil degranulation by approximately 20%, mainly in whole blood from female patients. Inhibitory effects were not related to diminished FcεRI expression on basophils. Galectin-9 was increased in plasma after pre-incubation with scGOS/lcFOS, and both NDOs and 5 µg/mL galectin-9 increased MCP-1 production. Conclusion and clinical relevance The prebiotic mixture scFOS/lcFOS and galectin-9 can contribute to decreased degranulation of basophils in vitro in peanut-allergic patients. The exact mechanism needs to be elucidated, but these NDOs might be useful in reducing allergic symptoms.
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Affiliation(s)
- Simone M Hayen
- Department of Dermatology/Allergology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands.,Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Constance F den Hartog Jager
- Department of Dermatology/Allergology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands.,Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht, Netherlands
| | - André C Knulst
- Department of Dermatology/Allergology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - Edward F Knol
- Department of Dermatology/Allergology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands.,Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Johan Garssen
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands.,Nutricia Research, Immunology, Utrecht, Netherlands
| | - Linette E M Willemsen
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Henny G Otten
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht, Netherlands
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45
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Zhang Y, Maksimovic J, Huang B, De Souza DP, Naselli G, Chen H, Zhang L, Weng K, Liang H, Xu Y, Wentworth JM, Huntington ND, Oshlack A, Gong S, Kallies A, Vuillermin P, Yang M, Harrison LC. Cord Blood CD8 + T Cells Have a Natural Propensity to Express IL-4 in a Fatty Acid Metabolism and Caspase Activation-Dependent Manner. Front Immunol 2018; 9:879. [PMID: 29922282 PMCID: PMC5996926 DOI: 10.3389/fimmu.2018.00879] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 04/09/2018] [Indexed: 12/24/2022] Open
Abstract
How T cells differentiate in the neonate may critically determine the ability of the infant to cope with infections, respond to vaccines and avert allergies. Previously, we found that naïve cord blood CD4+ T cells differentiated toward an IL-4-expressing phenotype when activated in the presence of TGF-β and monocyte-derived inflammatory cytokines, the latter are more highly secreted by infants who developed food allergy. Here, we show that in the absence of IL-2 or IL-12, naïve cord blood CD8+ T cells have a natural propensity to differentiate into IL-4-producing non-classic TC2 cells when they are activated alone, or in the presence of TGF-β and/or inflammatory cytokines. Mechanistically, non-classic TC2 development is associated with decreased expression of IL-2 receptor alpha (CD25) and glycolysis, and increased fatty acid metabolism and caspase-dependent cell death. Consequently, the short chain fatty acid, sodium propionate (NaPo), enhanced IL-4 expression, but exogenous IL-2 or pan-caspase inhibition prevented IL-4 expression. In children with endoscopically and histologically confirmed non-inflammatory bowel disease and non-infectious pediatric idiopathic colitis, the presence of TGF-β, NaPo, and IL-1β or TNF-α promoted TC2 differentiation in vitro. In vivo, colonic mucosa of children with colitis had significantly increased expression of IL-4 in CD8+ T cells compared with controls. In addition, activated caspase-3 and IL-4 were co-expressed in CD8+ T cells in the colonic mucosa of children with colitis. Thus, in the context of colonic inflammation and limited IL-2 signaling, CD8+ T cells differentiate into non-classic TC2 that may contribute to the pathology of inflammatory/allergic diseases in children.
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Affiliation(s)
- Yuxia Zhang
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China.,Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Jovana Maksimovic
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia.,Department of Pediatrics, University of Melbourne, Parkville, VIC, Australia
| | - Bing Huang
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - David Peter De Souza
- Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia.,Bio21 Institute, University of Melbourne, Parkville, VIC, Australia
| | - Gaetano Naselli
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Huan Chen
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Li Zhang
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Kai Weng
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Hanquan Liang
- School of Data and Computer Science, Sun Yat-sen University, Guangzhou, China
| | - Yanhui Xu
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - John M Wentworth
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Nicholas D Huntington
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Alicia Oshlack
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia.,Department of Pediatrics, University of Melbourne, Parkville, VIC, Australia
| | - Sitang Gong
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Axel Kallies
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Peter Vuillermin
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia.,Department of Pediatrics, University of Melbourne, Parkville, VIC, Australia.,Barwon Health, Geelong, VIC, Australia.,Deakin University, Geelong, VIC, Australia
| | - Min Yang
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Leonard C Harrison
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
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46
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Kim JA, Kim SH, Kim IS, Yu DY, Kim SC, Lee SH, Lee SS, Yun CH, Choi IS, Cho KK. Anti-Inflammatory Effects of a Mixture of Lactic Acid Bacteria and Sodium Butyrate in Atopic Dermatitis Murine Model. J Med Food 2018; 21:716-725. [PMID: 29648971 DOI: 10.1089/jmf.2017.4116] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Atopic dermatitis is a chronic and recurrent inflammatory skin disease. Recently, probiotics have been shown to suppress allergic symptoms through immunomodulatory responses. In the present study, combinatorial effects on allergic symptoms were identified in BALB/c mice fed with a mixture of four species of probiotics, Bifidobacterium lactis, Lactobacillus casei, Lactobacillus rhamnosus, and Lactobacillus plantarum, and sodium butyrate. Following sensitization with whey protein, the mice were challenged and divided into two groups: (1) mice administered with phosphate-buffered saline as a control and (2) mice administered with the probiotic mixture and sodium butyrate. Allergic symptoms were assessed by measuring ear thicknesses, serum histamine and IL-10 concentrations, and the quantities of leaked Evans blue. T cell differentiation was determined by analyzing the T cells groups in the mesenteric lymph nodes (MLNs) and spleen. To examine changes in the total gut microbiota, total fecal microflora was isolated, species identification was performed by DNA sequencing using Illumina MiSeq, and changes in intestinal beneficial bacteria were analyzed using quantitative polymerase chain reaction. Treatment with the probiotic mixture and sodium butyrate reduced ear thicknesses, the quantity of leaked Evans blue, and serum histamine values, while increasing serum IL-10 values. In the mouse model, the probiotic mixture and sodium butyrate increased Th1 and Treg cell differentiation in MLN and spleen tissues; the ratio of Firmicutes/Bacteroidetes, which is associated with reduction in allergic reactions; and microorganisms that lead to cell differentiation into Treg. These results suggest that the probiotic mixture and sodium butyrate can prevent and alleviate allergic symptoms.
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Affiliation(s)
- Jeong A Kim
- 1 Department of Animal Resources Technology, Gyeongnam National University of Science and Technology , Jinju, Korea
| | - Sung-Hak Kim
- 2 Department of Animal Science, Chonnam National University , Gwangju, Korea
| | - In Sung Kim
- 1 Department of Animal Resources Technology, Gyeongnam National University of Science and Technology , Jinju, Korea
| | - Da Yoon Yu
- 1 Department of Animal Resources Technology, Gyeongnam National University of Science and Technology , Jinju, Korea
| | - Sung Chan Kim
- 3 Department of Biochemistry, Institute of Cell Differentiation and Aging, College of Medicine, Hallym University , Chuncheon, Korea
| | - Seung Ho Lee
- 4 Department of Nano-Bioengineering, Incheon National University , Incheon, Korea
| | - Sang Suk Lee
- 5 Department of Animal Science and Technology, Sunchon National University , Sunchon, Korea
| | - Cheol-Heui Yun
- 6 Department of Agricultural Biotechnology, Seoul National University , Seoul, Korea
| | - In Soon Choi
- 7 Department of Life Science, Silla University , Busan, Korea
| | - Kwang Keun Cho
- 1 Department of Animal Resources Technology, Gyeongnam National University of Science and Technology , Jinju, Korea
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47
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Chandra S, Wingender G, Greenbaum JA, Khurana A, Gholami AM, Ganesan AP, Rosenbach M, Jaffee K, Gern JE, Wood R, O'Connor G, Sandel M, Kattan M, Bacharier L, Togias A, Horner AA, Kronenberg M. Development of Asthma in Inner-City Children: Possible Roles of MAIT Cells and Variation in the Home Environment. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2018; 200:1995-2003. [PMID: 29431692 PMCID: PMC5840005 DOI: 10.4049/jimmunol.1701525] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 01/10/2018] [Indexed: 12/11/2022]
Abstract
Humans have populations of innate-like T lymphocytes with an invariant TCR α-chain that recognize nonpeptide Ags, including invariant NKT (iNKT) cells and mucosal-associated invariant T (MAIT) cells. iNKT cell involvement in human asthma is controversial, whereas there has been little analysis of MAIT cells. Using peripheral blood cells from 110 participants from the Urban Environment and Childhood Asthma (URECA) birth cohort study, these cells were analyzed for number and function. We determined whether iNKT cell or MAIT cell frequency at 1 y is correlated with the cytokine polarization of mainstream CD4+ T cells and/or the development of asthma by age 7 y. Dust samples from 300 houses were tested for iNKT cell antigenic activity. Our results show that a higher MAIT cell frequency at 1 y of age was associated with a decreased risk of asthma by age 7 y. The frequency of MAIT cells was associated with increased production of IFN-γ by activated CD4+ T cells from the URECA cohort. iNKT cell antigenic activity in bedroom dust samples was associated with higher endotoxin concentration and also with reduced risk of asthma. In conclusion, MAIT cell frequency at 1 y may reflect the tendency of the immune system toward Th1 responses and is associated with protection from asthma. Additionally, iNKT cell antigenic activity may be a marker of houses with increased microbial exposures and therefore also with protection from asthma.
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Affiliation(s)
- Shilpi Chandra
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037
| | - Gerhard Wingender
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037
- Izmir International Biomedicine and Genome Institute, Balcova, 35340 Izmir, Turkey
| | - Jason A Greenbaum
- Bioinformatics Core Facility, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037
| | - Archana Khurana
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037
| | - Amin M Gholami
- Bioinformatics Core Facility, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037
| | - Anusha-Preethi Ganesan
- Division of Pediatric Hematology-Oncology, Rady Children's Hospital, University of California San Diego, San Diego, CA 92093
- Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037
| | - Michael Rosenbach
- Department of Pediatrics, University of California San Diego, La Jolla, CA 92093
| | - Katy Jaffee
- Division of Federal Systems, Rho Inc., Chapel Hill, NC 27517
| | - James E Gern
- Department of Pediatrics and Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI 53726
| | - Robert Wood
- Division of Allergy and Immunology, Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD 212876
| | - George O'Connor
- Department of Medicine, Boston University School of Medicine, Boston, MA 02118
| | - Megan Sandel
- Department of Medicine, Boston University School of Medicine, Boston, MA 02118
| | - Meyer Kattan
- Division of Pediatric Pulmonology, Department of Pediatrics, New York Presbyterian/Columbia University Medical Center, New York, NY 10032
| | - Leonard Bacharier
- Division of Allergy, Immunology, and Pulmonary Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Alkis Togias
- National Institutes of Health, National Institute of Allergy and Infectious Diseases, Rockville, MD 20852; and
| | - Anthony A Horner
- Department of Pediatrics, University of California San Diego, La Jolla, CA 92093
| | - Mitchell Kronenberg
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037;
- Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093
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48
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Kikkawa T, Yorifuji T, Fujii Y, Yashiro M, Okada A, Ikeda M, Doi H, Tsukahara H. Birth order and paediatric allergic disease: A nationwide longitudinal survey. Clin Exp Allergy 2018; 48:577-585. [PMID: 29368358 DOI: 10.1111/cea.13100] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 11/24/2017] [Accepted: 12/21/2017] [Indexed: 01/14/2023]
Abstract
BACKGROUND Environmental factors seem to be related to the incidence of allergic disease. Children with a later birth order are often exposed to environments, where pathogens and endotoxins can be found, and thus have a higher risk of developing infectious diseases. Therefore, birth order is regarded as an indicator that reflects post-natal environment. However, longitudinal studies are limited on this subject. This study sought to elucidate the relationships between birth order and allergic disease. METHODS From a nationwide longitudinal study that followed children born in 2001 (n = 47 015), we selected doctors' visits for 3 types of allergic disease-bronchial asthma, food allergy and atopic dermatitis-from infancy to 12 years of age and conducted binomial log-linear regression analysis to evaluate the associations between birth order and these diseases. We adjusted for the child and parental factors and estimated risk ratio (RR) and 95% confidence interval (CI) for each outcome. RESULTS The associations between birth order and bronchial asthma were diverse; later birth order increased the risk in early childhood, but decreased the risks during school age. For example, the adjusted RR comparing third-born or higher and first-born children was 1.19 (95% CI, 1.05-1.35) between 30 and 42 months of age, but was 0.76 (95% CI, 0.65-0.89) between 10 and 11 years. Later birth order was generally protective for food allergy but increased the risk of atopic dermatitis. CONCLUSION The influence of birth order depended on the type of allergic disease and the childhood period. Childhood is unique in terms of physical and immunological development, and the immune response to the post-natal environment in childhood appears to be heterogeneous.
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Affiliation(s)
- T Kikkawa
- Department of Pediatrics, Okayama University Hospital, Okayama, Japan.,Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - T Yorifuji
- Department of Human Ecology, Okayama University Graduate School of Environmental and Life Science, Okayama, Japan
| | - Y Fujii
- Department of Pediatric Acute Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - M Yashiro
- Department of Pediatrics, Okayama University Hospital, Okayama, Japan
| | - A Okada
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - M Ikeda
- Department of Pediatric Acute Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - H Doi
- Department of Epidemiology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - H Tsukahara
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
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49
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Kim DH, Han K, Kim SW. Effects of Antibiotics on the Development of Asthma and Other Allergic Diseases in Children and Adolescents. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2018; 10:457-465. [PMID: 30088366 PMCID: PMC6082825 DOI: 10.4168/aair.2018.10.5.457] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 04/17/2018] [Accepted: 05/03/2018] [Indexed: 01/15/2023]
Abstract
Purpose Our aim was to explore whether antibiotic exposure in children and adolescents is associated with the later development of allergic diseases, using nationwide population-based claims data. Methods We collected information from the National Health Insurance Service (2006–2015) database. A total of 5,626,328 children and adolescents were eligible for the study. We explored whether exposure to antibiotics over the prior 7 years affects the later development of allergic diseases. We ran 3 analytical models after adjusting for confounding factors including age, sex, the number of visits to healthcare providers, income, and the place of residence (urban/rural). Results Allergic diseases were most common in male children and those aged < 10 years (atopic dermatitis, asthma and allergic rhinitis; all P < 0.01). Also, urban residents with higher incomes were more likely to develop allergic diseases (all P < 0.01). The annual number of days on which antibiotics were prescribed differed significantly between subjects with each allergic disease studied and a comparison group (all P < 0.01). Multiple logistic regression showed that as the duration of antibiotic exposure increased, the incidences of atopic dermatitis, asthma, and allergic rhinitis trended upward, even after adjusting for confounding factors (P for trend < 0.01). Conclusions Antibiotic use early in life is associated with an increased risk of allergic disease, especially in young children; the risk increases as the duration of antibiotic therapy rises. Moreover, urban residence was more strongly associated with a longer duration of antibiotic use than was rural residence.
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Affiliation(s)
- Do Hyun Kim
- Department of Otolaryngology-Head and Neck Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Kyungdo Han
- Department of Biostatistics, The Catholic University of Korea, Seoul, Korea
| | - Soo Whan Kim
- Department of Otolaryngology-Head and Neck Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
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50
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West CE, Dzidic M, Prescott SL, Jenmalm MC. Bugging allergy; role of pre-, pro- and synbiotics in allergy prevention. Allergol Int 2017; 66:529-538. [PMID: 28865967 DOI: 10.1016/j.alit.2017.08.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 08/02/2017] [Accepted: 08/02/2017] [Indexed: 02/07/2023] Open
Abstract
Large-scale biodiversity loss and complex changes in social behaviors are altering human microbial ecology. This is increasingly implicated in the global rise in inflammatory diseases, most notably the "allergy epidemic" in very early life. Colonization of human ecological niches, particularly the gastrointestinal tract, is critical for normal local and systemic immune development and regulation. Disturbances in composition, diversity and timing of microbial colonization have been associated with increased allergy risk, indicating the importance of strategies to restore a dysbiotic gut microbiota in the primary prevention of allergic diseases, including the administration of probiotics, prebiotics and synbiotics. Here, we summarize and discuss findings of randomized clinical trials that have examined the effects of these microbiome-related strategies on short and long-term allergy preventative effects - including new guidelines from the World Allergy Organization which now recommend probiotics and prebiotics for allergy prevention under certain conditions. The relatively low quality evidence, limited comparative studies and large heterogeneity between studies, have collectively hampered recommendations on specific probiotic strains, specific timing and specific conditions for the most effective preventive management. At the same time the risk of using available products is low. While further research is needed before specific practice guidelines on supplement probiotics and prebiotics, it is equally important that the underlying dietary and lifestyle factors of dysbiosis are addressed at both the individual and societal levels.
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Affiliation(s)
- Christina E West
- Department of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden; inFLAME Global Network (Worldwide Universities Network), West New York, NJ, USA.
| | - Majda Dzidic
- inFLAME Global Network (Worldwide Universities Network), West New York, NJ, USA; Division of Neuro and Inflammation Sciences, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden; Institute of Agrochemistry and Food Technology, Spanish National Research Council (IATA-CSIC), Department of Biotechnology, Unit of Lactic Acid Bacteria and Probiotics, Valencia, Spain
| | - Susan L Prescott
- inFLAME Global Network (Worldwide Universities Network), West New York, NJ, USA; School of Paediatrics and Child Health, University of Western Australia and Princess Margaret Hospital for Children, Perth, Australia
| | - Maria C Jenmalm
- inFLAME Global Network (Worldwide Universities Network), West New York, NJ, USA; Division of Neuro and Inflammation Sciences, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
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