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Biagioni B, Scala E, Cecchi L. What molecular allergy teaches us about genetics and epidemiology of allergies. Curr Opin Allergy Clin Immunol 2024; 24:280-290. [PMID: 38640142 DOI: 10.1097/aci.0000000000000990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2024]
Abstract
PURPOSE OF REVIEW To delineate pertinent information regarding the application of molecular allergology within the realm of both genetic and epidemiological facets of allergic diseases. RECENT FINDINGS The emergence of molecular allergy has facilitated the comprehension of the biochemical characteristics of allergens originating from diverse sources. It has allowed for the exploration of sensitization trajectories and provided novel insights into the influence of genetics and environmental exposure on the initiation and development of allergic diseases. This review delves into the primary discoveries related to the genetics and epidemiology of allergies, facilitated by the application of molecular allergy. It also scrutinizes the impact of environmental exposure across varied geoclimatic, socioeconomic, and lifestyle contexts. Additionally, the review introduces specific models of molecular allergy within the realms of plants and animals. SUMMARY The utilization of molecular allergy in clinical practice holds crucially acknowledged diagnostic and therapeutic implications. From a research standpoint, there is a growing need for the widespread adoption of molecular diagnostic tools to achieve a more profound understanding of the epidemiology and natural progression of allergic diseases.
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Affiliation(s)
- Benedetta Biagioni
- Allergy and Clinical Immunology Unit, San Giovanni di Dio Hospital, Florence
| | - Enrico Scala
- Clinical and Laboratory Molecular Allergy Unit, IDI-IRCCS, Rome
| | - Lorenzo Cecchi
- SOSD Allergology and Clinical Immunology, USL Toscana Centro, Prato, Italy
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Bougault V, Valorso R, Sarda-Esteve R, Baisnee D, Visez N, Oliver G, Bureau J, Abdoussi F, Ghersi V, Foret G. Paris air quality monitoring for the 2024 Olympics and Paralympics: focus on air pollutants and pollen. Br J Sports Med 2024:bjsports-2024-108129. [PMID: 39054048 DOI: 10.1136/bjsports-2024-108129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/06/2024] [Indexed: 07/27/2024]
Abstract
BACKGROUND Exposure to air pollution can affect the health of individuals with respiratory disease, but may also impede the health and performance of athletes. This is potentially relevant for people travelling to and competing in the Olympic and Paralympic Games (OPG) in Paris. We describe anticipated air quality in Paris based on historical monitoring data and describe the impact of the process on the development of monitoring strategies for future international sporting events. METHODS Air pollutant data for July to September 2020-2023 and pollen data for 2015-2022 were provided by Airparif (particulate matter (PM2.5), nitrogen dioxide (NO2) and ozone (O3)) and RNSA stations in the Paris region. Airparif's street-level numerical modelling provided spatial data for the OPG venues. RESULTS The maximum daily mean PM2.5 was 11±6 µg/m3 at traffic stations, below the WHO recommended daily air quality threshold (AQT). Daily NO2 concentrations ranged from 5±3 µg/m3 in rural areas to 17±14 µgm3 in urban areas. Near traffic stations, this rose to 40±24 µg/m3 exceeding the WHO AQT. Both peaked around 06:00 and 20:00 UTC (coordinated universal time). The ambient O3 level exceeded the AQT on 20 days per month and peaked at 14:00 UTC. The main allergenic taxa from June to September was Poaceae (ie, grass pollen variety). CONCLUSION Air pollutant levels are expected to be within accepted air quality thresholds at the Paris OPG. However, O3 concentrations may be significantly raised in very hot and clear conditions and grass pollen levels will be high, prompting a need to consider and manage this risk in susceptible individuals.
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Affiliation(s)
| | - Richard Valorso
- CNRS, LISA F-94010, Université Paris Est Créteil and Université Paris Cité, Créteil, France
| | - Roland Sarda-Esteve
- CEA Orme des merisiers, UMR 8212, Laboratoire des Sciences du Climat et de l'Environnement, Saint-Aubin, France
| | - Dominique Baisnee
- CEA Orme des merisiers, UMR 8212, Laboratoire des Sciences du Climat et de l'Environnement, Saint-Aubin, France
| | - Nicolas Visez
- CNRS, UMR, 8516, LASIRE - Laboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement, Université de Lille, Lille, France
- RNSA, Réseau National de Surveillance Aérobiologique, Brussieu, France
| | - Gilles Oliver
- RNSA, Réseau National de Surveillance Aérobiologique, Brussieu, France
| | | | | | | | - Gilles Foret
- CNRS, LISA F-94010, Université Paris Est Créteil and Université Paris Cité, Créteil, France
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Raissouni I, Achmakh L, Boullayali A, Bouziane H. Forecast models for start and peak dates of Poaceae pollen season in Tétouan (NW Morocco) using multiple regression analysis. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2024:10.1007/s00484-024-02739-w. [PMID: 39060702 DOI: 10.1007/s00484-024-02739-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 07/11/2024] [Accepted: 07/18/2024] [Indexed: 07/28/2024]
Abstract
Poaceae pollen is one of the most widespread sources of aeroallergens in the world. The aim of this study is to build predictive models for the pollen season start day (PSsd) and peak dates of the Poaceae pollen season and thus give an overview of the climatic parameters that have the greatest influence. In Tétouan, sampling was carried out using a volumetric spore trap of the Burkard Hirst type. The relationships between the PSsd, peak dates and meteorological parameters were determined using correlation analysis. The models were constructed using multiple regression analysis with data from 2008 to 2019 and tested on data from 2022. The PSsd was especially significantly influenced by minimum temperature during winter and precipitation in the autumn of the previous year. The peak dates were significantly correlated with precipitation in January, March and April, but not with temperature. Three models were obtained for each of the season's parameters; the most accurate model for the PSsd explained a variability of 61% and includes as main predictors rainfall from the autumn of the previous year and the mean daily average temperature from 23 February to 8 March. The two most efficient peak dates models included precipitation in January and April as the main predictor variables, and explained greater variability (87 and 88%). Precipitation in autumn and the mean daily and the sum of minimum temperature in winter, showed significant decreasing tendencies. However, the PSsd trend delay was not statistically significant. This study draws the importance of the weather during preseason for grass pollen production and emphasises the usefulness of the models for allergic patients to take preventive measures and for healthcare professionals in allergy therapy.
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Affiliation(s)
- Ijlal Raissouni
- Laboratory of Biology, Ecology and Health, University Abdelmalek Essaâdi Faculty of Sciences,, Mhannech II-Postal Code 2121, Tétouan, Morocco.
| | - Lamiaa Achmakh
- Laboratory of Biology, Ecology and Health, University Abdelmalek Essaâdi Faculty of Sciences,, Mhannech II-Postal Code 2121, Tétouan, Morocco
| | - Asmaa Boullayali
- Laboratory of Biology, Ecology and Health, University Abdelmalek Essaâdi Faculty of Sciences,, Mhannech II-Postal Code 2121, Tétouan, Morocco
| | - Hassan Bouziane
- Laboratory of Biology, Ecology and Health, University Abdelmalek Essaâdi Faculty of Sciences,, Mhannech II-Postal Code 2121, Tétouan, Morocco.
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Zhong J, Li W, Yang S, Shen Y, Li X. Causal association between air pollution and allergic rhinitis, asthma: a Mendelian randomization study. Front Public Health 2024; 12:1386341. [PMID: 39076418 PMCID: PMC11284075 DOI: 10.3389/fpubh.2024.1386341] [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: 02/15/2024] [Accepted: 07/03/2024] [Indexed: 07/31/2024] Open
Abstract
Backgrounds Observational studies suggest that air pollutants, including particulate matter and nitrogen compounds, could elevate asthma and allergic rhinitis health risks. Nevertheless, the exact nature of the causal relationship between air pollution and asthma and allergic rhinitis remains unknown. This study utilizes the Mendelian randomization (MR) technique to explore the potential causal links between air pollution components (PM2.5, PM2.5-10, PM10, NO₂, and nitrogen dioxide) and the incidence of allergic rhinitis and asthma. Methods A MR study utilized summary statistics from GWAS that are publicly accessible. The inverse variance weighting (IVW) approach served as the foundational analysis technique. To ensure robustness, supplementary methodologies such as the weighted median, MR-Egger regression, simple mode, and weighted model were also applied. Heterogeneity was evaluated using Cochran's Q test, and the presence of pleiotropy was determined through MR-Egger regression. The MR-PRESSO test was employed for outlier detection, and the analysis's sensitivity was scrutinized via a leave-one-out strategy. Results The IVW technique showed a strong correlation between PM10 and asthma (OR = 0.625, 95% CI = 0.396-0.988, p = 0.044). No significant associations were found between asthma and other air pollutants such as PM2.5, PM2.5-10, NO₂, or nitrogen dioxide. Similarly, allergic rhinitis showed no causal relationships with any studied air pollution metrics. Pleiotropy was absent in the findings. Sensitivity analyses, employing the leave-one-out method, confirmed the stability of these results, unaffected by individual single nucleotide polymorphisms (SNPs). Conclusion This Mendelian randomization study establishes a causal link between PM10 exposure and asthma, suggesting that interventions to reduce air pollution may decelerate the adverse progression of asthma.
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Affiliation(s)
- Juan Zhong
- Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Weiye Li
- Chengdu Integrated TCM and Western Medicine Hospital/Chengdu First People’s Hospital, Chengdu, China
| | - Shasha Yang
- Otolaryngology Department, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Yifeng Shen
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xinrong Li
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Luyten A, Bürgler A, Glick S, Kwiatkowski M, Gehrig R, Beigi M, Hartmann K, Eeftens M. Ambient pollen exposure and pollen allergy symptom severity in the EPOCHAL study. Allergy 2024; 79:1908-1920. [PMID: 38659216 DOI: 10.1111/all.16130] [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: 11/17/2023] [Revised: 03/01/2024] [Accepted: 03/25/2024] [Indexed: 04/26/2024]
Abstract
BACKGROUND Ambient pollen exposure causes nasal, ocular, and pulmonary symptoms in allergic individuals, but the shape of the exposure-response association is not well characterized. We evaluated this association and determined (1) whether symptom severity differs between subpopulations; (2) how the association changes over the course of the pollen season; and (3) which pollen exposure time lags affect symptoms. METHODS Adult study participants (n = 396) repeatedly scored severity of nasal, ocular, and pulmonary allergic symptoms, resulting in three composite symptom scores. We calculated hourly individually relevant pollen exposure to seven allergenic plants (alder, ash, birch, hazel, grasses, mugwort, and ragweed) considering personal sensitization and exposure time lags of up to 96 h. We fitted generalized additive mixed models, with a random personal intercept, adjusting for weather and air pollution as potential time-varying confounders. RESULTS We identified a clear nonlinear positive association between pollen exposure and ocular and nasal symptom severity in the pollen allergy group: Symptom severity increased steeply with increasing exposure initially, but attenuated beyond approximately 80 pollen/m3. We found no evidence of an exposure threshold, below which no symptoms occur. While recent pollen exposure in the last approximately 5 h affected symptoms most, associations lingered for up to 60 h. Grass pollen exposure (compared to tree pollen) and younger age (18-30 years, as opposed to 30-65 years) were both associated with higher nasal and ocular symptom severity. CONCLUSIONS The lack of a threshold and attenuated dose-response curve may have implications for pollen warning systems, which may be revised to include multiday pollen concentrations in the future.
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Affiliation(s)
- Axel Luyten
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Alexandra Bürgler
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Sarah Glick
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Marek Kwiatkowski
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Regula Gehrig
- Federal Office of Meteorology and Climatology MeteoSwiss, Zurich, Switzerland
| | - Minaya Beigi
- Division of Allergy, Department of Dermatology, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Karin Hartmann
- Division of Allergy, Department of Dermatology, University Hospital Basel and University of Basel, Basel, Switzerland
- Department of Biomedicine, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Marloes Eeftens
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
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Song LB, Zhang L, Zhu Y, Yang YS, Xu ZQ, Sun JL, Wei JF. Identification of fructose-bisphosphate aldolase as new pollen allergens. Allergy 2024; 79:1368-1372. [PMID: 38375932 DOI: 10.1111/all.16058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 01/18/2024] [Accepted: 02/05/2024] [Indexed: 02/21/2024]
Affiliation(s)
- Le-Bin Song
- Department of Pharmacy, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, China
- Department of Dermatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Li Zhang
- Division of Respiratory and Critical Care Medicine, Respiratory Infection and Intervention Laboratory of Frontiers Science Center for Disease-related Molecular Network, State Key Laboratory of Biotherapy, West China Hospital of Sichuan University, Chengdu, China
| | - Ying Zhu
- Department of Blood Transfusion, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Yong-Shi Yang
- Department of Allergy, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Zhi-Qiang Xu
- Department of Pharmacy, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jin-Lyu Sun
- Department of Allergy, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Ji-Fu Wei
- Department of Pharmacy, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, China
- Department of Pharmacy, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Dadha P, Nimmagadda S, Venter C, Gupta R, Kumar PU, Warren CM. Reported food-related symptoms and food allergen sensitization in a selected adult population in Hyderabad, India: A hospital-based survey. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. GLOBAL 2024; 3:100204. [PMID: 38283084 PMCID: PMC10818074 DOI: 10.1016/j.jacig.2023.100204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 10/12/2023] [Accepted: 10/30/2023] [Indexed: 01/30/2024]
Abstract
Background Research on reported food-related triggers of atopic disease in South Asian adults is lacking despite the region's large population and the global significance of allergic diseases. Objectives The study aimed to identify prevalent local food items and assess allergic sensitization rates to potential trigger foods for atopic diseases via skin prick and specific IgE testing. Methods The study began with a pilot survey of 100 subjects recruited from 4 hospitals in Hyderabad, India, focusing on foods perceived to relate to asthma, allergic rhinitis, atopic dermatitis, urticaria, and gastrointestinal allergic symptoms. A subsequent main study evaluated 2010 participants, 1754 of whom were diagnosed with an aforementioned atopic disease and who reported allergic symptoms related to any of 77 foods identified in the pilot study. Ultimately 1622 patients who consented to skin prick and specific IgE testing and who reported at least 1 food item triggering allergic diseases were included in the final analysis. Results Among 1622 patients (average age, 42.6 ± 12.9 years; 55.5% male), asthma was the most commonly diagnosed atopic disease (26.4%), with itching and rash being frequently reported symptoms (22.7%). Notably, 94.9% of patients had total serum IgE > 144 kU/L. Chickpea, cabbage, eggplant, walnut, cumin, and betel leaf were the most commonly reported trigger foods. Conclusion In this sample of South Indian adults diagnosed with allergic disease, reported food triggers were most commonly local dietary staples, while reported reactions to priority allergens like peanut and sesame were conspicuously absent. Observed concordance between patient-reported food triggers and sensitization to reported food triggers was low, highlighting the need for improved clinical evaluation of suspected triggers.
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Affiliation(s)
- Priyanka Dadha
- Center for Food Allergy & Asthma Research (CFAAR), Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Chicago, Ill
| | - Sai Nimmagadda
- Center for Food Allergy & Asthma Research (CFAAR), Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Chicago, Ill
- Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, Ill
| | - Carina Venter
- Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, Ill
- Department of Pediatrics–Allergy/Immunology, CFAAR, Chicago, Ill
| | - Ruchi Gupta
- Center for Food Allergy & Asthma Research (CFAAR), Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Chicago, Ill
- Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, Ill
| | - Putcha Uday Kumar
- Division of Pathology & Microbiology, Indian Council of Medical Research–National Institute of Nutrition, Ministry of Health and Family Welfare, Government of India, Hyderabad, Telangana, India
| | - Christopher M. Warren
- Center for Food Allergy & Asthma Research (CFAAR), Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Chicago, Ill
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Sun P, Wang Y, Liu X, Li Z, Cui D, Li Q, Wang Q, Wang J. Methylation-driven mechanisms of allergic rhinitis during pollen and non-pollen seasons using integrated bioinformatics analysis. Front Genet 2024; 15:1242974. [PMID: 38699230 PMCID: PMC11063319 DOI: 10.3389/fgene.2024.1242974] [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: 06/20/2023] [Accepted: 03/25/2024] [Indexed: 05/05/2024] Open
Abstract
Background Allergic rhinitis (AR) is a widespread allergic airway disease that results from a complex interplay between genetic and environmental factors and affects approximately 10%-40% of the global population. Pollen is a common allergen, and exposure to pollen can cause epigenetic changes. However, the mechanism underlying pollen-induced DNA methylation changes and their potential effects on the allergic march are still unclear. The purpose of this study was to explore the methylation-driven mechanisms of AR during the pollen and non-pollen seasons using bioinformatics analysis and to investigate their relationship with asthma. Methods We downloaded DNA methylation and gene expression data from the GEO database (GSE50387: GSE50222, GSE50101) and identified differentially methylated positions (DMPs) and differentially expressed genes (DEGs) during the pollen and non-pollen seasons using the CHAMP and limma packages. Through correlation analysis, we identified methylation-driven genes and performed pathway enrichment analysis to annotate their functions. We incorporated external data on AR combined with asthma (GSE101720) for analysis to identify key CpGs that promote the transformation of AR to asthma. We also utilized external data on olive pollen allergy (GSE54522) for analysis to validate the methylation-driven genes. Weighted correlation network analysis (WGCNA) was employed to identify gene modules significantly correlated with pollen allergy. We extracted genes related to the key methylation-driven gene ZNF667-AS1 from the significant module and performed pathway intelligent clustering using KOBAS-i. We also utilized gene set enrichment analysis to explore the potential function of ZNF667-AS1. Results We identified 20 and 24 CpG-Gene pairings during the pollen and non-pollen seasons. After incorporating external data from GSE101720, we found that ZNF667-AS1 is a key gene that may facilitate the transformation of AR into asthma during the pollen season. This finding was further validated in another external dataset, GSE54522, which is associated with pollen allergy. WGCNA identified 17 modules, among which the blue module showed significant correlation with allergies. ZNF667-AS1 was located in the blue module. We performed pathway analysis on the genes correlated with ZNF667-AS1 extracted from the blue module and identified a prominent cluster of pathways in the KOBAS-i results, including Toll-like receptor (TLR) family, MyD88, MAPK, and oxidative stress. Gene set enrichment analysis around cg05508084 (paired with ZNF667-AS1) also indicated its potential involvement in initiating and modulating allergic inflammation from the perspective of TLR and MAPK signaling. Conclusion We identified methylation-driven genes and their related pathways during the pollen and non-pollen seasons in patients with AR and identified key CpGs that promote the transformation of AR into asthma due to pollen exposure. This study provides new insights into the underlying molecular mechanisms of the transformation of AR to asthma.
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Affiliation(s)
- Pengcheng Sun
- College of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
- National Institute of Traditional Chinese Medicine Constitution and Preventive Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Yi Wang
- College of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
- National Institute of Traditional Chinese Medicine Constitution and Preventive Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Xing Liu
- College of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
- National Institute of Traditional Chinese Medicine Constitution and Preventive Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Zhuqing Li
- College of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
- National Institute of Traditional Chinese Medicine Constitution and Preventive Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Diankun Cui
- College of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
- National Institute of Traditional Chinese Medicine Constitution and Preventive Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Qianru Li
- Qinghai Golmud Jianqiao Hospital, Golmud, Qinghai, China
| | - Qi Wang
- National Institute of Traditional Chinese Medicine Constitution and Preventive Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Ji Wang
- National Institute of Traditional Chinese Medicine Constitution and Preventive Medicine, Beijing University of Chinese Medicine, Beijing, China
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Van Haeften S, Campbell BC, Milic A, Addison-Smith E, Al Kouba J, Huete A, Beggs PJ, Davies JM. Environmental DNA analysis of airborne poaceae (grass) pollen reveals taxonomic diversity across seasons and climate zones. ENVIRONMENTAL RESEARCH 2024; 247:117983. [PMID: 38163541 DOI: 10.1016/j.envres.2023.117983] [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: 09/18/2023] [Revised: 12/08/2023] [Accepted: 12/16/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND Grasses populate most biogeographical zones, and their diversity influences allergic sensitisation to pollen. Previously, the contribution of different Poaceae subfamilies to airborne pollen has mostly been inferred from historical herbarium records. We recently applied environmental (e)DNA metabarcoding at one subtropical site revealing that successive airborne grass pollen peaks were derived from repeated flowering of Chloridoid and Panicoid grasses over a season. This study aimed to compare spatiotemporal patterns in grass pollen exposure across seasons and climate zones. METHODS Airborne pollen concentrations across two austral pollen seasons spanning 2017-2019 at subtropical (Mutdapilly and Rocklea, Queensland) and temperate (Macquarie Park and Richmond, New South Wales) sites, were determined with a routine volumetric impaction sampler and counting by light microscopy. Poaceae rbcL metabarcode sequences amplified from daily pollen samples collected once per week were assigned to subfamily and genus using a ribosomal classifier and compared with Atlas of Living Australia sighting records. RESULTS eDNA analysis revealed distinct dominance patterns of grass pollen at various sites: Panicoid grasses prevailed in both subtropical Mutdapilly and temperate Macquarie Park, whilst Chloridoid grasses dominated the subtropical Rocklea site. Overall, subtropical sites showed significantly higher proportion of pollen from Chloridoid grasses than temperate sites, whereas the temperate sites showed a significantly higher proportion of pollen from Pooideae grasses than subtropical sites. Timing of airborne Pooid (spring), Panicoid and Chloridoid (late spring to autumn), and Arundinoid (autumn) pollen were significantly related to number of days from mid-winter. Proportions of eDNA for subfamilies correlated with distributions grass sighting records between climate zones. CONCLUSIONS eDNA analysis enabled finer taxonomic discernment of Poaceae pollen records across seasons and climate zones with implications for understanding adaptation of grasslands to climate change, and the complexity of pollen exposure for patients with allergic respiratory diseases.
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Affiliation(s)
- Shanice Van Haeften
- School of Biomedical Sciences, Centre Immunology and Infection Control and Centre for Environment, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Bradley C Campbell
- School of Biomedical Sciences, Centre Immunology and Infection Control and Centre for Environment, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Andelija Milic
- School of Biomedical Sciences, Centre Immunology and Infection Control and Centre for Environment, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Elizabeth Addison-Smith
- School of Biomedical Sciences, Centre Immunology and Infection Control and Centre for Environment, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Jane Al Kouba
- School of Natural Sciences, Faculty of Science and Engineering, Macquarie University, Sydney, New South Wales, Australia
| | - Alfredo Huete
- School of Life Sciences, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Paul J Beggs
- School of Natural Sciences, Faculty of Science and Engineering, Macquarie University, Sydney, New South Wales, Australia
| | - Janet M Davies
- School of Biomedical Sciences, Centre Immunology and Infection Control and Centre for Environment, Queensland University of Technology, Brisbane, Queensland, Australia.
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Farooqi SS, Naveed S, Qamar F, Sana A, Farooqi SH, Sabir N, Mansoor A, Sadia H. Phytochemical analysis, GC-MS characterization and antioxidant activity of Hordeum vulgare seed extracts. Heliyon 2024; 10:e27297. [PMID: 38509904 PMCID: PMC10950502 DOI: 10.1016/j.heliyon.2024.e27297] [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] [Received: 08/03/2023] [Revised: 02/27/2024] [Accepted: 02/27/2024] [Indexed: 03/22/2024] Open
Abstract
Barley scientifically known as Hordeum vulgare (HV) is a major grain crop. Over the course of time, great interest has been developed in the usage of barley, because of its various pharmacological activities. Current study is designed to determine the chemical constituents of Hordeum vulgare (HV) seed extract by GC-MS technique, and Invitro antioxidant assays i.e. 1,1-diphenyl-2-picryl-hydrazyl free radical (DPPH) and 2-azino-bis(3-ethyl benzthiazoline-6-sulfonic acid) (ABTS) methods. GC-MS identified 16 non-polar compounds in the hexane extract of HV plant, which includes carboxylic acid (6.25%), fatty acid (37.5%), carboxylic acid amide derivative of fatty acid (6.25%), triterpinoids (18.75%), fat soluble vitamin (6.25%), phytosterol (6.25%), stigmastanes (6.25%), beta diketones (6.25%), and cycloartenol (6.25%) respectively. The major compound includes Hexadecanoic acid, methyl ester (6.84%), n-Hexadecanoic acid (8.58%), 9,12-Octadecanoic acid (Z,Z)-, Methyl Ester (8.04%), 9,12-Octadecadienoic acid (Z,Z) (57.01%), Lup-20(29)-en-3-one (3.57%), γ-Sitosterol (3.31%). Some constituents such as Lup-20(29)-en-3-one, campesterol and squalene were observed and were not previously reported. Total phenolic and total flavonoid content were determined using spectrophotometric technique and calculated as gallic acid equivalents GAE/g dry weight and rutin equivalent RE/g of dry weight respectively.The highest phenolic content exhibited by the acetone extract of HV seedsi.e. 0.0597 mg GAE/g while the highest flavonoid content exhibited by dichloromethane extract i.e. 0.09 mg RE/g and 0.25 mg QE/g of dry weight respectively. All the extracts showed significant antioxidant activity in DPPH and ABTS cation decolorization assays. Methanol and dichloromethane extract showed the highest DPPH radical scavenging activity i.e. 52.41% and 42.07% at the concentration of 100 mg/ml respectively. Moreover, the IC50 has been determined by the acetone and methanol extract of HV seeds. The high antioxidant activity of its seed extracts has made this plant pharmacologically important. Conclusively, there is a vast scope to further explore the active principals of barley so that more of its pharmacological properties can be identified.
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Affiliation(s)
- Saman Shahab Farooqi
- Department of Pharmaceutical Chemistry, Jinnah University for Women, Karachi, Pakistan
| | - Safila Naveed
- Department of Pharmaceutical Chemistry, University of Karachi, Karachi, Pakistan
| | - Fatima Qamar
- Department of Pharmaceutical Chemistry, Jinnah University for Women, Karachi, Pakistan
| | - Aisha Sana
- Department of Pharmaceutical Chemistry, Jinnah University for Women, Karachi, Pakistan
| | - Shahab H. Farooqi
- Department of Mathematics, Jinnah University for Women, Karachi, Pakistan
| | - Neelam Sabir
- Department of Pharmaceutical Chemistry, Jinnah University for Women, Karachi, Pakistan
| | - Asra Mansoor
- Department of Pharmaceutics, Jinnah University for Women, Karachi, Pakistan
| | - Halima Sadia
- Department of Pharmacy Practice, Jinnah University for Women, Karachi, Pakistan
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11
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Rojo J, Cervigón P, Ferencova Z, Cascón Á, Galán Díaz J, Romero-Morte J, Sabariego S, Torres M, Gutiérrez-Bustillo AM. Assessment of environmental risk areas based on airborne pollen patterns as a response to land use and land cover distribution. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 344:123385. [PMID: 38242303 DOI: 10.1016/j.envpol.2024.123385] [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: 11/08/2023] [Revised: 01/12/2024] [Accepted: 01/16/2024] [Indexed: 01/21/2024]
Abstract
Allergic respiratory diseases are considered to be among the most important public health concerns, and pollen is the main cause of allergic respiratory diseases worldwide. However, the biological component of air quality is largely underestimated, and there is an important gap in the legislation in this area. The aims of this study were to characterise the occurrence and incidence of pollen exposure in relation to potential pollen sources and to delineate the main areas of aerobiological risk in the Madrid Autonomous Region based on homogeneous patterns of pollen exposure. This study uses the historical aerobiological database of the Madrid Region Palynological Network (central Spain) from ten pollen stations from 1994 to 2022, and the land-use information from the Corine Land Cover. Multiple clustering approaches were followed to group the sampling stations and subsequently all the 1 × 1km pixels for the Madrid Autonomous Region. The clustering dendrogram for land-use distribution was compared to the dendrogram for historical airborne pollen data. The two dendrograms showed a good alignment with a very high correlation (0.95) and very low entanglement (0.15), which indicates a close correspondence between the distribution of the potential pollen sources and the airborne pollen dynamics. Based on this knowledge, the Madrid Autonomous Region was divided into six aerobiological risk areas following a clear anthropogenic gradient in terms of the potential pollen sources that determine pollen exposure in the Madrid Region. Spatial regionalisation is a common practice in environmental risk assessment to improve the application of management plans and optimise the air quality monitoring networks. The risk areas proposed by scientific criteria in the Madrid Autonomous Region can be adjusted to other operational criteria following a framework equivalent to other air quality networks.
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Affiliation(s)
- Jesús Rojo
- Department of Pharmacology, Pharmacognosy and Botany, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain.
| | - Patricia Cervigón
- Department of Pharmacology, Pharmacognosy and Botany, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain.
| | | | - Ángel Cascón
- Department of Pharmacology, Pharmacognosy and Botany, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain.
| | - Javier Galán Díaz
- Department of Pharmacology, Pharmacognosy and Botany, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain; Department of Plant Biology and Ecology, University of Sevilla, Sevilla, Spain.
| | - Jorge Romero-Morte
- Department of Pharmacology, Pharmacognosy and Botany, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain.
| | - Silvia Sabariego
- Department of Biodiversity, Ecology and Evolution, University Complutense of Madrid, Madrid, Spain.
| | - Margarita Torres
- Department of Pharmacology, Pharmacognosy and Botany, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain.
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12
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Karthik KP, Dileep A, Rajagopala S, Arun Kumar M, Dharmarajan P, Vellela J. Ayurvedic clinical decision-making methods to predict, prevent and manage childhood allergic disorders. J Ayurveda Integr Med 2024; 15:100857. [PMID: 38237455 PMCID: PMC10828817 DOI: 10.1016/j.jaim.2023.100857] [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] [Received: 11/24/2021] [Revised: 08/14/2023] [Accepted: 11/24/2023] [Indexed: 02/03/2024] Open
Abstract
Allergy is a conundrum lacking satisfactory answers despite its global prevalence. Traditional systems of medicine may contain sustainable and effective solutions for the same. For mainstreaming them, an evaluation based on the system's own methods is inevitable rather than symptom-based correlations. Atopy is a novel entity in Ayurveda, but the methods of tripartite delineation (disease pattern, disease targets and influencing factors) of novel diseases and multifactorial approach to diagnosis and management in Ayurveda can bring about comprehensiveness in collection and categorization of data regarding the entity. This in turn can make the prediction, prevention and management of the same more precise, effective and sustainable. The article provides a template for the application of Ayurvedic biological framework in the diagnosis and management of novel diseases, with special reference to childhood allergic disorders.
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Affiliation(s)
| | | | - S Rajagopala
- Department of Kaumarabhritya, All Institute of Ayurveda, India
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13
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Moten D, Batsalova T, Apostolova D, Mladenova T, Dzhambazov B, Teneva I. In Silico Design of a New Epitope-Based Vaccine against Grass Group 1 Allergens. Adv Respir Med 2023; 91:486-503. [PMID: 37987298 PMCID: PMC10660545 DOI: 10.3390/arm91060036] [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: 08/31/2023] [Revised: 10/09/2023] [Accepted: 11/06/2023] [Indexed: 11/22/2023]
Abstract
Allergic diseases are a global public health problem that affects up to 30% of the population in industrialized societies. More than 40% of allergic patients suffer from grass pollen allergy. Grass pollen allergens of group 1 and group 5 are the major allergens, since they induce allergic reactions in patients at high rates. In this study, we used immunoinformatic approaches to design an effective epitope-based vaccine against the grass group 1 allergens. After the alignment of all known pollen T-cell and B-cell epitopes from pollen allergens available in the public databases, the epitope GTKSEVEDVIPEGWKADTSY was identified as the most suitable for further analyses. The target sequence was subjected to immunoinformatics analyses to predict antigenic T-cell and B-cell epitopes. Population coverage analysis was performed for CD8+ and CD4+ T-cell epitopes. The selected T-cell epitopes (VEDVIPEGW and TKSEVEDVIPEGWKA) covered 78.87% and 98.20% of the global population and 84.57% and 99.86% of the population of Europe. Selected CD8+, CD4+ T-cell and B-cell epitopes have been validated by molecular docking analysis. CD8+ and CD4+ T-cell epitopes showed a very strong binding affinity to major histocompatibility complex (MHC) class I (MHC I) molecules and MHC class II (MHC II) molecules with global energy scores of -72.1 kcal/mol and -89.59 kcal/mol, respectively. The human IgE-Fc (PDB ID 4J4P) showed a lower affinity with B-cell epitope (ΔG = -34.4 kcal/mol), while the Phl p 2-specific human IgE Fab (PDB ID 2VXQ) had the lowest binding with the B-cell epitope (ΔG = -29.9 kcal/mol). Our immunoinformatics results demonstrated that the peptide GTKSEVEDVIPEGWKADTSY could stimulate the immune system and we performed ex vivo tests showed that the investigated epitope activates T cells isolated from patients with grass pollen allergy, but it is not recognized by IgE antibodies specific for grass pollen allergens. This confirms the importance of such studies to establish universal epitopes to serve as a basis for developing an effective vaccine against a particular group of allergens. Further in vivo studies are needed to validate the effectiveness of such a vaccine against grass pollen allergens.
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Affiliation(s)
- Dzhemal Moten
- Department of Developmental Biology, Faculty of Biology, Paisii Hilendarski University of Plovdiv, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria; (D.M.); (T.B.); (D.A.); (B.D.)
| | - Tsvetelina Batsalova
- Department of Developmental Biology, Faculty of Biology, Paisii Hilendarski University of Plovdiv, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria; (D.M.); (T.B.); (D.A.); (B.D.)
| | - Desislava Apostolova
- Department of Developmental Biology, Faculty of Biology, Paisii Hilendarski University of Plovdiv, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria; (D.M.); (T.B.); (D.A.); (B.D.)
| | - Tsvetelina Mladenova
- Department of Botany and Biological Education, Faculty of Biology, Paisii Hilendarski University of Plovdiv, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria;
| | - Balik Dzhambazov
- Department of Developmental Biology, Faculty of Biology, Paisii Hilendarski University of Plovdiv, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria; (D.M.); (T.B.); (D.A.); (B.D.)
| | - Ivanka Teneva
- Department of Botany and Biological Education, Faculty of Biology, Paisii Hilendarski University of Plovdiv, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria;
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14
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Ortega-Rosas CI, Gutiérrez-Ruacho OG, Brito-Castillo L, Calderón-Ezquerro MC, Guerrero-Guerra C, Amaya-García V. Five-year airborne pollen calendar for a Sonoran Desert city and the relationships with meteorological variability. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2023; 67:1853-1868. [PMID: 37718383 DOI: 10.1007/s00484-023-02546-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 08/04/2023] [Accepted: 08/20/2023] [Indexed: 09/19/2023]
Abstract
Aerobiological studies are still scarce in northwestern Mexico where allergenic pollen have great impacts on health. Current global pollution and climate change problems are closely related to many allergic diseases, enhancing the need to continue researching these issues and improve life quality. This study provides the first Pollen Calendar for Hermosillo, Sonora, México. Airborne pollen were continuously collected for 5 years (2015-2019). The standardized methodology with a Hirst-type spore trap proposed for global aerobiological studies was used. Weather data were also taken from a station located in the city and used to explore correlations between climate and airborne pollen concentrations in different seasons. The most important pollen taxa recorded in air belongs to herbaceous pollen, such as Poaceae, Ambrosia, Asteraceae, Chenopodiaceae-Amaranthaceae, and some shrub trees typical of this arid region, such as Nyctaginaceae, Prosopis, Parkinsonia, and Fabaceae. The most critical herbaceous pollen related to allergies have a long mean pollen season throughout the years, and the most critical periods with high pollen concentration in air occur in two seasons, spring (March-April) and summer-fall (August-October). In these 5 years, the correlation analyses for these two peaks indicate that a link exists between pollen in the air and decreases in precipitation and temperatures, and an increase in relative humidity. An inter-annual variability in pollen concentrations was recorded related to different weather conditions. Although pollen calendars are location-specific, they are useful for future research on biological air quality scenarios in different cities. Using this standardized method for other regions can provide pollen calendars that have been proven clinically important in allergic disease management worldwide.
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Affiliation(s)
- C I Ortega-Rosas
- Cuerpo Académico de Recursos Naturales, Licenciatura en Ecología, Unidad Académica Hermosillo, Universidad Estatal de Sonora, Ley Federal del Trabajo S.N. Col. Apolo. Hermosillo, C.P. 83100, Sonora, Mexico.
| | - O G Gutiérrez-Ruacho
- Cuerpo Académico de Recursos Naturales, Licenciatura en Ecología, Unidad Académica Hermosillo, Universidad Estatal de Sonora, Ley Federal del Trabajo S.N. Col. Apolo. Hermosillo, C.P. 83100, Sonora, Mexico
| | - L Brito-Castillo
- Centro de Investigaciones Biológicas del Noroeste S.C., Guaymas, Sonora, Mexico
| | - M C Calderón-Ezquerro
- Red Mexicana de Aerobiología, Instituto de Ciencias de La Atmósfera Y Cambio Climático, UNAM, Mexico City, Mexico
| | - C Guerrero-Guerra
- Red Mexicana de Aerobiología, Instituto de Ciencias de La Atmósfera Y Cambio Climático, UNAM, Mexico City, Mexico
| | - V Amaya-García
- Cuerpo Académico de Recursos Naturales, Licenciatura en Ecología, Unidad Académica Hermosillo, Universidad Estatal de Sonora, Ley Federal del Trabajo S.N. Col. Apolo. Hermosillo, C.P. 83100, Sonora, Mexico
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15
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Correa A, Miranda J, Oliveira L, Moreira P, Vieira F, Cunha-Junior J, Resende R, Taketomi E. Identification of carboxymethyl (CM)-binding proteins derived from Lolium multiflorum pollen extract and antibody reactivity in Brazilian allergic patients. Braz J Med Biol Res 2023; 56:e12957. [PMID: 37851792 PMCID: PMC10578120 DOI: 10.1590/1414-431x2023e12957] [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: 06/19/2023] [Accepted: 08/18/2023] [Indexed: 10/20/2023] Open
Abstract
Lolium multiflorum grass is the major pollen allergen source in the southern region of Brazil, but most of its allergens remain poorly characterized. The aim of this study was to investigate antibody reactivity to L. multiflorum crude and carboxymethyl-ligand extracts in allergic patients and healthy individuals. Ion exchange carboxymethyl (CM) chromatography (CM-Sepharose) was used to isolate proteins (S2) from L. multiflorum crude extract (S1), which were assessed by SDS-PAGE. S1- and S2-specific IgE and IgG4 levels were measured by ELISA using sera from 55 atopic and 16 non-atopic subjects. Reactive polypeptide bands in S1 and S2 were detected by immunoblotting, and the most prominent bands in S2 were analyzed by mass spectrometry (MS-MS). Similar IgE and IgG4 levels were observed to both S1 (IgE median absorbance: 1.22; IgG4 median absorbance: 0.68) and S2 (IgE median absorbance: 1.26; IgG4 median absorbance: 0.85) in atopic subjects. S1 and S2 had positive correlations for IgE and IgG4 (IgE: r=0.9567; IgG4: r=0.9229; P<0.0001) levels. Homology between S1 and S2 was confirmed by IgE (84%) and IgG4 (83%) inhibition. Immunoblotting revealed that the 29-32 kDa band was recognized by 100% of atopic subjects in both S1 and S2. MS-MS analysis identified similarity profile to groups 1 and 5 grass allergens. This study revealed that carboxymethyl-ligand fraction played an important role for pollen allergy diagnosis by containing clinically relevant allergens and constituted a promising candidate for allergen-specific immunotherapy.
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Affiliation(s)
- A.S. Correa
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
| | - J.S. Miranda
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
| | - L.A.R. Oliveira
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
| | - P.F.S. Moreira
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
| | - F.A.M. Vieira
- Departamento de Medicina, Universidade de Caxias do Sul, Caxias do Sul, RS, Brasil
| | - J.P. Cunha-Junior
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
| | - R.O. Resende
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
- Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ, Brasil
| | - E.A. Taketomi
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
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16
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Manzanares B, González R, Serrano P, Navas A, Alonso C, Fernandez L, Jurado A, Moreno-Aguilar C. Back to basics: likelihood ratios for olive and grass pollen specific IgE in seasonal allergic rhinitis. FRONTIERS IN ALLERGY 2023; 4:1241650. [PMID: 37859976 PMCID: PMC10582635 DOI: 10.3389/falgy.2023.1241650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 09/18/2023] [Indexed: 10/21/2023] Open
Abstract
Introduction Specific IgE (sIgE) is merely a sensitization marker that cannot be used for allergy diagnosis if there are no associated clinical symptoms. As of 2023, there is still no evidence regarding the quantity of sIgE necessary to confirm or exclude clinical disease. Therefore, this study aimed to calculate cut-offs for sIgE, allowing us to effectively diagnose olive or grass pollen allergy and select allergenic immunotherapy (AIT) candidate patients in a region under high olive and grass allergenic pressure. Methods An observational retrospective study consisting of the review of electronic medical records from 1,172 patients diagnosed with seasonal rhino-conjunctivitis and suspected allergy to olive or grass pollen. Symptoms correlated with sIgE to Poaceae and Oleaceae whole extracts and sIgE to genuine allergenic components were evaluated. Optimal cut-off values were calculated using receiver operating characteristic curves. Relevant clinical symptoms and AIT indications were taken into consideration when determining the clinical allergy diagnosis. Results sIgE to Lolium showed the best area under the curve (AUC) for both diagnosis (0.957) and an indication of AIT (0.872). The optimal cut-off values for grass diagnosis and AIT indication were 1.79 kUA/L and 8.83 kUA/L, respectively. A value of 5.62 kUA/L was associated with a positive likelihood ratio (LR) of 10.08 set for grass allergy. Olea sIgE showed the best AUC for the diagnosis (0.950). The optimal cut-off for diagnosis was 2.41 kUA/L. A value of 6.49 kUA/L was associated with a positive LR of 9.98 to confirm olive pollen allergy. In regard to immunotherapy, Ole e 1 sIgE showed the best AUC (0.860). The optimal cut-off was 14.05 kUA/L. Ole e 1 sIgE value of 4.8 kUA/L was associated with a 0.09 negative LR to exclude olive AIT indication. Conclusions The sIgE cut-offs found in this population under high olive and grass allergenic pressure reduce the gap between sensitization and clinical allergy, providing a new tool for the diagnosis of seasonal allergic rhinitis/asthma and helping to discriminate patients who will benefit from AIT.
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Affiliation(s)
- Bárbara Manzanares
- Maimonides Biomedical Research Institute of Córdoba (IMIBIC), Reina Sofia University Hospital/ University of Córdoba, Córdoba, Spain
- Department of Immunology and Allergy, Reina Sofia University Hospital, Córdoba, Spain
- Postdocs CSYF, Code RH-0060-2020, European Social Fund, Sevilla, Spain
| | - Rafael González
- Maimonides Biomedical Research Institute of Córdoba (IMIBIC), Reina Sofia University Hospital/ University of Córdoba, Córdoba, Spain
- Department of Immunology and Allergy, Reina Sofia University Hospital, Córdoba, Spain
- National Network ARADyAL, Health Institute Carlos III, Madrid, Spain
| | - Pilar Serrano
- Maimonides Biomedical Research Institute of Córdoba (IMIBIC), Reina Sofia University Hospital/ University of Córdoba, Córdoba, Spain
- Department of Immunology and Allergy, Reina Sofia University Hospital, Córdoba, Spain
- National Network ARADyAL, Health Institute Carlos III, Madrid, Spain
| | - Ana Navas
- Maimonides Biomedical Research Institute of Córdoba (IMIBIC), Reina Sofia University Hospital/ University of Córdoba, Córdoba, Spain
- Department of Immunology and Allergy, Reina Sofia University Hospital, Córdoba, Spain
| | - Corona Alonso
- Maimonides Biomedical Research Institute of Córdoba (IMIBIC), Reina Sofia University Hospital/ University of Córdoba, Córdoba, Spain
- Department of Immunology and Allergy, Reina Sofia University Hospital, Córdoba, Spain
| | - Lourdes Fernandez
- Maimonides Biomedical Research Institute of Córdoba (IMIBIC), Reina Sofia University Hospital/ University of Córdoba, Córdoba, Spain
- Department of Immunology and Allergy, Reina Sofia University Hospital, Córdoba, Spain
| | - Aurora Jurado
- Maimonides Biomedical Research Institute of Córdoba (IMIBIC), Reina Sofia University Hospital/ University of Córdoba, Córdoba, Spain
- Department of Immunology and Allergy, Reina Sofia University Hospital, Córdoba, Spain
- National Network ARADyAL, Health Institute Carlos III, Madrid, Spain
| | - Carmen Moreno-Aguilar
- Maimonides Biomedical Research Institute of Córdoba (IMIBIC), Reina Sofia University Hospital/ University of Córdoba, Córdoba, Spain
- Department of Immunology and Allergy, Reina Sofia University Hospital, Córdoba, Spain
- National Network ARADyAL, Health Institute Carlos III, Madrid, Spain
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17
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Jarupund P, Jantrakulroj P, Suwanphakdee C, Sinthuvanich C. A Pilot Study to Identify Grass Species That Mediate Pollen Allergy in Thailand. Int Arch Allergy Immunol 2023; 184:875-881. [PMID: 37402353 DOI: 10.1159/000530976] [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: 03/06/2023] [Accepted: 04/28/2023] [Indexed: 07/06/2023] Open
Abstract
INTRODUCTION Some grass species that are either common or widely spread in Thailand have not been used for pollen allergy diagnosis. In order to improve diagnostic accuracy, the aim of this pilot study was to identify the grass species responsible for pollen allergy in Thailand. METHODS The skin sensitization of pollen extracts from six different grass species, including rice (Oryza sativa), corn (Zea mays), sorghum (Sorghum bicolor), para grass (Urochloa mutica), ruzi grass (Urochloa eminii), and green panic grass (Megathyrsus maximus), was evaluated by skin prick test (SPT). Serum's IgE specific to each pollen extract was analyzed by Western blot (WB). The ImmunoCAPTM test for Johnson grass was also evaluated. RESULTS Of the thirty-six volunteers who participated in this study, eighteen tested positive for at least one of the diagnostic tests, namely SPT, WB analysis, or ImmunoCAPTM. Notably, skin reactivity to para grass, corn, sorghum, and rice was more commonly observed compared to ruzi grass and green panic grass. However, in the WB analysis, individuals with pollen-specific IgE were more frequently detected in sorghum, green panic grass, corn, rice, and ruzi grass than para grass. CONCLUSION In this pilot investigation, our findings indicate that the pollen extracts of rice, corn, sorghum, and para grass are associated with pollen allergy in Thailand. These results contribute to the current knowledge on the identification of grass species that are associated with pollen allergy in Thailand and Southeast Asia.
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Affiliation(s)
- Pakawat Jarupund
- Department of Botany, Faculty of Science, Kasetsart University, Bangkok, Thailand
| | | | | | - Chomdao Sinthuvanich
- Department of Biochemistry, Faculty of Science, Kasetsart University, Bangkok, Thailand
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18
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Frisk CA, Apangu GP, Petch GM, Creer S, Hanson M, Adams-Groom B, Skjøth CA. Microscale pollen release and dispersal patterns in flowering grass populations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 880:163345. [PMID: 37028666 DOI: 10.1016/j.scitotenv.2023.163345] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/17/2023] [Accepted: 04/03/2023] [Indexed: 05/27/2023]
Abstract
Characterizing pollen release and dispersion processes is fundamental for knowledge advancement in ecological, agricultural and public health disciplines. Understanding pollen dispersion from grass communities is especially relevant due to their high species-specific allergenicity and heterogeneously distributed source areas. Here, we aimed to address questions concerning fine level heterogeneity in grass pollen release and dispersion processes, with a focus on characterizing the taxonomic composition of airborne grass pollen over the grass flowering season using eDNA and molecular ecology methods. High resolution grass pollen concentrations were compared between three microscale sites (<300 m apart) in a rural area in Worcestershire, UK. The grass pollen was modelled with local meteorology in a MANOVA (Multivariate ANOVA) approach to investigate factors relevant to pollen release and dispersion. Simultaneously, airborne pollen was sequenced using Illumina MySeq for metabarcoding, analysed against a reference database with all UK grasses using the R packages DADA2 and phyloseq to calculate Shannon's Diversity Index (α-diversity). The flowering phenology of a local Festuca rubra population was observed. We found that grass pollen concentrations varied on a microscale level, likely attributed to local topography and the dispersion distance of pollen from flowering grasses in local source areas. Six genera (Agrostis, Alopecurus, Arrhenatherum, Holcus, Lolium and Poa) dominated the pollen season, comprising on average 77 % of the relative abundance of grass species reads. Temperature, solar radiation, relative humidity, turbulence and wind speeds were found to be relevant for grass pollen release and dispersion processes. An isolated flowering Festuca rubra population contributed almost 40 % of the relative pollen abundance adjacent to the nearby sampler, but only contributed 1 % to samplers situated 300 m away. This suggests that most emitted grass pollen has limited dispersion distance and our results show substantial variation in airborne grass species composition over short geographical scales.
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Affiliation(s)
- Carl A Frisk
- School of Science and the Environment, University of Worcester, Henwick Grove, WR2 6AJ Worcester, UK.
| | - Godfrey P Apangu
- School of Science and the Environment, University of Worcester, Henwick Grove, WR2 6AJ Worcester, UK
| | - Geoffrey M Petch
- School of Science and the Environment, University of Worcester, Henwick Grove, WR2 6AJ Worcester, UK
| | - Simon Creer
- Molecular Ecology and Evolution Group, School of Natural Sciences, Bangor University, LL57 2UW Bangor, UK
| | - Mary Hanson
- School of Science and the Environment, University of Worcester, Henwick Grove, WR2 6AJ Worcester, UK
| | - Beverley Adams-Groom
- School of Science and the Environment, University of Worcester, Henwick Grove, WR2 6AJ Worcester, UK
| | - Carsten A Skjøth
- School of Science and the Environment, University of Worcester, Henwick Grove, WR2 6AJ Worcester, UK
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19
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Krinitsina AA, Omelchenko DO, Kasianov AS, Karaseva VS, Selezneva YM, Chesnokova OV, Shirobokov VA, Polevova SV, Severova EE. Aerobiological Monitoring and Metabarcoding of Grass Pollen. PLANTS (BASEL, SWITZERLAND) 2023; 12:2351. [PMID: 37375978 DOI: 10.3390/plants12122351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/08/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023]
Abstract
Grass pollen is one of the leading causes of pollinosis, affecting 10-30% of the world's population. The allergenicity of pollen from different Poaceae species is not the same and is estimated from moderate to high. Aerobiological monitoring is a standard method that allows one to track and predict the dynamics of allergen concentration in the air. Poaceae is a stenopalynous family, and thus grass pollen can usually be identified only at the family level with optical microscopy. Molecular methods, in particular the DNA barcoding technique, can be used to conduct a more accurate analysis of aerobiological samples containing the DNA of various plant species. This study aimed to test the possibility of using the ITS1 and ITS2 nuclear loci for determining the presence of grass pollen from air samples via metabarcoding and to compare the analysis results with the results of phenological observations. Based on the high-throughput sequencing data, we analyzed the changes in the composition of aerobiological samples taken in the Moscow and Ryazan regions for three years during the period of active flowering of grasses. Ten genera of the Poaceae family were detected in airborne pollen samples. The representation for most of them for ITS1 and ITS2 barcodes was similar. At the same time, in some samples, the presence of specific genera was characterized by only one sequence: either ITS1 or ITS2. Based on the analysis of the abundance of both barcode reads in the samples, the following order could describe the change with time in the dominant species in the air: Poa, Alopecurus, and Arrhenatherum in early mid-June, Lolium, Bromus, Dactylis, and Briza in mid-late June, Phleum, Elymus in late June to early July, and Calamagrostis in early mid-July. In most samples, the number of taxa found via metabarcoding analysis was higher compared to that in the phenological observations. The semi-quantitative analysis of high-throughput sequencing data well reflects the abundance of only major grass species at the flowering stage.
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Affiliation(s)
- Anastasia A Krinitsina
- Department of Higher Plants, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Denis O Omelchenko
- Laboratory of Plant Genomics, Institute for Information Transmission Problems, 127051 Moscow, Russia
| | - Artem S Kasianov
- Laboratory of Plant Genomics, Institute for Information Transmission Problems, 127051 Moscow, Russia
| | - Vera S Karaseva
- Department of Biology, Institute of Natural Science, S.A. Esenin Ryazan State University, 390000 Ryazan, Russia
| | - Yulia M Selezneva
- Department of Biology, Institute of Natural Science, S.A. Esenin Ryazan State University, 390000 Ryazan, Russia
| | - Olga V Chesnokova
- Department of Higher Plants, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Vitaly A Shirobokov
- Department of Higher Plants, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Svetlana V Polevova
- Department of Higher Plants, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Elena E Severova
- Department of Higher Plants, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
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20
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Biagioni B, Cecchi L, D'Amato G, Annesi-Maesano I. Environmental influences on childhood asthma: Climate change. Pediatr Allergy Immunol 2023; 34:e13961. [PMID: 37232282 DOI: 10.1111/pai.13961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 05/03/2023] [Indexed: 05/27/2023]
Abstract
Climate change is a key environmental factor for allergic respiratory diseases, especially in childhood. This review describes the influences of climate change on childhood asthma considering the factors acting directly, indirectly and with their amplifying interactions. Recent findings on the direct effects of temperature and weather changes, as well as the influences of climate change on air pollution, allergens, biocontaminants and their interplays, are discussed herein. The review also focusses on the impact of climate change on biodiversity loss and on migration status as a model to study environmental effects on childhood asthma onset and progression. Adaptation and mitigation strategies are urgently needed to prevent further respiratory diseases and human health damage in general, especially in younger and future generations.
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Affiliation(s)
- Benedetta Biagioni
- Allergy and Clinical Immunology Unit, San Giovanni di Dio Hospital, Florence, Italy
| | - Lorenzo Cecchi
- Centre of Bioclimatology, University of Florence, Florence, Italy
- SOS Allergy and Clinical Immunology, USL Toscana Centro, Prato, Italy
| | - Gennaro D'Amato
- Division of Respiratory Diseases and Allergy AORN Cardarelli and University of Naples, Federico II, Naples, Italy
| | - Isabella Annesi-Maesano
- Department of Allergic and Respiratory Diseases, Montpellier University Hospital, Institute Desbrest of Epidemiology and Public Health, University of Montpellier and INSERM, Montpellier, France
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21
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Frisk CA, Adams-Groom B, Smith M. Isolating the species element in grass pollen allergy: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 883:163661. [PMID: 37094678 DOI: 10.1016/j.scitotenv.2023.163661] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 05/03/2023]
Abstract
Grass pollen is a leading cause of allergy in many countries, particularly Europe. Although many elements of grass pollen production and dispersal are quite well researched, gaps still remain around the grass species that are predominant in the air and which of those are most likely to trigger allergy. In this comprehensive review we isolate the species aspect in grass pollen allergy by exploring the interdisciplinary interdependencies between plant ecology, public health, aerobiology, reproductive phenology and molecular ecology. We further identify current research gaps and provide open ended questions and recommendations for future research in an effort to focus the research community to develop novel strategies to combat grass pollen allergy. We emphasise the role of separating temperate and subtropical grasses, identified through divergence in evolutionary history, climate adaptations and flowering times. However, allergen cross-reactivity and the degree of IgE connectivity in sufferers between the two groups remains an area of active research. The importance of future research to identify allergen homology through biomolecular similarity and the connection to species taxonomy and practical implications of this to allergenicity is further emphasised. We also discuss the relevance of eDNA and molecular ecological techniques (DNA metabarcoding, qPCR and ELISA) as important tools in quantifying the connection between the biosphere with the atmosphere. By gaining more understanding of the connection between species-specific atmospheric eDNA and flowering phenology we will further elucidate the importance of species in releasing grass pollen and allergens to the atmosphere and their individual role in grass pollen allergy.
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Affiliation(s)
- Carl A Frisk
- Department of Urban Greening and Vegetation Ecology, Norwegian Institute of Bioeconomy Research, Ås, Norway.
| | - Beverley Adams-Groom
- School of Science and the Environment, University of Worcester, Worcester, United Kingdom
| | - Matt Smith
- School of Science and the Environment, University of Worcester, Worcester, United Kingdom
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22
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McKenzie CI, Varese N, Aui PM, Reinwald S, Wines BD, Hogarth PM, Thien F, Hew M, Rolland JM, O'Hehir RE, van Zelm MC. RNA sequencing of single allergen-specific memory B cells after grass pollen immunotherapy: Two unique cell fates and CD29 as a biomarker for treatment effect. Allergy 2023; 78:822-835. [PMID: 36153670 PMCID: PMC10952829 DOI: 10.1111/all.15529] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 08/26/2022] [Accepted: 08/29/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Sublingual immunotherapy (SLIT) for grass pollen allergy can modify the natural history of allergic rhinitis and is associated with increased allergen-specific IgG4 . IgG4 competitively inhibits functional IgE on the surface of effector cells, such as mast cells and basophils, from binding to allergens. To further understand the important role memory B-cell (Bmem) responses play in mediating the beneficial effects of SLIT, we assessed changes in allergen-specific Bmem subsets induced by SLIT for grass pollen allergy. METHODS Blood samples were collected twice outside the pollen season from twenty-seven patients with sensitization to ryegrass pollen (RGP; Lolium perenne) and seasonal rhinoconjunctivitis. Thirteen received 4-month pre-seasonal SLIT for grass pollen allergy, and 14 received standard pharmacotherapy only. Single-cell RNA sequencing was performed on FACS-purified Lol p 1-specific Bmem before and after SLIT from four patients, and significant genes were validated by flow cytometry on the total cohort. RESULTS Four months of SLIT increased RGP-specific IgE and IgG4 in serum and induced two Lol p 1-specific Bmem subsets with unique transcriptional profiles. Both subsets had upregulated expression of beta 1 integrin ITGB1 (CD29), whereas IGHE (IgE), IGHG4 (IgG4 ), FCER2 (CD23), and IL13RA1 were upregulated in one subset. There was an increase in the proportion of Lol p 1+ Bmem expressing surface IgG4 , CD23, and CD29 after SLIT. CONCLUSIONS A clinically successful 4 months course of SLIT for grass pollen allergy induces two transcriptionally unique Bmem fates. Associated changes in surface-expressed proteins on these Bmem subsets can be used as early biomarkers for treatment effects.
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Affiliation(s)
- Craig I. McKenzie
- Department of Immunology and Pathology, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Nirupama Varese
- Department of Immunology and Pathology, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
- Department of Allergy, Immunology and Respiratory Medicine, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Pei Mun Aui
- Department of Immunology and Pathology, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Simone Reinwald
- Department of Immunology and Pathology, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
- Department of Allergy, Immunology and Respiratory Medicine, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Bruce D. Wines
- Department of Immunology and Pathology, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
- Immune Therapies GroupBurnet InstituteMelbourneVictoriaAustralia
- Department of PathologyThe University of MelbourneParkvilleVictoriaAustralia
| | - P. Mark Hogarth
- Department of Immunology and Pathology, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
- Immune Therapies GroupBurnet InstituteMelbourneVictoriaAustralia
- Department of PathologyThe University of MelbourneParkvilleVictoriaAustralia
| | - Francis Thien
- Respiratory Medicine, Eastern HealthBox Hill and Monash UniversityMelbourneVictoriaAustralia
| | - Mark Hew
- School of Public Health and Preventive MedicineMonash UniversityMelbourneVictoriaAustralia
- Allergy, Asthma and Clinical ImmunologyAlfred HealthMelbourneVictoriaAustralia
| | - Jennifer M. Rolland
- Department of Immunology and Pathology, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
- Department of Allergy, Immunology and Respiratory Medicine, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Robyn E. O'Hehir
- Department of Immunology and Pathology, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
- Department of Allergy, Immunology and Respiratory Medicine, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
- Allergy, Asthma and Clinical ImmunologyAlfred HealthMelbourneVictoriaAustralia
| | - Menno C. van Zelm
- Department of Immunology and Pathology, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
- Allergy, Asthma and Clinical ImmunologyAlfred HealthMelbourneVictoriaAustralia
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Lara B, Rojo J, Costa AR, Burgos-Montero AM, Antunes CM, Pérez-Badia R. Atmospheric pollen allergen load and environmental patterns in central and southwestern Iberian Peninsula. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159630. [PMID: 36280057 DOI: 10.1016/j.scitotenv.2022.159630] [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: 07/10/2022] [Revised: 09/17/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
Over one quarter of the population in industrialised countries suffers from some type of allergy and inhaled aeroallergens from pollen are the primary cause of allergic ailments. The networks for monitoring biological air quality measure the airborne pollen concentrations that characterize periods of exposure to major airborne aeroallergens but there are certain discrepancies in relation to the allergen-pollen dynamic. In this paper we analyse the airborne allergens Ole e 1, Phl p 1, Phl p 5 and Pla a 1, and interpreted the adjustments and mismatches in their concentrations in relation to airborne pollen. The influence of main environmental patterns was considered. The study was conducted in two urban areas of the centre and southwest of the Iberian Peninsula (Toledo in Spain and Évora in Portugal). Monitoring for pollen followed the standard protocol using Hirst volumetric spore traps and allergenic particles were quantified by ELISA assay. The results indicate that the discrepancies in this relationship were affected by the weather conditions up to 6 days prior. Precipitation and humidity above normal values caused a higher concentration of the allergen Pla a 1. This effect occurred in reverse in the case of humidity for the allergens Ole e 1 and Phl p 1. Humidity and precipitation generated the same pattern in the allergen-pollen relationship in both Phl p 1 and Phl p 5. Our findings show consistent results that allow to interpret the rate of discrepancy between allergen and pollen, and it can be used to improve allergy risk prediction models generated from atmospheric pollen.
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Affiliation(s)
- Beatriz Lara
- Institute of Environmental Science. University of Castilla-La Mancha. 45071, Toledo, Spain; Department of Chemical and Environmental Engineering. Polytechnic University of Cartagena. 30202, Cartagena, Spain
| | - Jesús Rojo
- Department of Pharmacology, Pharmacognosy and Botany. Complutense University. 28040, Madrid, Spain
| | - Ana R Costa
- Department of Chemistry, ICT-Institute of Earth Sciences, School of Sciences and Technology & IIFA. University of Évora. 7000-671, Évora, Portugal
| | - Ana M Burgos-Montero
- Institute of Environmental Science. University of Castilla-La Mancha. 45071, Toledo, Spain; Allergy Department. Hospital General La Mancha Centro. 13600 Alcázar de San Juan, Ciudad Real, Spain
| | - Célia M Antunes
- Department of Chemistry, ICT-Institute of Earth Sciences, School of Sciences and Technology & IIFA. University of Évora. 7000-671, Évora, Portugal
| | - Rosa Pérez-Badia
- Institute of Environmental Science. University of Castilla-La Mancha. 45071, Toledo, Spain.
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24
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Weichwald C, Zettl I, Ellinger I, Niespodziana K, Waltl EE, Villazala-Merino S, Ivanov D, Eckl-Dorna J, Niederberger-Leppin V, Valenta R, Flicker S. Antibody Conjugates Bispecific for Pollen Allergens and ICAM-1 with Potential to Prevent Epithelial Allergen Transmigration and Rhinovirus Infection. Int J Mol Sci 2023; 24:ijms24032725. [PMID: 36769047 PMCID: PMC9917280 DOI: 10.3390/ijms24032725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/13/2023] [Accepted: 01/20/2023] [Indexed: 02/04/2023] Open
Abstract
Allergy and rhinovirus (RV) infections are major triggers for rhinitis and asthma, causing a socioeconomic burden. As RVs and allergens may act synergistically to promote airway inflammation, simultaneous treatment strategies for both causative agents would be innovative. We have previously identified the transmembrane glycoprotein intercellular adhesion molecule 1 (ICAM-1) as an anchor for antibody conjugates bispecific for ICAM-1 and Phleum pratense (Phl p) 2, a major grass pollen allergen, to block allergen transmigration through the epithelial barrier. Since ICAM-1 is a receptor for the major group RVs, we speculated that our bispecific antibody conjugates may protect against RV infection. Therefore, we created antibody conjugates bispecific for ICAM-1 and the major grass pollen allergen Phl p 5 and analyzed their capacity to affect allergen penetration and RV infection. Bispecific antibody conjugates significantly reduced the trans-epithelial migration of Phl p 5 and thus the basolateral Phl p 5 concentration and allergenic activity as determined by humanized rat basophilic leukemia cells and inhibited RV infection of cultured epithelial cells. A reduction in allergenic activity was obtained only through the prevention of allergen transmigration because the Phl p 5-specific IgG antibody did not block the allergen-IgE interaction. Our results indicate the potential of allergen/ICAM-1-specific antibody conjugates as a topical treatment strategy for allergy and RV infections.
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Affiliation(s)
- Christina Weichwald
- Division of Immunopathology, Institute for Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
| | - Ines Zettl
- Division of Immunopathology, Institute for Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
| | - Isabella Ellinger
- Division of Cellular and Molecular Pathophysiology, Institute for Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
| | - Katarzyna Niespodziana
- Division of Immunopathology, Institute for Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
| | - Eva E. Waltl
- Department of Otorhinolaryngology, Medical University of Vienna, 1090 Vienna, Austria
| | | | - Daniel Ivanov
- Division of Immunopathology, Institute for Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
| | - Julia Eckl-Dorna
- Department of Otorhinolaryngology, Medical University of Vienna, 1090 Vienna, Austria
| | | | - Rudolf Valenta
- Division of Immunopathology, Institute for Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
- Karl Landsteiner University of Health Sciences, 3500 Krems, Austria
- National Research Centre (NRC) Institute of Immunology Federal Medical-Biological Agency (FMBA) of Russia, 115478 Moscow, Russia
- Laboratory for Immunopathology, Department of Clinical Immunology and Allergy, Sechenov First Moscow State Medical University, 119435 Moscow, Russia
| | - Sabine Flicker
- Division of Immunopathology, Institute for Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090 Vienna, Austria
- Correspondence: ; Tel.: +43-1-40400-51150
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25
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Fernández-González M, Ribeiro H, Rodríguez-Rajo FJ, Cruz A, Abreu I. Short-Term Exposure of Dactylis glomerata Pollen to Atmospheric Gaseous Pollutants Is Related to an Increase in IgE Binding in Patients with Grass Pollen Allergies. PLANTS (BASEL, SWITZERLAND) 2022; 12:76. [PMID: 36616204 PMCID: PMC9823458 DOI: 10.3390/plants12010076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/07/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
The concentrations of nitrogen dioxide (NO2) and tropospheric ozone (O3) in urban and industrial site atmospheres are considered key factors associated with pollen-related respiratory allergies. This work studies the effects of NO2 and O3 on the protein expression profile and IgE binding in patients with grass allergies to Dactylis glomerata pollen extracts. Pollens were collected during the flowering season and were exposed to NO2 and O3 in a controlled environmental chamber. The amount of soluble protein was examined using the Bradford method, and the protein expression profile and antigenic properties were analysed using the immunoblotting and enzyme-linked immunosorbent assay (ELISA), respectively. Our results showed apparent inter-sera differences concerning the number and intensity of IgE reactivity, with the most prominent at bands of 55 kDa, 35, 33, and 13 kDa. In the 13 kDa band, both gases tend to induce an increase in IgE binding, the band at 33 kDa showed a tendency towards a reduction, particularly pollen exposed to O3. Reactive bands at 55 and 35 kDa presented an increase in the IgE binding pattern for all the patient sera samples exposed to NO2, but the samples exposed to O3 showed an increase in some sera and in others a decrease. Regarding the ELISA results, out of the 21 tested samples, only 9 showed a statistically significant increase in total IgE reactivity after pollen exposure to the pollutants. Our study revealed that although airborne pollen allergens might be affected by air pollution, the possible impacts on allergy symptoms might vary depending on the type of pollutant and the patient's sensitisation profile.
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Affiliation(s)
- María Fernández-González
- Department of Plant Biology and Soil Sciences, Faculty of Sciences, University of Vigo, 32004 Ourense, Spain
| | - Helena Ribeiro
- Earth Sciences Institute (ICT), Pole of the Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
- Department of Geosciences, Environment and Spatial Plannings, Faculty of Sciences, University of Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
| | - Fco. Javier Rodríguez-Rajo
- Department of Plant Biology and Soil Sciences, Faculty of Sciences, University of Vigo, 32004 Ourense, Spain
| | - Ana Cruz
- Clinical Pathology Service, Immunology Laboratory Vila Nova de Gaia Hospitalar Centre, 4434-502 Vila Nova de Gaia, Portugal
| | - Ilda Abreu
- Earth Sciences Institute (ICT), Pole of the Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
- Department of Biology, Faculty of Sciences University of Porto, 4169-007 Porto, Portugal
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26
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Maya-Manzano JM, Oteros J, Rojo J, Traidl-Hoffmann C, Schmidt-Weber C, Buters J. Drivers of the release of the allergens Bet v 1 and Phl p 5 from birch and grass pollen. ENVIRONMENTAL RESEARCH 2022; 214:113987. [PMID: 35961547 DOI: 10.1016/j.envres.2022.113987] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 07/12/2022] [Accepted: 07/23/2022] [Indexed: 06/15/2023]
Abstract
The drivers affecting the Pollen Allergen Potency (PAP, amount of allergen released per pollen) are sparsely known. Betula and Poaceae airborne pollen are the two main allergenic pollen in the World. Airborne pollen and their allergens Bet v 1 and Phl p 5 were simultaneously measured from 2010 to 2015 in Davos (Switzerland) and Munich (Germany) by using volumetric traps and ChemVol cascade impactors. Daily variations in PAP were analysed in PM>10 and PM2.5-10 air fractions and generalized additive models were created to explain which factors determine PAP, including meteorological parameters and inorganic pollutants. 87.1 ± 13.9% of Bet v 1 and 88.8 ± 15.5% of Phl p 5 was detected in the fraction PM>10 where most pollen grains were collected. Significantly higher PAP for grasses (3.5 ± 1.9 pg Phl p 5/pollen grain) were observed in Munich than in Davos (2.4 ± 1.5 pg/pollen grain, p < 0.001), but not for Betula (2.5 ± 1.6 pg Bet v 1/pollen grain in Munich and 2.3 ± 1.7 in Davos, N.S.). PAP varied between days, years and location, and increased along the pollen season for Poaceae, but remaining constant for Betula. Free allergens (allergens observed in the fraction with limited pollen, PM2.5- 10) were recorded mostly at the beginning or at the end of the pollen season, being linked to higher humidity and rainy days. Also, PAP was higher when the airborne pollen concentrations increased rapidly after one day of low/moderate levels. Our findings show that pollen exposure explains allergen exposure only to a limited extend, and that day in the season, geographic location and some weather conditions need to be considered also to explain symptoms of allergic individuals.
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Affiliation(s)
- José M Maya-Manzano
- Center of Allergy & Environment (ZAUM), Member of the German Center for Lung Research (DZL), Technical University and Helmholtz Center Munich, Munich, Germany
| | - Jose Oteros
- Department of Botany, Ecology and Plant Physiology, Agrifood Campus of International Excellence CeiA3, Andalusian Inter-University Institute for Earth System IISTA, University of Cordoba, Spain.
| | - Jesús Rojo
- Department of Pharmacology, Pharmacognosy and Botany, Complutense University, Madrid, Spain
| | - Claudia Traidl-Hoffmann
- Department of Environmental Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Germany; Institute of Environmental Medicine, Helmholtz Center Munich - German Research Center for Environmental Health, Augsburg, Germany; Christine Kühne Center for Allergy Research and Education, Davos, Switzerland
| | - Carsten Schmidt-Weber
- Center of Allergy & Environment (ZAUM), Member of the German Center for Lung Research (DZL), Technical University and Helmholtz Center Munich, Munich, Germany
| | - Jeroen Buters
- Center of Allergy & Environment (ZAUM), Member of the German Center for Lung Research (DZL), Technical University and Helmholtz Center Munich, Munich, Germany
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27
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Climate Change Factors and the Aerobiology Effect. Immunol Allergy Clin North Am 2022; 42:771-786. [DOI: 10.1016/j.iac.2022.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Padayachee Y, Flicker S, Linton S, Cafferkey J, Kon OM, Johnston SL, Ellis AK, Desrosiers M, Turner P, Valenta R, Scadding GK. Review: The Nose as a Route for Therapy. Part 2 Immunotherapy. FRONTIERS IN ALLERGY 2022; 2:668781. [PMID: 35387044 PMCID: PMC8974912 DOI: 10.3389/falgy.2021.668781] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 05/28/2021] [Indexed: 12/12/2022] Open
Abstract
The nose provides a route of access to the body for inhalants and fluids. Unsurprisingly it has a strong immune defense system, with involvement of innate (e.g., epithelial barrier, muco- ciliary clearance, nasal secretions with interferons, lysozyme, nitric oxide) and acquired (e.g., secreted immunoglobulins, lymphocytes) arms. The lattice network of dendritic cells surrounding the nostrils allows rapid uptake and sampling of molecules able to negotiate the epithelial barrier. Despite this many respiratory infections, including SARS-CoV2, are initiated through nasal mucosal contact, and the nasal mucosa is a significant "reservoir" for microbes including Streptococcus pneumoniae, Neisseria meningitidis and SARS -CoV-2. This review includes consideration of the augmentation of immune defense by the nasal application of interferons, then the reduction of unnecessary inflammation and infection by alteration of the nasal microbiome. The nasal mucosa and associated lymphoid tissue (nasopharynx-associated lymphoid tissue, NALT) provides an important site for vaccine delivery, with cold-adapted live influenza strains (LAIV), which replicate intranasally, resulting in an immune response without significant clinical symptoms, being the most successful thus far. Finally, the clever intranasal application of antibodies bispecific for allergens and Intercellular Adhesion Molecule 1 (ICAM-1) as a topical treatment for allergic and RV-induced rhinitis is explained.
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Affiliation(s)
- Yorissa Padayachee
- Department of Respiratory Medicine, Faculty of Medicine, Imperial College Healthcare NHS Trust, Imperial College London, London, United Kingdom
| | - Sabine Flicker
- Center for Pathophysiology, Infectiology and Immunology, Institute of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria
| | - Sophia Linton
- Division of Allergy and Immunology, Department of Medicine, Queen's University, Kingston, ON, Canada.,Allergy Research Unit, Kingston Health Sciences Centre (KHSC), Kingston, ON, Canada
| | - John Cafferkey
- Department of Respiratory Medicine, Faculty of Medicine, Imperial College Healthcare NHS Trust, Imperial College London, London, United Kingdom
| | - Onn Min Kon
- Faculty of Medicine, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Sebastian L Johnston
- Faculty of Medicine, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Anne K Ellis
- Division of Allergy and Immunology, Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Martin Desrosiers
- Department of Otorhinolaryngologie, The University of Montreal Hospital Research Centre (CRCHUM), Montreal, QC, Canada
| | - Paul Turner
- Faculty of Medicine, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Rudolf Valenta
- Division of Immunopathology, Medical University of Vienna, Vienna, Austria
| | - Glenis Kathleen Scadding
- Royal National Ear Nose and Throat Hospital, University College London Hospitals NHS Foundation Trust, London, United Kingdom.,Division of Infection and Immunity, Faculty of Medical Sciences, University College London, London, United Kingdom
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González-Fernández E, Álvarez-López S, Garrido A, Fernández-González M, Rodríguez-Rajo FJ. Data mining assessment of Poaceae pollen influencing factors and its environmental implications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 815:152874. [PMID: 34999063 DOI: 10.1016/j.scitotenv.2021.152874] [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: 10/18/2021] [Revised: 12/29/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Poaceae pollen is highly allergenic, with a marked contribution to the pollen worldwide allergy prevalence. Pollen counts are defined by the species present in the considered area, although year-to-year oscillations may be triggered by different parameters, among which are weather conditions. Due to the predominant role of Poaceae pollen in the allergenicity in urban green areas, the aim of this study was the analysis of pollen trends and the influence of meteorology to forecast relevant variations in airborne pollen levels. The study was carried out during the 1993-2020 period in Ourense, in NW Iberian Peninsula. We used a volumetric Lanzoni VPPS 2000 trap for recording Poaceae airborne pollen grains, and meteorological daily data were obtained from the Galician Institute for Meteorology and Oceanography. The main indexes of the pollen season and their trends were calculated. A correlation analysis and 'C5.0 Decision Trees and Rule-Based Models' data mining algorithm were applied to determine the influence of meteorological conditions on pollen levels. We detected atmospheric Poaceae pollen during 139 days on average, mainly from April to August. The mean pollen grains amount recorded during the pollen season was 4608 pollen grains, with the pollen maximum peak of 276 pollen/m3 on 27 June. We found no statistically significant trends and slight slopes for the seasonal indexes, similarly to previous Poaceae studies in the same region. The calculated C5.0 model offered defined results, indicating that the combination of mean temperature above 17.46 °C and sunlight exposure higher than 12.7 h is conductive to significantly high pollen levels. The obtained results make possible the identification of risk moments during the pollen season for the activation of protective measures for sensitized population to grass pollen.
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Affiliation(s)
| | - Sabela Álvarez-López
- Department of Plant Biology and Soil Sciences, Faculty of Sciences, University of Vigo, 32004 Ourense, Spain
| | - Alejandro Garrido
- Department of Plant Biology and Soil Sciences, Faculty of Sciences, University of Vigo, 32004 Ourense, Spain
| | - María Fernández-González
- Department of Plant Biology and Soil Sciences, Faculty of Sciences, University of Vigo, 32004 Ourense, Spain.
| | - Fco Javier Rodríguez-Rajo
- Department of Plant Biology and Soil Sciences, Faculty of Sciences, University of Vigo, 32004 Ourense, Spain
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Frisk CA, Apangu GP, Petch GM, Adams-Groom B, Skjøth CA. Atmospheric transport reveals grass pollen dispersion distances. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 814:152806. [PMID: 34982985 DOI: 10.1016/j.scitotenv.2021.152806] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 12/07/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Identifying the origin of bioaerosols is of central importance in many biological disciplines, such as human health, agriculture, forestry, aerobiology and conservation. Modelling sources, transportation pathways and sinks can reveal how bioaerosols vary in the atmosphere and their environmental impact. Grass pollen are particularly important due to their widely distributed source areas, relatively high abundance in the atmosphere and high allergenicity. Currently, studies are uncertain regarding sampler representability between distance and sources for grass pollen. Using generalized linear modelling, this study aimed to analyse this relationship further by answering the question of distance-to-source area contribution. Grass pollen concentrations were compared between urban and rural locations, located 6.4 km apart, during two years in Worcestershire, UK. We isolated and refined vegetation areas at 100 m × 100 m using the 2017 CEH Crop Map and conducted atmospheric modelling using HYSPLIT to identify which source areas could contribute pollen. Pollen concentrations were then modelled with source areas and meteorology using generalized linear mixed-models with three temporal variables as random variation. We found that the Seasonal Pollen Integral for grass pollen varied between both years and location, with the urban location having higher levels. Day of year showed higher temporal variation than the diurnal or annual variables. For the urban location, grass source areas within 30 km had positive significant effects in predicting grass pollen concentrations, while source areas within 2-10 km were important for the rural one. The source area differential was likely influenced by an urban-rural gradient that caused differences in the source area contribution. Temperature had positive highly significant effects on both locations while precipitation affected only the rural location. Combining atmospheric modelling, vegetation source maps and generalized linear modelling was found to be a highly accurate tool to identify transportation pathways of bioaerosols in landscape environments.
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Affiliation(s)
- Carl A Frisk
- National Pollen and Aerobiological Research Unit, School of Science and the Environment, University of Worcester, Henwick Grove, WR2 6AJ Worcester, UK.; School of Biology and Environmental Sciences, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Godfrey P Apangu
- National Pollen and Aerobiological Research Unit, School of Science and the Environment, University of Worcester, Henwick Grove, WR2 6AJ Worcester, UK.; Department of Biointeractions & Crop Protection, Rothamsted Research, West Common, AL5 2JQ Harpenden, UK
| | - Geoffrey M Petch
- National Pollen and Aerobiological Research Unit, School of Science and the Environment, University of Worcester, Henwick Grove, WR2 6AJ Worcester, UK
| | - Beverley Adams-Groom
- National Pollen and Aerobiological Research Unit, School of Science and the Environment, University of Worcester, Henwick Grove, WR2 6AJ Worcester, UK
| | - Carsten A Skjøth
- National Pollen and Aerobiological Research Unit, School of Science and the Environment, University of Worcester, Henwick Grove, WR2 6AJ Worcester, UK
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Shokouhi Shoormasti R, Rafaiani C, Fazlollahi MR, Kazemnejad A, Mahloojirad M, Moslemi M, Abbasi JM, Moin M, Pourpak Z, Mari A. Molecular Profile of Specific IgE to Allergenic Components in Allergic Adults Using Allergen Nano-Bead Array. Clin Exp Allergy 2022; 52:942-953. [PMID: 35174570 DOI: 10.1111/cea.14113] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 01/26/2022] [Accepted: 01/29/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND An increasing interest in the field of molecular diagnosis of allergy has been developed in recent years and it goes to be as the routine in-vitro protocol in allergy diagnosis. Friendly Allergen Nano-bead Array (FABER) is a new multiplex assay for the evaluation of specific IgE against 244 allergens including whole extracts and allergenic molecules. The research intended to assess the pattern of IgE sensitization to allergenic components of allergens in allergic adults using FABER 244. METHODS Sixty patients with allergic diseases entered this cross-sectional study. Specific IgE to 122 whole allergens extracts and 122 allergenic components was assessed using an allergen nano-bead array (FABER) for all patients. This test includes inhalant and food allergens. RESULTS Thirty-seven patients were male (61.7%). The mean (SD) age of patients was 30.73(±6.87) years. As the allergen nano-bead array results showed, Lolium perenne (63.3%), Phleum pretense (60%), and Platanus acerifolia (51.7%) were considered as the most common IgE-sensitizations to the aeroallergen extracts. Moreover, Lol p 1, Phl p 1.0102, and Cup a 1 were found as the most frequent allergenic components in our allergic patients. Among protein families, CCD bearing proteins, expansin, cysteine protease, and profilin families illustrated the highest allergic sensitization. CONCLUSIONS The results of the present study demonstrated that despite the higher prevalence of sensitization to Salsola kali (47.2%) using extract-based assays in the previous phase of this research, allergenic components of grasses (Lol p 1, Phl p 1.0102), Cup a 1 as well as Sal k1 as the major components of Cupressuss arizonica and Salsola kali showed the higher sensitization, respectively in adults' allergic patients using FABER test.
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Affiliation(s)
| | - Chiara Rafaiani
- Associated Centers for Molecular Allergology, CAAM, Rome, Italy
| | - Mohammad Reza Fazlollahi
- Immunology, Asthma, and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Anoshirvan Kazemnejad
- Department of Biostatistics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Maryam Mahloojirad
- Immunology, Asthma, and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Majid Moslemi
- Blood Transfusion Organization Research Center, Tehran, Iran
| | - Javid Morad Abbasi
- Asthma and Allergy Center, Tehran Medical Sciences Branch of Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
| | - Mostafa Moin
- Immunology, Asthma, and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Pourpak
- Immunology, Asthma, and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Adriano Mari
- Associated Centers for Molecular Allergology, CAAM, Rome, Italy
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Anar M, Ahmad M, Zafar S, Elnaggar AY, Zafar M, Sultana S, Tariq A, Anjum F, Hussein EE, Kiliç Ö, Ozdemir FA. Palyno‐morphological diversity of Asteraceous and Poaceous allergenic plant using microscopic techniques in lesser
Himalaya‐Pakistan. Microsc Res Tech 2022; 85:2061-2075. [DOI: 10.1002/jemt.24063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/29/2021] [Accepted: 01/10/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Maryam Anar
- Department of Plant Sciences Quaid‐i‐Azam University Islamabad Pakistan
| | - Mushtaq Ahmad
- Department of Plant Sciences Quaid‐i‐Azam University Islamabad Pakistan
| | - Sadia Zafar
- Department of Botany, Division of Science and Technology University of Education Lhaore Punjab 54770 Pakistan
| | - Ashraf Y. Elnaggar
- Department of Food Nutrition Science (Previously Chemistry), College of Science Taif University Taif Saudi Arabia
| | - Muhammad Zafar
- Department of Plant Sciences Quaid‐i‐Azam University Islamabad Pakistan
| | - Shazia Sultana
- Department of Plant Sciences Quaid‐i‐Azam University Islamabad Pakistan
| | - Akash Tariq
- Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences Urumqi China
- Cele National Station of Observation and Research for Desert‐Grassland Ecosystems Cele China
| | - Farida Anjum
- Department of Plant Sciences Quaid‐i‐Azam University Islamabad Pakistan
| | | | - Ömer Kiliç
- Department of Basic Science of Pharmacy, Faculty of Pharmacy Adıyaman University Adıyaman Turkey
| | - Fethi Ahmet Ozdemir
- Department of Molecular Biology and Genetics, Faculty of Science and Art Bingol University Bingol Turkey
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Severova E, Kopylov-Guskov Y, Selezneva Y, Karaseva V, Yadav SR, Sokoloff D. Pollen Production of Selected Grass Species in Russia and India at the Levels of Anther, Flower and Inflorescence. PLANTS 2022; 11:plants11030285. [PMID: 35161263 PMCID: PMC8840183 DOI: 10.3390/plants11030285] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/11/2022] [Accepted: 01/18/2022] [Indexed: 11/16/2022]
Abstract
Grasses produce large amounts of pollen and are among the main causes of pollen allergy worldwide. Quantification of the roles of individual grass species in airborne pollen is an important task, because morphologically indistinguishable pollen grains of different species may differ in allergenicity. This requires knowledge of the pollen production of individual grass species; however, accumulated data are insufficient in this respect. Attempting to fill this gap, we studied pollen production per inflorescence in 29 grass species which are widespread in Middle Russia and India. Pollen production per inflorescence is determined by the number of grains per anther, the number of flowers in a spikelet and the number of spikelets per inflorescence, with the latter parameter being the most variable. We support the hypothesis that pollen production per inflorescence differs significantly between annual and perennial grasses. The greater pollen production of perennials can be interpreted as a tendency to guarantee cross-fertilization of species with self-incompatibility. The inferred pollen/ovule (P/O) ratios suggest the occurrence of facultative xenogamy in all annuals and obligate xenogamy in most perennials in the present dataset, though some self-incompatible annuals exist outside our sampling. Earlier data indicated that the P/O ratio of the annual cereal crop rye (Secale cereale) is higher than in any annual or perennial species sampled here. A ratio of pollen production to seed set (P/S ratio) is suggested to be another efficient parameter in reproductive biology of grasses. We highlight a need for detailed studies of reproductive biology in grasses that include both pollen and seed production. We found a correlation between pollen production per anther and anther length. A rough approximation of c. 1000 pollen grains per 1 mm of the length of an anther provides an instrument for estimates of pollen production in plant communities.
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Affiliation(s)
- Elena Severova
- Department of Higher Plants, Biological Faculty, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia; (Y.K.-G.); (D.S.)
- Correspondence: ; Tel.: +7-915-3884349
| | - Yury Kopylov-Guskov
- Department of Higher Plants, Biological Faculty, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia; (Y.K.-G.); (D.S.)
- Faculty of Biology, Shenzhen MSU-BIT University, Shenzhen 518172, China
| | - Yulia Selezneva
- Institute of Natural Science, S.A. Esenin Ryazan State University, 390000 Ryazan, Russia; (Y.S.); (V.K.)
| | - Vera Karaseva
- Institute of Natural Science, S.A. Esenin Ryazan State University, 390000 Ryazan, Russia; (Y.S.); (V.K.)
| | - Shrirang R. Yadav
- Angiosperm Taxonomy Laboratory, Department of Botany, Shivaji University, Kolhapur 416004, India;
| | - Dmitry Sokoloff
- Department of Higher Plants, Biological Faculty, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia; (Y.K.-G.); (D.S.)
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Allergenicity to worldwide invasive grass Cortaderia selloana as environmental risk to public health. Sci Rep 2021; 11:24426. [PMID: 34952907 PMCID: PMC8709847 DOI: 10.1038/s41598-021-03581-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 11/25/2021] [Indexed: 11/08/2022] Open
Abstract
Allergies to grass pollen affects about 20% of the population worldwide. In the last few decades, the South American grass Cortaderia selloana (CS, Pampas grass) has expanded worldwide in a variety of countries including the USA, Australia and Western Europe. In many of these locations, CS has strikingly spread and has now been classified an invasive species. Many pernicious consequences of CS have been reported for local biodiversity, landscape and structures. However, the effect on human health has not been studied. To investigate this issue, we have chosen a European region on the northern cost of Spain where CS spread is overwhelming, Cantabria. We obtained CS pollen extract and analysed the allergenic reaction of 98 patients that were allergic to pollen of local grasses. We determined the skin reaction and the presence of specific IgE antibodies (sIgE) to CS or to a typical autochthonous grass, Phleum pratense. We also compared the seasonal symptoms with reported grass pollen counts in the area. The results strongly suggest that CS can cause respiratory allergies at a similar extent to the local grasses. Given that CS pollinises later than the local grasses, this would extend the period of grass allergies in the region for about three months every year, as stated by most of the patients. This is the first study reported on the effects of the striking expansion of CS on human health. Considering the strong impact that respiratory allergies have on the population, our results suggest that CS can currently constitute a relevant environmental health issue.
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Chakraborty S, Biswas P, Dutta S, Basak M, Guha S, Chatterjee U, Das M. Studies on Reproductive Development and Breeding Habit of the Commercially Important Bamboo Bambusa tulda Roxb. PLANTS 2021; 10:plants10112375. [PMID: 34834738 PMCID: PMC8619091 DOI: 10.3390/plants10112375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/10/2021] [Accepted: 08/18/2021] [Indexed: 11/16/2022]
Abstract
Compared to other grasses, flowering in bamboo is quite divergent, yet complex with respect to time to flower, number of individual culms in a population that have been induced at a time (sporadic vs. gregarious), nature of monocarpy, morphology of inflorescences (solitary spikelet vs. pseudospikelet), biology of pollen and nature of genetic compatibility. Wide diversity exists even across species and genotypes. However, due to the rarity of flowering and inaccessibility, few studies have been done to systematically analyse diverse aspects of the reproductive behaviour of bamboo. In this study, four recurrently occurring, sporadic flowering populations of Bambusa tulda have been closely observed over the last seven years. Detailed inflorescence and floral morphology and development of reproductive organs have been studied. Pollen viability was assessed by staining and in vitro germination. Self and cross pollination experiments were performed in a plantation site to assess the genetic nature of pollen-pistil interaction. The study identifies interesting reproductive features, that are not common in other grasses. A few important observations include the early appearance of a solitary spikelet vs. late appearance of a pseudospikelet in the flowering cycle, low rate of pollen germination, protandry, self-incompatibility and higher rate of seed setting by the pseudospikelet as compared to the solitary spikelet. The findings will not only be useful to understand the reproductive behaviour of this non-woody timber plant, but will also be useful for forest management and sustainable use of bamboo bioresources.
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Affiliation(s)
- Sukanya Chakraborty
- Department of Life Sciences, Presidency University, Kolkata 700073, India; (S.C.); (P.B.); (S.D.); (M.B.)
| | - Prasun Biswas
- Department of Life Sciences, Presidency University, Kolkata 700073, India; (S.C.); (P.B.); (S.D.); (M.B.)
- Department of Botany, Kalna College, Kalna 713409, India
| | - Smritikana Dutta
- Department of Life Sciences, Presidency University, Kolkata 700073, India; (S.C.); (P.B.); (S.D.); (M.B.)
| | - Mridushree Basak
- Department of Life Sciences, Presidency University, Kolkata 700073, India; (S.C.); (P.B.); (S.D.); (M.B.)
| | - Suman Guha
- Department of Statistics, Presidency University, Kolkata 700073, India;
| | - Uday Chatterjee
- Department of Geography, Bhatter College, Kharagpur 721426, India;
| | - Malay Das
- Department of Life Sciences, Presidency University, Kolkata 700073, India; (S.C.); (P.B.); (S.D.); (M.B.)
- Correspondence:
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Xu X, Qin L, Ren L, Wang C, Zhang Y, Zhang L. Comparative analysis of chronic rhinitis patient profiles during autumn pollen season between grassland and non-grassland cities in North China. Allergy Asthma Clin Immunol 2021; 17:106. [PMID: 34635159 PMCID: PMC8503993 DOI: 10.1186/s13223-021-00591-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/24/2021] [Indexed: 11/11/2022] Open
Abstract
Background The symptoms of patients with respiratory disease are influenced by local environmental factors. The incidence of allergic rhinitis in grassland areas was significantly higher than that in non-grassland areas. We aimed to compare the profiles of chronic rhinitis patients obtained during the autumn pollen season in Baotou (grassland city) and Beijing (non-grassland city), China. Methods Questionnaire surveys and allergen testing were conducted on 1170 and 1232 patients with chronic rhinitis visiting the Second Affiliated Hospital of Baotou Medical College and Beijing Tongren Hospital, respectively, during the autumn pollen period. Information regarding medical history, severity of symptoms, and diagnosis and treatment was collected. Results More patients with moderate to severe chronic rhinitis and asthma (both, P < 0.001) were present in Baotou than in Beijing. Mugwort was the most abundant allergen in both regions, but the number of patients sensitized to outdoor allergens in Baotou was higher than that in Beijing (P < 0.001). Indoor allergens in Beijing represented a considerable proportion of allergens, especially dust mites (33.4%). For patients with allergic rhinitis, nasal congestion, nasal itching, and runny nose were more severe in Baotou than in Beijing (P < 0.001). In both Baotou and Beijing, allergy (P < 0.001 vs. P = 0.004) and combined asthma (P = 0.049 vs. P = 0.005) were common factors affecting the severity of the clinical symptoms chronic rhinitis. In Baotou, age (rs = 0.195, P < 0.001) and family allergy history (P = 0.010) were also associated with symptom severity. Although significantly more patients in Baotou received oral antihistamines, nasal corticosteroids, and surgical treatment than in Beijing (P < 0.001), the number of people receiving allergy immunotherapy in Baotou was lower (P = 0.004) and post-treatment symptom control was worse (P < 0.001) that that in Beijing. Conclusions During the pollen period, there were significant differences in the allergen spectrum between Baotou and Beijing. Allergy and combined asthma were common factors affecting the severity of clinical symptoms. Patients in Baotou presented with more severe clinical symptoms that were not satisfactorily managed due to the impact of pollen exposure, inconsistent access to care, and differing treatment modalities. Supplementary Information The online version contains supplementary material available at 10.1186/s13223-021-00591-w.
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Affiliation(s)
- Xu Xu
- Department of Otolaryngology Head and Neck Surgery, Beijing Tong Ren Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otolaryngology, No. 17, Hou Gou Hu Tong, Dong Cheng District, 100005, Beijing, People's Republic of China.,Department of Allergy, Beijing Tong Ren Hospital, Capital Medical University, Beijing, China
| | - Long Qin
- The Second Affiliated Hospital of Baotou Medical College, Baotou Medical College, Baotou, China
| | - Lei Ren
- Department of Allergy, Beijing Tong Ren Hospital, Capital Medical University, Beijing, China
| | - Chengshuo Wang
- Department of Otolaryngology Head and Neck Surgery, Beijing Tong Ren Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otolaryngology, No. 17, Hou Gou Hu Tong, Dong Cheng District, 100005, Beijing, People's Republic of China
| | - Yuan Zhang
- Department of Otolaryngology Head and Neck Surgery, Beijing Tong Ren Hospital, Capital Medical University, Beijing, China. .,Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otolaryngology, No. 17, Hou Gou Hu Tong, Dong Cheng District, 100005, Beijing, People's Republic of China. .,Department of Allergy, Beijing Tong Ren Hospital, Capital Medical University, Beijing, China.
| | - Luo Zhang
- Department of Otolaryngology Head and Neck Surgery, Beijing Tong Ren Hospital, Capital Medical University, Beijing, China. .,Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otolaryngology, No. 17, Hou Gou Hu Tong, Dong Cheng District, 100005, Beijing, People's Republic of China. .,Department of Allergy, Beijing Tong Ren Hospital, Capital Medical University, Beijing, China.
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Picornell A, Oteros J, Ruiz-Mata R, Recio M, Trigo MM, Martínez-Bracero M, Lara B, Serrano-García A, Galán C, García-Mozo H, Alcázar P, Pérez-Badia R, Cabezudo B, Romero-Morte J, Rojo J. Methods for interpolating missing data in aerobiological databases. ENVIRONMENTAL RESEARCH 2021; 200:111391. [PMID: 34058184 DOI: 10.1016/j.envres.2021.111391] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/15/2021] [Accepted: 05/21/2021] [Indexed: 06/12/2023]
Abstract
Missing data is a common problem in scientific research. The availability of extensive environmental time series is usually laborious and difficult, and sometimes unexpected failures are not detected until samples are processed. Consequently, environmental databases frequently have some gaps with missing data in it. Applying an interpolation method before starting the data analysis can be a good solution in order to complete this missing information. Nevertheless, there are several different approaches whose accuracy should be considered and compared. In this study, data from 6 aerobiological sampling stations were used as an example of environmental data series to assess the accuracy of different interpolation methods. For that, observed daily pollen/spore concentration data series were randomly removed, interpolated by using different methods and then, compared with the observed data to measure the errors produced. Different periods, gap sizes, interpolation methods and bioaerosols were considered in order to check their influence in the interpolation accuracy. The moving mean interpolation method obtained the highest success rate as average. By using this method, a success rate of the 70% was obtained when the risk classes used in the alert systems of the pollen information platforms were taken into account. In general, errors were mostly greater when there were high oscillations in the concentrations of biotic particles during consecutive days. That is the reason why the pre-peak and peak periods showed the highest interpolation errors. The errors were also higher when gaps longer than 5 days were considered. So, for completing long periods of missing data, it would be advisable to test other methodological approaches. A new Variation Index based on the behaviour of the pollen/spore season (measurement of the variability of the concentrations every 2 consecutive days) was elaborated, which allows to estimate the potential error before the interpolation is applied.
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Affiliation(s)
- A Picornell
- Department of Botany and Plant Physiology, University of Malaga, Campus de Teatinos s/n, E-29071, Malaga, Spain.
| | - J Oteros
- Department of Botany, Ecology and Plant Physiology, Agrifood Campus of International Excellence CeiA3, University of Cordoba, Cordoba, Spain; Andalusian Inter-University Institute for Earth System IISTA, University of Cordoba, Spain
| | - R Ruiz-Mata
- Department of Botany and Plant Physiology, University of Malaga, Campus de Teatinos s/n, E-29071, Malaga, Spain
| | - M Recio
- Department of Botany and Plant Physiology, University of Malaga, Campus de Teatinos s/n, E-29071, Malaga, Spain
| | - M M Trigo
- Department of Botany and Plant Physiology, University of Malaga, Campus de Teatinos s/n, E-29071, Malaga, Spain
| | - M Martínez-Bracero
- Department of Botany, Ecology and Plant Physiology, Agrifood Campus of International Excellence CeiA3, University of Cordoba, Cordoba, Spain; Andalusian Inter-University Institute for Earth System IISTA, University of Cordoba, Spain; School of Chemical and Pharmaceutical Sciences, Technological University Dublin, Dublin, Ireland
| | - B Lara
- University of Castilla-La Mancha, Institute of Environmental Sciences (Botany), Toledo, Spain
| | - A Serrano-García
- University of Castilla-La Mancha, Institute of Environmental Sciences (Botany), Toledo, Spain
| | - C Galán
- Department of Botany, Ecology and Plant Physiology, Agrifood Campus of International Excellence CeiA3, University of Cordoba, Cordoba, Spain; Andalusian Inter-University Institute for Earth System IISTA, University of Cordoba, Spain
| | - H García-Mozo
- Department of Botany, Ecology and Plant Physiology, Agrifood Campus of International Excellence CeiA3, University of Cordoba, Cordoba, Spain; Andalusian Inter-University Institute for Earth System IISTA, University of Cordoba, Spain
| | - P Alcázar
- Department of Botany, Ecology and Plant Physiology, Agrifood Campus of International Excellence CeiA3, University of Cordoba, Cordoba, Spain; Andalusian Inter-University Institute for Earth System IISTA, University of Cordoba, Spain
| | - R Pérez-Badia
- University of Castilla-La Mancha, Institute of Environmental Sciences (Botany), Toledo, Spain
| | - B Cabezudo
- Department of Botany and Plant Physiology, University of Malaga, Campus de Teatinos s/n, E-29071, Malaga, Spain
| | - J Romero-Morte
- University of Castilla-La Mancha, Institute of Environmental Sciences (Botany), Toledo, Spain
| | - J Rojo
- University of Castilla-La Mancha, Institute of Environmental Sciences (Botany), Toledo, Spain; Department of Pharmacology, Pharmacognosy and Botany, Complutense University, Madrid, Spain
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Ma T, Chen Y, Pang Y, Wang X, Dai D, Zhuang Y, Shi H, Zheng M, Zhang R, Jin W, Yang X, Wang Y, Shan G, Yan Y, Wang D, Wang X, Wei Q, Yin J, Wang X, Zhang L. Prevalence and risk factors of allergic rhinitis and asthma in the southern edge of the plateau grassland region of northern China: A cross-sectional study. World Allergy Organ J 2021; 14:100537. [PMID: 34429814 PMCID: PMC8356121 DOI: 10.1016/j.waojou.2021.100537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 03/24/2021] [Accepted: 03/30/2021] [Indexed: 12/12/2022] Open
Abstract
Background The prevalence rates of allergic rhinitis (AR) and asthma in the border region of China may be different from those in the central region of plateau grasslands. A survey was performed to investigate the prevalence and risk factors for AR, asthma, and AR combined with asthma among adults (age ≥ 20 years) residing in the southern border of plateau grasslands in northern China. Methods From May to August 2018, a cross-sectional survey was completed by subjects that were selected using a cluster random sampling method. The subjects completed a questionnaire and were administered skin prick tests (SPTs). Risk factors for AR, asthma, and AR combined with asthma were examined by multivariate logistic regression analyses. Results A total of 1815 adult subjects in the selected region completed study. The prevalence rates of physician-diagnosed AR, asthma, and AR combined with asthma were 13.9% (253), 9.8% (177), and 2.9% (52), respectively. Among the patients with AR, 20.6% were found to have concurrent asthma; among the patients with asthma, 29.4% were found to have concurrent AR. Artemisia and Humulus pollen were the most common sensitizing pollen types. Approximately 70% of subjects with AR and <30% of asthma patients were sensitized to Artemisia and Humulus pollen. Symptoms of AR and asthma mainly appeared during August. A multivariable logistic regression analysis identified sensitization pollen as an independent risk factor for both AR and AR combined with asthma (AR: OR = 16.23, 95% CI: 10.15–25.96; AR combined with asthma: OR = 6.16, 95% CI: 1.28–29.66). An age >40 years old, family history of asthma, moderate-to-severe AR, adverse food reactions, and mold allergies were independent risk factors for AR combined with asthma. Conclusions This study identified the prevalence rates of AR and asthma in the southern borders of the plateau grassland in northern China (>1500 m above sea level). Sensitization pollen is an independent risk factor for AR and AR combined with asthma.
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Key Words
- AI, Alternaria
- AR, allergic rhinitis
- ARIA, Allergic Rhinitis and its Impact on Asthma
- Allergic rhinitis
- Ar, Artemisia
- Asthma
- BHR, Bronchial hyper-responsiveness
- Df, Dermatophagoides farinae
- Dp, Dermatophagoides pteronyssinus
- Hu, Humulus scandens
- IQR, Interquartile range
- Pollen
- Prevalence
- Risk factors
- SPTs, Skin prick tests
- Sa, Salix
- UI, Ulmus pumila
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Affiliation(s)
- Tingting Ma
- Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Yanlei Chen
- Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Yaojun Pang
- Department of Allergy, Zhangbei Hospital, Hebei Province, China
| | - Xiangdong Wang
- Department of Otolaryngology Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otolaryngology, Beijing, China
| | - Deqing Dai
- Department of Allergy, Zhangbei Hospital, Hebei Province, China
| | - Yan Zhuang
- Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Haiyun Shi
- Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Ming Zheng
- Department of Otolaryngology Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otolaryngology, Beijing, China
| | - Ruijuan Zhang
- Department of Allergy, Zhangbei Hospital, Hebei Province, China
| | - Weiting Jin
- Department of Allergy, Zhangbei Hospital, Hebei Province, China
| | - Xiaomei Yang
- Department of Allergy, Zhangbei Hospital, Hebei Province, China
| | - Ye Wang
- Department of Epidemiology and Statistics, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Guangliang Shan
- Department of Epidemiology and Statistics, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Yong Yan
- Department of Urology, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Deyun Wang
- Department of Otolaryngology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Xiaoyan Wang
- Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Qingyu Wei
- Department of Allergy, General Hospital of Northern Theater Command, Shenyang, Liao Ning Province, China
| | - Jinshu Yin
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Xueyan Wang
- Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Luo Zhang
- Department of Otolaryngology Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing Key Laboratory of Nasal Diseases, Beijing Institute of Otolaryngology, Beijing, China
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Wu AC, Dahlin A, Wang AL. The Role of Environmental Risk Factors on the Development of Childhood Allergic Rhinitis. CHILDREN 2021; 8:children8080708. [PMID: 34438599 PMCID: PMC8391414 DOI: 10.3390/children8080708] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 08/15/2021] [Accepted: 08/16/2021] [Indexed: 01/20/2023]
Abstract
Environmental factors play an important role in the development and exacerbation of allergic rhinitis (AR) in childhood. Indoor air pollution, such as house dust mites and secondhand smoke, can significantly increase the onset of AR, while pet dander may affect the exacerbation of AR symptoms in children. Furthermore, traffic related air pollution and pollen are outdoor air pollutants that can affect immune competency and airway responsiveness, increasing the risk of AR in children. Climate change has increased AR in children, as growth patterns of allergenic species have changed, resulting in longer pollen seasons. More extreme and frequent weather events also contribute to the deterioration of indoor air quality due to climate change. Additionally, viruses provoke respiratory tract infections, worsening the symptoms of AR, while viral infections alter the immune system. Although viruses and pollution influence development and exacerbation of AR, a variety of treatment and prevention options are available for AR patients. The protective influence of vegetation (greenness) is heavily associated with air pollution mitigation, relieving AR exacerbations, while the use of air filters can reduce allergic triggers. Oral antihistamines and intranasal corticosteroids are common pharmacotherapy for AR symptoms. In this review, we discuss the environmental risk factors for AR and summarize treatment strategies for preventing and managing AR in children.
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40
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de Weger LA, Bruffaerts N, Koenders MMJF, Verstraeten WW, Delcloo AW, Hentges P, Hentges F. Long-Term Pollen Monitoring in the Benelux: Evaluation of Allergenic Pollen Levels and Temporal Variations of Pollen Seasons. FRONTIERS IN ALLERGY 2021; 2:676176. [PMID: 35387026 PMCID: PMC8974733 DOI: 10.3389/falgy.2021.676176] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 06/03/2021] [Indexed: 12/03/2022] Open
Abstract
Airborne pollen is a major cause of allergic rhinitis, affecting between 10 and 30% of the population in Belgium, the Netherlands, and Luxembourg (Benelux). Allergenic pollen is produced by wind pollinating plants and released in relatively low to massive amounts. Current climate changes, in combination with increasing urbanization, are likely to affect the presence of airborne allergenic pollen with respect to exposure intensity, timing as well as duration. Detailed analysis of long-term temporal trends at supranational scale may provide more comprehensive insight into these phenomena. To this end, the Spearman correlation was used to statistically compare the temporal trends in airborne pollen concentration monitored at the aerobiological stations which gathered the longest time-series (30–44 years) in the Benelux with a focus on the allergenic pollen taxa: Alnus, Corylus, Betula, Fraxinus, Quercus, Platanus, Poaceae, and Artemisia. Most arboreal species showed an overall trend toward an increase in the annual pollen integral and peak values and an overall trend toward an earlier start and end of the pollen season, which for Betula resulted in a significant decrease in season length. For the herbaceous species (Poaceae and Artemisia), the annual pollen integral and peak values showed a decreasing trend. The season timing of Poaceae showed a trend toward earlier starts and longer seasons in all locations. In all, these results show that temporal variations in pollen levels almost always follow a common trend in the Benelux, suggesting a similar force of climate change-driven factors, especially for Betula where a clear positive correlation was found between changes in temperature and pollen release over time. However, some trends were more local-specific indicating the influence of other environmental factors, e.g., the increasing urbanization in the surroundings of these monitoring locations. The dynamics in the observed trends can impact allergic patients by increasing the severity of symptoms, upsetting the habit of timing of the season, complicating diagnosis due to overlapping pollen seasons and the emergence of new symptoms due allergens that were weak at first.
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Affiliation(s)
- Letty A. de Weger
- Department of Pulmonology, Leiden University Medical Center, Leiden, Netherlands
- Department of Public Health and Primary Care, National eHealth Living Lab, Leiden University Medical Center, Leiden, Netherlands
- *Correspondence: Letty A. de Weger
| | | | | | - Willem W. Verstraeten
- Dispersion and Atmospheric Composition, Royal Meteorological Institute of Belgium, Brussels, Belgium
| | - Andy W. Delcloo
- Dispersion and Atmospheric Composition, Royal Meteorological Institute of Belgium, Brussels, Belgium
| | - Pierre Hentges
- Aerobiology Data Analysis Consulting, Centre Hospitalier de Luxembourg, Luxembourg, Luxembourg
| | - François Hentges
- Unit of Immunology-Allergology, Centre Hospitalier de Luxembourg, Luxembourg, Luxembourg
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Visez N, de Nadaï P, Choël M, Farah J, Hamzé M, Sénéchal H, Pauwels M, Frérot H, Thibaudon M, Poncet P. Biochemical composition of Phleum pratense pollen grains: A review. Mol Immunol 2021; 136:98-109. [PMID: 34098345 DOI: 10.1016/j.molimm.2021.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 05/28/2021] [Indexed: 01/02/2023]
Abstract
The Poaceae family is composed of 12,000 plant species. Some of these species produce highly allergenic anemophilous pollen grains (PGs). Phleum pratense pollen grains (PPPGs) emerged as a model for studies related to grass allergy. The biochemical composition of allergenic PGs has not yet been fully described despite potential health effects of PG constituents other than allergenic proteins. This review brings together the information available in literature aiming at creating a comprehensive picture of the current knowledge about the chemical composition of allergenic PGs from timothy grass. PPPGs have an average diameter between 30-35 μm and the mass of a single PG was reported between 11 and 26 ng. The pollen cytoplasm is filled with two types of pollen cytoplasmic granules (PCGs): the starch granules and the polysaccharide particles (p-particles). Starch granules have a size between 0.6-2.5 μm with an average diameter of 1.1 μm (estimated number of 1000 granules per PG) while p-particles have a size ranging around 0.3 to 0.4 μm (estimated number between 61,000-230,000 p-particles per PG). The rupture of PG induces the release of PCGs and the dispersion of allergens in the inhalable fraction of atmospheric aerosol. PPPGs are composed of sporopollenin, sugars, polysaccharides, starch, glycoproteins (including allergens), amino-acids, lipids, flavonoids (including isorhamnetin), various elements (the more abundant being Si, Mg and Ca), phenolic compounds, phytoprostanoids, carotenoids (pigments) metals and adsorbed pollutants. PPPG contains about a hundred different proteins with molecular masses ranging from 10 to 94 kDa, with isoelectric points from 3.5-10.6. Among these proteins, allergens are classified in eleven groups from 1 to 13 with allergens from groups 1 and 5 being the major contributors to Phl p pollen allergy. Major allergen Phl p 5 was quantified in PPPGs by several studies with concentration ranging from 2.7 and 3.5 μg.mg-1 in unpolluted environment. Values for other allergens are scarce in literature; only one quantitative assessment exists for allergen groups Phl p 1, 2 and 4. The extractible lipid fraction of PPPGs is estimated between 1.7-2.2% of the total PG mass. The main chemical families of lipids reported in PPPGs are: alkanes, alkenes, alcohols, saturated and unsaturated fatty acids, di- and tri-hydroxylated fatty acids, aldehydes and sterols. Several lipid compounds with potential adjuvant effects on allergy have been specifically quantified in PPPGs: E2-like prostaglandin (PGE2), B4-like leukotriene (LTB4), unsaturated fatty acids (linoleic and linolenic acids and their hydroxylated derivatives), adenosine, vitamins and phenolic compounds. Some other biochemical characteristics such as NAD(P)H oxidase, protease activity and pollen microbiome were described in the literature. The bioaccessibility in physiological conditions has not been described for most biochemicals transported by allergenic PPPGs. There is also a considerable lack of knowledge about the potential health effects of pollen constituents other than allergens. The variability of pollen composition remains also largely unknown despite its importance for plant reproduction and allergy in an environment characterized by chemical pollution, climate change and loss of biodiversity.
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Affiliation(s)
- Nicolas Visez
- Univ. Lille, CNRS, UMR 8522 - PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère, F-59000, Lille, France
| | - Patricia de Nadaï
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, F-59000, Lille, France
| | - Marie Choël
- Univ. Lille, CNRS, UMR 8516 - LASIRE - Laboratoire Avancé de Spectroscopie pour les Interactions, la Réactivité et l'Environnement, F-59000, Lille, France.
| | - Jinane Farah
- Univ. Lille, CNRS, UMR 8522 - PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère, F-59000, Lille, France
| | - Mona Hamzé
- Univ. Lille, CNRS, UMR 8522 - PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère, F-59000, Lille, France; Univ. Lille, CNRS, UMR 8516 - LASIRE - Laboratoire Avancé de Spectroscopie pour les Interactions, la Réactivité et l'Environnement, F-59000, Lille, France
| | - Hélène Sénéchal
- Immunology Department, Allergy & Environment Team, Children Armand Trousseau Hospital APHP, 75012, Paris, France
| | - Maxime Pauwels
- Univ. Lille, CNRS, UMR 8516 - LASIRE - Laboratoire Avancé de Spectroscopie pour les Interactions, la Réactivité et l'Environnement, F-59000, Lille, France
| | - Hélène Frérot
- Univ. Lille, CNRS, UMR 8516 - LASIRE - Laboratoire Avancé de Spectroscopie pour les Interactions, la Réactivité et l'Environnement, F-59000, Lille, France
| | - Michel Thibaudon
- Réseau National de Surveillance Aérobiologique, Le Plat du Pin, 69690, Brussieu, France
| | - Pascal Poncet
- Immunology Department, Allergy & Environment Team, Children Armand Trousseau Hospital APHP, 75012, Paris, France; Immunology Department, Institut Pasteur, Paris, France
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42
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Ortega-Rosas CI, Meza-Figueroa D, Vidal-Solano JR, González-Grijalva B, Schiavo B. Association of airborne particulate matter with pollen, fungal spores, and allergic symptoms in an arid urbanized area. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:1761-1782. [PMID: 33090369 DOI: 10.1007/s10653-020-00752-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
Studies focused on the seasonal distribution of pollen and spores in semiarid cities are scarce. At these sites, climate change potentiates the emission and transport of fine (PM10) to ultrafine particles (PM2.5), easily attached to pollen surfaces, causing allergen's release. This study examines the potential correlation of seasonal variations of pollen, fungal spores, PM10, and meteorological parameters with allergic reactions of 150 people living in a Sonoran desert city. We collected PM10, airborne pollen, and spores during a year. We also studied topsoil and road dust samples as potential PM-emission sources. We obtained dust-mineralogy, chemistry, and particle size attached to pollen by X-ray diffraction and scanning electron microscope. Results show that seasonal high PM-loading in the urban atmosphere coincides with aeroallergens promoting micro- to nanoparticles' attachment to pollen's surface. A collapsed membrane was observed in several samples after individual grains show the following maximum wall coverage: Poaceae 28%, Asteraceae 40%, Chenopodiaceae-Amaranthacea 29%, Fabaceae 18%. Most of the particles covering pollen's surface have a geogenic origin mixed with metals linked to traffic (bromide, chlorine, and antimony). Mineralogical, granulometric analysis, and main wind-direction show that two local soil-types are the main contributors to PM. A high frequency of positive sensitization to pollen with high particle loading was detected. These results suggest that climate-driven dust emissions may alter pollen and spore surfaces' physicochemical characteristics with the further consequences in their allergenic potential.
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Affiliation(s)
- C I Ortega-Rosas
- Licenciatura en Ecología, Universidad Estatal de Sonora, Unidad Académica Hermosillo, Ley Federal del Trabajo SN, Col. Apolo, C.P.83100, Hermosillo, Sonora, Mexico.
| | - D Meza-Figueroa
- Departamento de Geología, Universidad de Sonora, Blvd. Luis Encinas Y Rosales, Col. Centro, C.P.83000, Hermosillo, Sonora, Mexico
| | - J R Vidal-Solano
- Departamento de Geología, Universidad de Sonora, Blvd. Luis Encinas Y Rosales, Col. Centro, C.P.83000, Hermosillo, Sonora, Mexico
| | - B González-Grijalva
- Licenciatura en Ecología, Universidad Estatal de Sonora, Unidad Académica Hermosillo, Ley Federal del Trabajo SN, Col. Apolo, C.P.83100, Hermosillo, Sonora, Mexico
- Departamento de Geología, Universidad de Sonora, Blvd. Luis Encinas Y Rosales, Col. Centro, C.P.83000, Hermosillo, Sonora, Mexico
| | - B Schiavo
- Departamento de Geología, Universidad de Sonora, Blvd. Luis Encinas Y Rosales, Col. Centro, C.P.83000, Hermosillo, Sonora, Mexico
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Van Haeften S, Milic A, Addison‐Smith B, Butcher C, Davies JM. Grass Gazers: Using citizen science as a tool to facilitate practical and online science learning for secondary school students during the COVID-19 lockdown. Ecol Evol 2021; 11:3488-3500. [PMID: 33362921 PMCID: PMC7753511 DOI: 10.1002/ece3.6948] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/27/2020] [Accepted: 09/30/2020] [Indexed: 12/11/2022] Open
Abstract
The coronavirus disease of 2019 (COVID-19) pandemic has impacted educational systems worldwide during 2020, including primary and secondary schooling. To enable students of a local secondary school in Brisbane, Queensland, to continue with their practical agricultural science learning and facilitate online learning, a "Grass Gazers" citizen science scoping project was designed and rapidly implemented as a collaboration between the school and a multidisciplinary university research group focused on pollen allergy. Here, we reflect on the process of developing and implementing this project from the perspective of the school and the university. A learning package including modules on pollen identification, tracking grass species, measuring field greenness, using a citizen science data entry platform, forensic palynology, as well as video guides, risk assessment and feedback forms were generated. Junior agriculture science students participated in the learning via online lessons and independent data collection in their own local neighborhood and/or school grounds situated within urban environments. The university research group and school coordinator, operating in their own distributed work environments, had to develop, source, adopt, and/or adapt material rapidly to meet the unique requirements of the project. The experience allowed two-way knowledge exchange between the secondary and tertiary education sectors. Participating students were introduced to real-world research and were able to engage in outdoor learning during a time when online, indoor, desk-based learning dominated their studies. The unique context of restrictions imposed by the social isolation policies, as well as government Public Health and Department of Education directives, allowed the team to respond by adapting teaching and research activity to develop and trial learning modules and citizen science tools. The project provided a focus to motivate and connect teachers, academic staff, and school students during a difficult circumstance. Extension of this citizen project for the purposes of research and secondary school learning has the potential to offer ongoing benefits for grassland ecology data acquisition and student exposure to real-world science.
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Affiliation(s)
- Shanice Van Haeften
- School of Biomedical ScienceCentre Immunity and Infection Control and Centre for the EnvironmentSchool of Biomedical ScienceQueensland University of TechnologyBrisbaneQldAustralia
| | - Andelija Milic
- School of Biomedical ScienceCentre Immunity and Infection Control and Centre for the EnvironmentSchool of Biomedical ScienceQueensland University of TechnologyBrisbaneQldAustralia
| | - Beth Addison‐Smith
- School of Biomedical ScienceCentre Immunity and Infection Control and Centre for the EnvironmentSchool of Biomedical ScienceQueensland University of TechnologyBrisbaneQldAustralia
| | - Christopher Butcher
- Agricultural Farm and Science Innovation CentreCorinda State High SchoolBrisbaneQldAustralia
| | - Janet Mary Davies
- School of Biomedical ScienceCentre Immunity and Infection Control and Centre for the EnvironmentSchool of Biomedical ScienceQueensland University of TechnologyBrisbaneQldAustralia
- Office of ResearchMetro North Hospital and Health ServiceBrisbaneQldAustralia
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Clustering approach for the analysis of the fluorescent bioaerosol collected by an automatic detector. PLoS One 2021; 16:e0247284. [PMID: 33705418 PMCID: PMC7951810 DOI: 10.1371/journal.pone.0247284] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 02/03/2021] [Indexed: 11/19/2022] Open
Abstract
Automatically operating particle detection devices generate valuable data, but their use in routine aerobiology needs to be harmonized. The growing network of researchers using automatic pollen detectors has the challenge to develop new data processing systems, best suited for identification of pollen or spore from bioaerosol data obtained near-real-time. It is challenging to recognise all the particles in the atmospheric bioaerosol due to their diversity. In this study, we aimed to find the natural groupings of pollen data by using cluster analysis, with the intent to use these groupings for further interpretation of real-time bioaerosol measurements. The scattering and fluorescence data belonging to 29 types of pollen and spores were first acquired in the laboratory using Rapid-E automatic particle detector. Neural networks were used for primary data processing, and the resulting feature vectors were clustered for scattering and fluorescence modality. Scattering clusters results showed that pollen of the same plant taxa associates with the different clusters corresponding to particle shape and size properties. According to fluorescence clusters, pollen grouping highlighted the possibility to differentiate Dactylis and Secale genera in the Poaceae family. Fluorescent clusters played a more important role than scattering for separating unidentified fluorescent particles from tested pollen. The proposed clustering method aids in reducing the number of false-positive errors.
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45
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Abstract
Increased levels of CO2 and various greenhouse gases cause global warming and, in combination with pollutants from fossil fuel combustion and vehicular and industrial emissions, have been driving increases in noncommunicable diseases across the globe, resulting a higher mortality and morbidity. Respiratory diseases and associated allergenic manifestations have increased worldwide, with rates higher in developing countries. Pollen allergy serves as a model for studying the relationship between air pollution and respiratory disorders. Climate changes affect the quality and amount of airborne allergenic pollens, and pollutants alter their allergenicity, resulting in greater health impacts, especially in sensitized individuals.
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46
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Verstraeten WW, Kouznetsov R, Hoebeke L, Bruffaerts N, Sofiev M, Delcloo AW. Modelling grass pollen levels in Belgium. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 753:141903. [PMID: 32896736 DOI: 10.1016/j.scitotenv.2020.141903] [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: 05/12/2020] [Revised: 08/21/2020] [Accepted: 08/21/2020] [Indexed: 06/11/2023]
Abstract
Biogenic aerosols such as airborne grass pollen affect the public health badly by putting additional distress on people already suffering from cardiovascular and respiratory diseases. In Belgium, daily airborne pollen concentrations are monitored offline at a few sites only, hampering the timely coverage of the country and short-term forecasts. Here we apply the Chemistry Transport Model SILAM to the Belgian territory to model the spatio-temporal airborne grass pollen levels near the surface based on bottom-up inventories of grass pollen emissions updated with the Copernicus land monitoring Service grassland map of 2015. Transport of aerosols in SILAM is driven by ECMWF ERA5 meteorological data. The emitted grass pollen amounts in SILAM are computed by the multiplication of the grass pollen source map with the release rate determined by the seasonal shape production curve during the grass flowering period. The onset and offset of this period follow a location-dependent prescribed calendar days. Here we optimize the grass pollen seasonal start and end in SILAM by comparing a 2008-2018 time series of daily airborne grass pollen concentrations from the Belgian aerobiological surveillance network with the simulations. The effect of the spatial distribution of grass pollen sources is quantified by constructing pollen source-receptor relations using model simulations with varying grass pollen emissions in five areas of the model domain as input. Up to 33% of the airborne grass pollen in one area was transport from others areas inside Belgium. Adjusting the start and end of the grass pollen season improved the model performance substantially by almost doubling the correlation with local observations. By introducing the temporal scaling of the inter-seasonal pollen amounts in the model, an additional R2 increase up to 22% was obtained. Further improvements can be made by including more detailed grass pollen sources and more dynamic start and end dates of the pollen season.
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Affiliation(s)
| | | | - Lucie Hoebeke
- Sciensano, Mycology and Aerobiology Unit, Brussels, Belgium.
| | | | | | - Andy W Delcloo
- Royal Meteorological Institute of Belgium, Ukkel, Brussels, Belgium.
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47
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Morillo-Argudo DA, Andrade Tenesaca DS, Rodas-Espinoza CR, Perkin MR, Gebreegziabher TL, Zuñiga GA, Andrade Muñoz DD, Ramírez PL, García García AA, Ochoa-Avilés AM. Food allergy, airborne allergies, and allergic sensitisation among adolescents living in two disparate socioeconomic regions in Ecuador: A cross-sectional study. World Allergy Organ J 2020; 13:100478. [PMID: 33294112 PMCID: PMC7677699 DOI: 10.1016/j.waojou.2020.100478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/28/2020] [Accepted: 10/13/2020] [Indexed: 11/13/2022] Open
Abstract
Background Allergic diseases are under-investigated and overlooked health conditions in developing countries. We measured the prevalence of food allergy (FA), airborne allergic disease, and allergic sensitisation among adolescents living in 2 socio-demographically disparate regions in Ecuador. We investigated which risk factors are associated with these conditions. Methods A cross-sectional study involved 1338 students (mean age: 13 ± 0.9 years old) living in Cuenca (n = 876) and Santa Isabel (n = 462). History of allergic symptoms (noted by parents or doctor) to food, house dust mites (HDM), pollen, and pets were recorded. Sociodemographic characteristics, environmental exposures, and parental history of allergic disorders data were collected. Sensitisation to 19 food and 20 aeroallergens was measured by skin-prick testing (SPT). FA and airborne allergic diseases (to HDM, pollen, cat, or dog) were defined as a report of allergic symptoms noted by doctor, together with a positive SPT (wheal size ≥3 mm). Logistic regression models were used to identify environmental and parental factors associated with allergic conditions. Results FA was prevalent among 0.4% (95% CI 0.2%–0.9%), and food sensitisation among 19.1% of the adolescents. Shrimp was the most frequent food linked with FA and food sensitisation. Risk factors associated with FA could not be evaluated due to the low prevalence. Food sensitisation was higher among adolescents exposed to family smoking (OR 1.63, 95% CI 1.14–2.34, p = 0.008) and those with parental history of allergic disorders (OR 1.68, 95% CI 1.13–2.49, p = 0.01), but less common among adolescents owning dogs (OR 0.59, 95% CI 0.41–0.84, p = 0.003). Airborne allergic diseases were prevalent amongst 12.0% of the adolescents (95% CI: 10.4–13.9, n = 1321), with HDM as the primary allergen (11.2%). Airborne allergic diseases were less common among adolescents with more siblings (OR 0.79, 95% CI 0.65–0.96, p = 0.02) and those who lived with farm animals in the first year of life (OR 0.47, 95% CI 0.23–0.95, p = 0.04), but, most common among adolescents with a smoking family (OR 1.67, 95% CI 1.04–2.70, p = 0.03) and with a parental history of allergic disorders (OR self-perceived: 2.62, 95% CI 1.46–4.71, p = 0.001; OR diagnosed by a doctor: 4.07, 95% CI 2.44–6.80, p < 0.001). Conclusions FA and airborne allergies are less prevalent in Ecuador than in developed regions; there is a great dissociation between the prevalence of allergic disease and allergic sensitisation. Shrimp and HDM were the most prevalent allergens. Risk factors identified in this study to be related to allergic diseases should be considered by physicians, health practitioners, and epidemiologists in Ecuador.
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Affiliation(s)
- Diana A Morillo-Argudo
- Department of Biosciences, Faculty of Chemistry, University of Cuenca, Cuenca, Azuay, Ecuador
| | | | | | - Michael R Perkin
- Population Health Research Institute, St George's, University of London, Cranmer Terrace, London, SW17 0RE, England, United Kingdom
| | | | | | - Diana D Andrade Muñoz
- Department of Biosciences, Faculty of Chemistry, University of Cuenca, Cuenca, Azuay, Ecuador
| | - Patricia L Ramírez
- Department of Biosciences, Faculty of Chemistry, University of Cuenca, Cuenca, Azuay, Ecuador
| | - Ana A García García
- Department of Biosciences, Faculty of Chemistry, University of Cuenca, Cuenca, Azuay, Ecuador
| | - Angélica M Ochoa-Avilés
- Department of Biosciences, Faculty of Chemistry, University of Cuenca, Cuenca, Azuay, Ecuador
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Plaza MP, Alcázar P, Oteros J, Galán C. Atmospheric pollutants and their association with olive and grass aeroallergen concentrations in Córdoba (Spain). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:45447-45459. [PMID: 32789634 PMCID: PMC8197725 DOI: 10.1007/s11356-020-10422-x] [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: 02/16/2020] [Accepted: 08/06/2020] [Indexed: 05/07/2023]
Abstract
Cumulative data indicate that pollen grains and air pollution reciprocally interact. Climate changes seem also to influence pollen allergenicity. Depending on the plant species and on the pollutant type and concentration, this interaction may modify the features and metabolism of the pollen grain. Previous results revealed a significant positive correlation between pollen and aeroallergen, even using two different samplers. However, some discrepancy days have been also detected with low pollen but high aeroallergen concentrations. The main aim of the present paper is to find how the environmental factors, and specially pollutants, could affect the amount of allergens from olive and grass airborne pollen. Pollen grains were collected by a Hirst-type volumetric spore trap. Aeroallergen was simultaneously sampled by a low-volume Cyclone Burkard sampler. Phl p 5 and Ole e 1 aeroallergen were quantified by double-sandwich ELISA test. The data related to air pollutants, pollen grains, and aeroallergens were analyzed with descriptive statistic. Spearman's correlation test was used to identify potential correlations between these variables. There is a significant positive correlation between aeroallergens and airborne pollen concentrations, in both studied pollen types, so allergen concentrations could be explained with the pollen concentration. The days with unlinked events coincide between olive and grass allergens. Nevertheless, concerning to our results, pollutants do not affect the amount of allergens per pollen. Even if diverse pollutants show an unclear relationship with the allergen concentration, this association seems to be a casual effect of the leading role of some meteorological parameters.
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Affiliation(s)
- Maria Pilar Plaza
- Chair and Institute of Environmental Medicine, UNIKA-T, University of Augsburg - Technical University of Munich (TUM) and Helmholtz Zentrum München, Neusässer Str. 47, 86156, Augsburg, Germany.
- Department of Botany, Ecology and Plant Physiology, University of Córdoba (UCO), Córdoba, Spain.
| | - Purificación Alcázar
- Department of Botany, Ecology and Plant Physiology, University of Córdoba (UCO), Córdoba, Spain
| | - José Oteros
- Department of Botany, Ecology and Plant Physiology, University of Córdoba (UCO), Córdoba, Spain
- Center of Allergy & Environment (ZAUM), Member of the German Center for Lung Research (DZL), Technische Universität München/Helmholtz Center, Munich, Germany
| | - Carmen Galán
- Department of Botany, Ecology and Plant Physiology, University of Córdoba (UCO), Córdoba, Spain
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Davies JM, Berman D, Beggs PJ, Ramón GD, Peter J, Katelaris CH, Ziska LH. Global Climate Change and Pollen Aeroallergens: A Southern Hemisphere Perspective. Immunol Allergy Clin North Am 2020; 41:1-16. [PMID: 33228867 DOI: 10.1016/j.iac.2020.09.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Climatic change will have an impact on production and release of pollen, with consequences for the duration and magnitude of aeroallergen seasonal exposure and allergic diseases. Evaluations of pollen aerobiology in the southern hemisphere have been limited by resourcing and the density of monitoring sites. This review emphasizes inconsistencies in pollen monitoring methods and metrics used globally. Research should consider unique southern hemisphere biodiversity, climate, plant distributions, standardization of pollen aerobiology, automation, and environmental integration. For both hemispheres, there is a clear need for better understanding of likely influences of climate change and comprehending their impact on pollen-related health outcomes.
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Affiliation(s)
- Janet M Davies
- School of Biomedical Science, Queensland University of Technology, Herston, Queensland 4006, Australia; Office of Research, Metro North Hospital and Health Service, Herston, Queensland 4006, Australia.
| | - Dilys Berman
- Allergy and Immunology Unit, University of Cape Town Lung Institute, Cape Town 7700, South Africa
| | - Paul J Beggs
- Department of Earth and Environmental Sciences, Faculty of Science and Engineering, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Germán Darío Ramón
- Hospital Italiano Regional DelSur, Bahía Blanca, Buenos Aires, Argentina
| | - Jonny Peter
- Division of Allergy and Clinical Immunology, Department of Medicine, Groote Schuur Hospital, University of Cape Town, 7700
- PO Box 34560, 7937, South Africa; Allergy and Immunology Unit, University of Cape Town Lung Institute, George Street, Cape Town, South Africa
| | | | - Lewis H Ziska
- Mailman School of Public Health, Columbia University, New York, NY 10032, USA
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50
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The Role of Extreme Weather and Climate-Related Events on Asthma Outcomes. Immunol Allergy Clin North Am 2020; 41:73-84. [PMID: 33228874 DOI: 10.1016/j.iac.2020.09.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Extreme weather and climate events are likely to increase in frequency and severity as a consequence of global climate change. These are events that can include flooding rains, prolonged heat waves, drought, wildfires, hurricanes, severe thunderstorms, tornadoes, storm surge, and coastal flooding. It is important to consider these events as they are not merely meteorologic occurrences but are linked to our health. We aim to address how these events are interconnected with asthma outcomes associated with thunderstorm asthma, pollen production, mold infestation from flooding events, and poor air quality during wildfires.
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