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Wang Z, Dalton KR, Lee M, Parks CG, Beane Freeman LE, Zhu Q, González A, Knight R, Zhao S, Motsinger-Reif AA, London SJ. Metagenomics reveals novel microbial signatures of farm exposures in house dust. Front Microbiol 2023; 14:1202194. [PMID: 37415812 PMCID: PMC10321240 DOI: 10.3389/fmicb.2023.1202194] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 05/26/2023] [Indexed: 07/08/2023] Open
Abstract
Indoor home dust microbial communities, important contributors to human health, are shaped by environmental factors, including farm-related exposures. Advanced metagenomic whole genome shotgun sequencing (WGS) improves detection and characterization of microbiota in the indoor built-environment dust microbiome, compared to conventional 16S rRNA amplicon sequencing (16S). We hypothesized that the improved characterization of indoor dust microbial communities by WGS will enhance detection of exposure-outcome associations. The objective of this study was to identify novel associations of environmental exposures with the dust microbiome from the homes of 781 farmers and farm spouses enrolled in the Agricultural Lung Health Study. We examined various farm-related exposures, including living on a farm, crop versus animal production, and type of animal production, as well as non-farm exposures, including home cleanliness and indoor pets. We assessed the association of the exposures on within-sample alpha diversity and between-sample beta diversity, and the differential abundance of specific microbes by exposure. Results were compared to previous findings using 16S. We found most farm exposures were significantly positively associated with both alpha and beta diversity. Many microbes exhibited differential abundance related to farm exposures, mainly in the phyla Actinobacteria, Bacteroidetes, Firmicutes, and Proteobacteria. The identification of novel differential taxa associated with farming at the genera level, including Rhodococcus, Bifidobacterium, Corynebacterium, and Pseudomonas, was a benefit of WGS compared to 16S. Our findings indicate that characterization of dust microbiota, an important component of the indoor environment relevant to human health, is heavily influenced by sequencing techniques. WGS is a powerful tool to survey the microbial community that provides novel insights on the impact of environmental exposures on indoor dust microbiota. These findings can inform the design of future studies in environmental health.
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Affiliation(s)
- Ziyue Wang
- Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, NC, United States
| | - Kathryn R. Dalton
- Genomics and the Environment in Respiratory and Allergic Health Group, Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, NC, United States
| | - Mikyeong Lee
- Genomics and the Environment in Respiratory and Allergic Health Group, Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, NC, United States
| | - Christine G. Parks
- Genomics and the Environment in Respiratory and Allergic Health Group, Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, NC, United States
| | - Laura E. Beane Freeman
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - Qiyun Zhu
- School of Life Sciences, Biodesign Center for Fundamental and Applied Microbiomics, Arizona State University, Tempe, AZ, United States
| | - Antonio González
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, United States
| | - Rob Knight
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, United States
- Center for Microbiome Innovation, University of California, San Diego, La Jolla, CA, United States
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, United States
- Department of Computer Science and Engineering, University of California, San Diego, La Jolla, CA, United States
| | - Shanshan Zhao
- Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, NC, United States
| | - Alison A. Motsinger-Reif
- Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, NC, United States
| | - Stephanie J. London
- Genomics and the Environment in Respiratory and Allergic Health Group, Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, NC, United States
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2
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Amin H, Marshall IPG, Bertelsen RJ, Wouters IM, Schlünssen V, Sigsgaard T, Šantl-Temkiv T. Optimization of bacterial DNA and endotoxin extraction from settled airborne dust. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159455. [PMID: 36252657 DOI: 10.1016/j.scitotenv.2022.159455] [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: 07/29/2022] [Revised: 10/03/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Collecting and obtaining sufficient amount of airborne particles for multiple microbial component assessments can be challenging. A passive dust sampling device, the electrostatic dust fall collector (EDC) has been established for assessing airborne exposures including endotoxin and glucans. Recently, with advances in next-generation sequencing techniques, EDCs were used to collect microbial cells for DNA sequencing analysis to promote the study of airborne bacterial and fungal communities. However, low DNA yields have been problematic when employing passive sampling with EDC. To address this challenge, we attempted to increase the efficiency of extraction. We compared DNA extraction efficiency of bacterial components from EDCs captured on filters through filtration using five extraction techniques. By measuring the abundance, diversity and structure of bacterial communities using qPCR and amplicon sequencing targeting 16S rRNA genes, we found that two techniques outperformed the rest. Furthermore, we developed protocols to simultaneously extract both DNA and endotoxin from a single EDC cloth. Our technique promotes a high quality to price ratio and may be employed in large epidemiological studies addressing airborne bacterial exposure where a large number of samples is needed.
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Affiliation(s)
- Hesham Amin
- Department of Clinical Science, University of Bergen, Bergen, Norway.
| | - Ian P G Marshall
- Section for Microbiology, Department of Biology, Aarhus University, Aarhus, Denmark
| | - Randi J Bertelsen
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Inge M Wouters
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Vivi Schlünssen
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Torben Sigsgaard
- Department of Public Health, Environment, Work and Health, Danish Ramazzini Centre, Aarhus University, Aarhus, Denmark
| | - Tina Šantl-Temkiv
- Section for Microbiology, Department of Biology, Aarhus University, Aarhus, Denmark
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3
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Kelly MS, Bunyavanich S, Phipatanakul W, Lai PS. The Environmental Microbiome, Allergic Disease, and Asthma. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2022; 10:2206-2217.e1. [PMID: 35750322 PMCID: PMC9704440 DOI: 10.1016/j.jaip.2022.06.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 05/24/2022] [Accepted: 06/03/2022] [Indexed: 04/26/2023]
Abstract
The environmental microbiome represents the entirety of the microbes and their metabolites that we encounter in our environments. A growing body of evidence supports the role of the environmental microbiome in risk for and severity of allergic diseases and asthma. The environmental microbiome represents a ubiquitous, lifelong exposure to non-self antigens. During the critical window between birth and 1 year of life, interactions between our early immune system and the environmental microbiome have 2 consequences: our individual microbiome is populated by environmental microbes, and our immune system is trained regarding which antigens to tolerate. During this time, a diversity of exposures appears largely protective, dramatically decreasing the risk of developing allergic diseases and asthma. As we grow older, our interactions with the environmental microbiome change. While it continues to exert influence over the composition of the human microbiome, the environmental microbiome becomes increasingly a source for antigenic stimulation and infection. The same microbial exposure protective against disease development may exacerbate disease severity. Although much has been learned about the importance of the environmental microbiome in allergic disease, much more remains to be understood about these complicated interactions between our environment, our microbiome, our immune system, and disease.
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Affiliation(s)
- Michael S Kelly
- Department of Internal Medicine, Massachusetts General Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | - Supinda Bunyavanich
- Division of Allergy and Immunology, Department of Pediatrics, and Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Wanda Phipatanakul
- Harvard Medical School, Boston, Mass; Division of Allergy and Immunology, Boston Children's Hospital, Boston, Mass
| | - Peggy S Lai
- Department of Internal Medicine, Massachusetts General Hospital, Boston, Mass; Harvard Medical School, Boston, Mass; Division of Allergy and Immunology, Boston Children's Hospital, Boston, Mass; Division of Pulmonary and Critical Care, Massachusetts General Hospital, Boston, Mass; Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Mass.
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4
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Mortelliti CL, Banzon TM, Phipatanakul W, Vieira CZ. Environmental Exposures Impact Pediatric Asthma Within the School Environment. Immunol Allergy Clin North Am 2022; 42:743-760. [DOI: 10.1016/j.iac.2022.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Chong-Neto HJ, D'amato G, Rosário Filho NA. Impact of the environment on the microbiome. J Pediatr (Rio J) 2022; 98 Suppl 1:S32-S37. [PMID: 34742719 PMCID: PMC9510925 DOI: 10.1016/j.jped.2021.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 10/01/2021] [Accepted: 10/01/2021] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES This review aimed to verify indoor and outdoor pollution, host and environmental microbiome, and the impact on the health of the pediatric population. SOURCES A review of the literature, non-systematic, with the search for articles since 2001 in PubMed with the terms "pollution" AND "microbiome" AND "children's health" AND "COVID-19". SUMMARY OF THE FINDINGS Prevention of allergic diseases includes the following aspects: avoid cesarean delivery, the unnecessary overuse of antibiotics, air pollution, smoking in pregnancy and second-hand tobacco smoke, stimulate breastfeeding, soil connection, consume fresh fruits and vegetables, exercise and outdoor activities and animal contact. The children's microbiota richness and diversity decrease the risk of immune disbalance and allergic disease development. CONCLUSIONS Lifestyle and exposure to pollutants, both biological and non-biological, modify the host and the environment microbiome provoking an immune disbalance with inflammatory consequences and development of allergic diseases.
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Affiliation(s)
| | - Gennaro D'amato
- Federico II University, School of Specialization in Respiratory Diseases, High Specialty Hospital A. Cardarelli, Division of Respiratory and Allergic Diseases, Naples, NA, Italy
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Sallard E, Schult F, Baehren C, Buedding E, Mboma O, Ahmad-Nejad P, Ghebremedhin B, Ehrhardt A, Wirth S, Aydin M. Viral Infection and Respiratory Exacerbation in Children: Results from a Local German Pediatric Exacerbation Cohort. Viruses 2022; 14:v14030491. [PMID: 35336898 PMCID: PMC8955305 DOI: 10.3390/v14030491] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 02/20/2022] [Accepted: 02/23/2022] [Indexed: 02/05/2023] Open
Abstract
Respiratory viruses play an important role in asthma exacerbation, and early exposure can be involved in recurrent bronchitis and the development of asthma. The exact mechanism is not fully clarified, and pathogen-to-host interaction studies are warranted to identify biomarkers of exacerbation in the early phase. Only a limited number of international exacerbation cohorts were studied. Here, we have established a local pediatric exacerbation study in Germany consisting of children with asthma or chronic, recurrent bronchitis and analyzed the viriome within the nasopharyngeal swab specimens derived from the entire cohort (n = 141). Interestingly, 41% of exacerbated children had a positive test result for human rhinovirus (HRV)/human enterovirus (HEV), and 14% were positive for respiratory syncytial virus (RSV). HRV was particularly prevalent in asthmatics (56%), wheezers (50%), and atopic (66%) patients. Lymphocytes were decreased in asthmatics and in HRV-infected subjects, and patients allergic to house dust mites were more susceptible to HRV infection. Our study thus confirms HRV infection as a strong ‘biomarker’ of exacerbated asthma. Further longitudinal studies will show the clinical progress of those children with a history of an RSV or HRV infection. Vaccination strategies and novel treatment guidelines against HRV are urgently needed to protect those high-risk children from a serious course of disease.
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Affiliation(s)
- Erwan Sallard
- Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Institute of Virology and Microbiology, Witten/Herdecke University, 58453 Witten, Germany; (E.S.); (A.E.)
| | - Frank Schult
- Center for Child and Adolescent Medicine, Center for Clinical and Translational Research (CCTR), Helios University Hospital Wuppertal, Witten/Herdecke University, 42283 Wuppertal, Germany; (F.S.); (O.M.); (S.W.)
| | - Carolin Baehren
- Laboratory of Experimental Pediatric Pneumology and Allergology, Center for Biomedical Education and Research, Faculty of Health, School of Life Sciences (ZBAF), Witten/Herdecke University, 58455 Witten, Germany; (C.B.); (E.B.)
| | - Eleni Buedding
- Laboratory of Experimental Pediatric Pneumology and Allergology, Center for Biomedical Education and Research, Faculty of Health, School of Life Sciences (ZBAF), Witten/Herdecke University, 58455 Witten, Germany; (C.B.); (E.B.)
| | - Olivier Mboma
- Center for Child and Adolescent Medicine, Center for Clinical and Translational Research (CCTR), Helios University Hospital Wuppertal, Witten/Herdecke University, 42283 Wuppertal, Germany; (F.S.); (O.M.); (S.W.)
| | - Parviz Ahmad-Nejad
- Institute for Medical Laboratory Diagnostics, Center for Clinical and Translational Research (CCTR), Helios University Hospital Wuppertal, Witten/Herdecke University, 42283 Wuppertal, Germany;
| | - Beniam Ghebremedhin
- Institute for Medical Laboratory Diagnostics, Center for Clinical and Translational Research (CCTR), Helios University Hospital Wuppertal, Witten/Herdecke University, 42283 Wuppertal, Germany;
| | - Anja Ehrhardt
- Center for Biomedical Education and Research (ZBAF), Department of Human Medicine, Faculty of Health, Institute of Virology and Microbiology, Witten/Herdecke University, 58453 Witten, Germany; (E.S.); (A.E.)
| | - Stefan Wirth
- Center for Child and Adolescent Medicine, Center for Clinical and Translational Research (CCTR), Helios University Hospital Wuppertal, Witten/Herdecke University, 42283 Wuppertal, Germany; (F.S.); (O.M.); (S.W.)
| | - Malik Aydin
- Center for Child and Adolescent Medicine, Center for Clinical and Translational Research (CCTR), Helios University Hospital Wuppertal, Witten/Herdecke University, 42283 Wuppertal, Germany; (F.S.); (O.M.); (S.W.)
- Laboratory of Experimental Pediatric Pneumology and Allergology, Center for Biomedical Education and Research, Faculty of Health, School of Life Sciences (ZBAF), Witten/Herdecke University, 58455 Witten, Germany; (C.B.); (E.B.)
- Correspondence: ; Tel.: +49-(0)-202-896-2384; Fax: +49-(0)-202-896-3834
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7
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Adams RI, Leppänen H, Karvonen AM, Jacobs J, Borràs-Santos A, Valkonen M, Krop E, Haverinen-Shaughnessy U, Huttunen K, Zock JP, Hyvärinen A, Heederik D, Pekkanen J, Täubel M. Microbial exposures in moisture-damaged schools and associations with respiratory symptoms in students: A multi-country environmental exposure study. INDOOR AIR 2021; 31:1952-1966. [PMID: 34151461 DOI: 10.1111/ina.12865] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 04/20/2021] [Accepted: 05/19/2021] [Indexed: 06/13/2023]
Abstract
Moisture-damaged buildings are associated with respiratory symptoms and underlying diseases among building occupants, but the causative agent(s) remain a mystery. We first identified specific fungal and bacterial taxa in classrooms with moisture damage in Finnish and Dutch primary schools. We then investigated associations of the identified moisture damage indicators with respiratory symptoms in more than 2700 students. Finally, we explored whether exposure to specific taxa within the indoor microbiota may explain the association between moisture damage and respiratory health. Schools were assessed for moisture damage through detailed inspections, and the microbial composition of settled dust in electrostatic dustfall collectors was determined using marker-gene analysis. In Finland, there were several positive associations between particular microbial indicators (diversity, richness, individual taxa) and a respiratory symptom score, while in the Netherlands, the associations tended to be mostly inverse and statistically non-significant. In Finland, abundance of the Sphingomonas bacterial genus and endotoxin levels partially explained the associations between moisture damage and symptom score. A few microbial taxa explained part of the associations with health, but overall, the observed associations between damage-associated individual taxa and respiratory health were limited.
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Affiliation(s)
- Rachel I Adams
- California Department of Public Health, Richmond, CA, USA
| | - Hanna Leppänen
- Environmental Health Unit, Finnish Institute for Health and Welfare, Kuopio, Finland
| | - Anne M Karvonen
- Environmental Health Unit, Finnish Institute for Health and Welfare, Kuopio, Finland
| | - José Jacobs
- Institute for Risk Assessment Sciences (IRAS, Utrecht University, Utrecht, The Netherlands
| | - Alicia Borràs-Santos
- Barcelona Institute for Global Health (ISGlobal, Barcelona, Spain
- Escola Universitària d'Infermeria, Escoles Universitàries Gimbernat, Universitat Autònoma de Barcelona, Sant Cugat del Vallès, Spain
| | - Maria Valkonen
- Environmental Health Unit, Finnish Institute for Health and Welfare, Kuopio, Finland
| | - Esmeralda Krop
- Institute for Risk Assessment Sciences (IRAS, Utrecht University, Utrecht, The Netherlands
| | | | - Kati Huttunen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Jan-Paul Zock
- Barcelona Institute for Global Health (ISGlobal, Barcelona, Spain
| | - Anne Hyvärinen
- Environmental Health Unit, Finnish Institute for Health and Welfare, Kuopio, Finland
| | - Dick Heederik
- Institute for Risk Assessment Sciences (IRAS, Utrecht University, Utrecht, The Netherlands
| | - Juha Pekkanen
- Environmental Health Unit, Finnish Institute for Health and Welfare, Kuopio, Finland
- Department of Public Health, Helsinki University, Helsinki, Finland
| | - Martin Täubel
- Environmental Health Unit, Finnish Institute for Health and Welfare, Kuopio, Finland
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8
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Indoor Microbial Exposures and Chronic Lung Disease: From Microbial Toxins to the Microbiome. Clin Chest Med 2021; 41:777-796. [PMID: 33153695 DOI: 10.1016/j.ccm.2020.08.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Effects of environmental microbial exposures on human health have long been of interest. Microbes were historically assumed to be harmful, but data have suggested that microbial exposures can modulate the immune system. We focus on the effects of indoor environmental microbial exposure on chronic lung diseases. We found contradictory data in bacterial studies using endotoxin as a surrogate for bacterial exposure. Contradictory data also exist in studies of fungal exposure. Many factors may modulate the effect of environmental microbial exposures on lung health, including coexposures. Future studies need to clarify which method of assessing environmental microbial exposures is most relevant.
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9
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Gut Microbiota: the Emerging Link to Lung Homeostasis and Disease. J Bacteriol 2021; 203:JB.00454-20. [PMID: 33077630 DOI: 10.1128/jb.00454-20] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The gut microbiota plays a crucial role in the development of the immune system and confers benefits or disease susceptibility to the host. Emerging studies have indicated the gut microbiota could affect pulmonary health and disease through cross talk between the gut microbiota and the lungs. Gut microbiota dysbiosis could lead to acute or chronic lung disease, such as asthma, tuberculosis, and lung cancer. In addition, the composition of the gut microbiota may be associated with different lung diseases, the prevalence of which also varies by age. Modulation of the gut microbiota through short-chain fatty acids, probiotics, and micronutrients may present potential therapeutic strategies to protect against lung diseases. In this review, we will provide an overview of the cross-talk between the gut microbiota and the lungs, as well as elucidate the underlying pathogenesis and/or potential therapeutic strategies of some lung diseases from the point of view of the gut microbiota.
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10
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Park JH, Lemons AR, Roseman J, Green BJ, Cox-Ganser JM. Bacterial community assemblages in classroom floor dust of 50 public schools in a large city: characterization using 16S rRNA sequences and associations with environmental factors. MICROBIOME 2021; 9:15. [PMID: 33472703 PMCID: PMC7819239 DOI: 10.1186/s40168-020-00954-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 12/06/2020] [Indexed: 05/10/2023]
Abstract
Characterizing indoor microbial communities using molecular methods provides insight into bacterial assemblages present in environments that can influence occupants' health. We conducted an environmental assessment as part of an epidemiologic study of 50 elementary schools in a large city in the northeastern USA. We vacuumed dust from the edges of the floor in 500 classrooms accounting for 499 processed dust aliquots for 16S Illumina MiSeq sequencing to characterize bacterial assemblages. DNA sequences were organized into operational taxonomic units (OTUs) and identified using a database derived from the National Center for Biotechnology Information. Bacterial diversity and ecological analyses were performed at the genus level. We identified 29 phyla, 57 classes, 148 orders, 320 families, 1193 genera, and 2045 species in 3073 OTUs. The number of genera per school ranged from 470 to 705. The phylum Proteobacteria was richest of all while Firmicutes was most abundant. The most abundant order included Lactobacillales, Spirulinales, and Clostridiales. Halospirulina was the most abundant genus, which has never been reported from any school studies before. Gram-negative bacteria were more abundant and richer (relative abundance = 0.53; 1632 OTUs) than gram-positive bacteria (0.47; 1441). Outdoor environment-associated genera were identified in greater abundance in the classrooms, in contrast to homes where human-associated bacteria are typically more abundant. Effects of school location, degree of water damage, building condition, number of students, air temperature and humidity, floor material, and classroom's floor level on the bacterial richness or community composition were statistically significant but subtle, indicating relative stability of classroom microbiome from environmental stress. Our study indicates that classroom floor dust had a characteristic bacterial community that is different from typical house dust represented by more gram-positive and human-associated bacteria. Health implications of exposure to the microbiomes in classroom floor dust may be different from those in homes for school staff and students. Video abstract.
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Affiliation(s)
- Ju-Hyeong Park
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, WV, USA.
| | - Angela R Lemons
- Health Effect Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Jerry Roseman
- Philadelphia Federation of Teachers Health & Welfare Fund & Union, Philadelphia, PA, USA
| | - Brett J Green
- Health Effect Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Jean M Cox-Ganser
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, WV, USA
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11
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Sui HY, Weil AA, Nuwagira E, Qadri F, Ryan ET, Mezzari MP, Phipatanakul W, Lai PS. Impact of DNA Extraction Method on Variation in Human and Built Environment Microbial Community and Functional Profiles Assessed by Shotgun Metagenomics Sequencing. Front Microbiol 2020; 11:953. [PMID: 32528434 PMCID: PMC7262970 DOI: 10.3389/fmicb.2020.00953] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 04/21/2020] [Indexed: 12/26/2022] Open
Abstract
Both the host microbiome and the microbiome of the built environment can have profound impacts on human health. While prior studies have suggested that the variability introduced by DNA extraction method is less than typical biologic variation, most studies have focused on 16S rRNA amplicon sequencing or on high biomass fecal samples. Shotgun metagenomic sequencing provides advantages over amplicon sequencing for surveying the microbiome, but is a challenge to perform in lower microbial biomass samples with high human DNA content such as sputum or vacuumed dust. Here we systematically evaluate the impact of four different extraction methods (phenol:choloroform, and three high-throughput kit-based approaches, the Promega Maxwell gDNA, Qiagen MagAttract PowerSoil DNA, and ZymoBIOMICS 96 MagBead). We report the variation in microbial community structure and predicted microbial function assessed by shotgun metagenomics sequencing in human stool, sputum, and vacuumed dust obtained from ongoing cohort studies or clinical trials. The same beadbeating protocol was used for all samples to focus our evaluation on the impact of kit chemistries on sequencing results. DNA yield was overall highest in the phenol:choloroform and Promega approaches. Only the phenol:choloroform approach showed evidence of contamination in negative controls. Bias was evaluated using mock community controls, and was noted across all extraction methods, although Promega exhibited the least amount of bias. The extraction method did not impact the proportion of human reads, although stool had the lowest proportion of human reads (0.1%) as compared to dust (44.1%) and sputum (80%). We calculated Bray-Curtis dissimilarity and Aitchison distances to evaluate the impact of extraction method on microbial community structure by sample type. Extraction method had the lowest impact in stool (extraction method responsible for 3.0-3.9% of the variability), the most impact in vacuumed dust (12-16% of the variability) and intermediate values for sputum (9.2-12% variability). Similar differences were noted when evaluating microbial community function. Our results will inform investigators planning microbiome studies using diverse sample types in large clinical studies. A consistent DNA extraction approach across all sample types is recommended, particularly with lower microbial biomass samples that are more heavily influenced by extraction method.
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Affiliation(s)
- Hui-yu Sui
- Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Boston, MA, United States
| | - Ana A. Weil
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, United States,Harvard Medical School, Boston, MA, United States
| | - Edwin Nuwagira
- Mbarara University of Science and Technology, Mbarara, Uganda
| | - Firdausi Qadri
- Infectious Diseases Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Edward T. Ryan
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, United States,Harvard Medical School, Boston, MA, United States
| | - Melissa P. Mezzari
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, United States
| | - Wanda Phipatanakul
- Harvard Medical School, Boston, MA, United States,Division of Immunology, Boston Children’s Hospital, Boston, MA, United States
| | - Peggy S. Lai
- Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Boston, MA, United States,Harvard Medical School, Boston, MA, United States,Division of Immunology, Boston Children’s Hospital, Boston, MA, United States,*Correspondence: Peggy S. Lai, ;
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12
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Cavaleiro Rufo J, Ribeiro AI, Paciência I, Delgado L, Moreira A. The influence of species richness in primary school surroundings on children lung function and allergic disease development. Pediatr Allergy Immunol 2020; 31:358-363. [PMID: 31943397 DOI: 10.1111/pai.13213] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 12/13/2019] [Accepted: 12/20/2019] [Indexed: 12/27/2022]
Abstract
BACKGROUND Primary schools represent important environments for biodiversity exposure and thus may play a crucial role on early-life immunomodulation, protecting against allergic sensitization. The aim of this study was to understand how the exposure to different levels of species richness surrounding urban primary schools may influence the development of allergic diseases and asthma in children. METHODS A species richness index (SRI), evaluating habitat diversity in terms of amphibians, birds, reptiles, and small mammals, was estimated and attributed to 20 primary schools in the city of Porto, Portugal. The SRI was measured considering a 100 m straight-line buffer around the schools. Children who attended the participating schools were invited to participate in the study, performed spirometry with bronchodilation and skin-prick tests, and had their parents fill a questionnaire concerning allergy and asthma symptoms, as well as demographic and socioeconomic data. Asthma was defined according to three distinct criteria. RESULTS The study results showed significant and positive associations between the exposure to species richness in schools and the forced expiratory volume at the first second (FEV1 ) and forced vital capacity (FVC) parameters both before and after bronchodilation, independently of the asthma and atopic status. Fully adjusted models revealed that a unitary increment in the SRI was associated with an average increase of approximately 2 and 3 mL in FEV1 and FVC, respectively. CONCLUSION Species richness in school surroundings may impact lung function development in children. However, this increase in lung function was not associated with any clinically relevant protective effect on allergy and asthma development.
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Affiliation(s)
- João Cavaleiro Rufo
- EPIUnit, Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal.,Serviço e Laboratório de Imunologia Básica e Clínica, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - Ana Isabel Ribeiro
- EPIUnit, Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal.,Departamento de Ciências da Saúde Pública e Forenses e Educação Médica, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - Inês Paciência
- EPIUnit, Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal.,Serviço e Laboratório de Imunologia Básica e Clínica, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - Luís Delgado
- Serviço e Laboratório de Imunologia Básica e Clínica, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - André Moreira
- EPIUnit, Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal.,Serviço e Laboratório de Imunologia Básica e Clínica, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
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Abstract
PURPOSE OF REVIEW Recent evidence suggests that environmental exposures change the adult human microbiome. Here, we review recent evidence on the impact of the work microbiome and work-related chemical, metal and particulate exposures on the human microbiome. RECENT FINDINGS Prior literature on occupational microbial exposures has focused mainly on the respiratory effects of endotoxin, but a recent study suggests that not all endotoxin is the same; endotoxin from some species is proinflammatory, whereas endotoxin from other species is anti-inflammatory. Work with animals can change the adult human microbiome, likely through colonization. Early studies in military personnel and animal models of gulf war illness show that military exposures change the gut microbiome and increase gut permeability. Heavy metal and particulate matter exposure, which are often elevated in occupational settings, also change the gut microbiome. SUMMARY An emerging body of literature shows that work-related exposures can change the human microbiome. The health effects of these changes are currently not well studied. If work exposures lead to disease through alterations in the human microbiome, exposure cessation without addressing changes to the human microbiome may be ineffective for disease prevention and treatment.
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14
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Louisias M, Ramadan A, Naja AS, Phipatanakul W. The Effects of the Environment on Asthma Disease Activity. Immunol Allergy Clin North Am 2019; 39:163-175. [PMID: 30954168 DOI: 10.1016/j.iac.2018.12.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Asthma is highly prevalent and causes significant morbidity in children. The development of asthma depends on complex relationships between genetic predisposition and environmental modifiers of immune function. The biological and physical environmental factors include aeroallergens, microbiome, endotoxin, genetics, and pollutants. The psychosocial environment encompasses stress, neighborhood safety, housing, and discrimination. They all have been speculated to influence asthma control and the risk of developing asthma. Control of the factors that contribute to or aggravate symptoms, interventions to eliminate allergen exposure, guidelines-based pharmacologic therapy, and education of children and their caregivers are of paramount importance.
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Affiliation(s)
- Margee Louisias
- Division of Allergy and Immunology, Boston Children's Hospital, Harvard Medical School, 300 Longwood Avenue, Fegan Building, 6th floor, Boston, MA 02115, USA; Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Boston, MA, USA
| | - Amira Ramadan
- Division of Allergy and Immunology, Boston Children's Hospital, 300 Longwood Avenue, Fegan Building, 6th Floor, Boston, MA 02115, USA; Beth Israel Deaconess Medical Center, Boston, MA
| | - Ahmad Salaheddine Naja
- Division of Allergy and Immunology, Boston Children's Hospital, 300 Longwood Avenue, Fegan Building, 6th Floor, Boston, MA 02115, USA; Lebanese American University, Beirut, Lebanon
| | - Wanda Phipatanakul
- Division of Allergy and Immunology, Boston Children's Hospital, Harvard Medical School, 300 Longwood Avenue, Fegan Building, 6th floor, Boston, MA 02115, USA.
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15
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Abstract
Childhood asthma affects many children placing them at significant risk for health care utilization and school absences. Several new developments relevant to the field of pediatric asthma have occurred over the last 5 years; yet, there is much more to learn. It is poorly understood how to prevent the disease, optimally address environmental challenges, or effectively manage poor adherence. Moreover, it is not clear how to customize therapy by asthma phenotype, age group, high risk groups, or severity of disease. Highlights of advances in pediatric asthma are reviewed and multiple essential areas for further exploration and research are discussed.
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16
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Bacharier LB, Mori A, Kita H. Advances in asthma, asthma-COPD overlap, and related biologics in 2018. J Allergy Clin Immunol 2019; 144:906-919. [PMID: 31476323 DOI: 10.1016/j.jaci.2019.08.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/23/2019] [Accepted: 08/26/2019] [Indexed: 01/14/2023]
Abstract
Over the past year, numerous important advances in our understanding of multiple aspects of asthma, ranging from disease pathogenesis to epidemiology to therapeutics, have been reported. This review is a compilation of highlights from articles published largely in the Journal of Allergy and Clinical Immunology and supplemented by articles published elsewhere that have substantially advanced the fields of asthma, chronic obstructive pulmonary disease (COPD), and asthma-COPD overlap and biologic therapies for these disorders. The intention of this article is not to provide a comprehensive review but rather to focus on several areas that have developed quickly and/or received extensive attention from our readers.
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Affiliation(s)
- Leonard B Bacharier
- Division of Pediatric Allergy, Immunology and Pulmonary Medicine, Department of Pediatrics, Washington University School of Medicine and St Louis Children's Hospital, St Louis, Mo.
| | - Akio Mori
- Department of Advanced Medicine, Clinical Research Center for Allergy and Rheumatology, National Hospital Organization Sagamihara National Hospital, Sagamihara, Japan
| | - Hirohito Kita
- Division of Allergic Diseases, Department of Medicine and Department of Immunology, Mayo Clinic, Rochester, Minn; Division of Allergic Diseases, Department of Medicine and Department of Immunology, Mayo Clinic, Scottsdale
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17
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Agache I, Miller R, Gern JE, Hellings PW, Jutel M, Muraro A, Phipatanakul W, Quirce S, Peden D. Emerging concepts and challenges in implementing the exposome paradigm in allergic diseases and asthma: a Practall document. Allergy 2019; 74:449-463. [PMID: 30515837 DOI: 10.1111/all.13690] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 11/27/2018] [Indexed: 12/21/2022]
Abstract
Exposome research can improve the understanding of the mechanistic connections between exposures and health to help mitigate adverse health outcomes across the life span. The exposomic approach provides a risk profile instead of single predictors and thus is particularly applicable to allergic diseases and asthma. Under the PRACTALL collaboration between the European Academy of Allergy and Clinical Immunology (EAACI) and the American Academy of Allergy, Asthma, and Immunology (AAAAI), we evaluated the current concepts and the unmet needs on the role of the exposome in allergic diseases and asthma.
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Affiliation(s)
- Ioana Agache
- Faculty of Medicine; Transylvania University; Brasov Romania
| | - Rachel Miller
- Columbia University Medical Center; New York New York
| | - James E. Gern
- School of Medicine and Public Health; University of Wisconsin; Madison Wisconsin
| | - Peter W. Hellings
- Department of Otorhinolaryngology; University Hospitals Leuven; Leuven Belgium
- Department of Otorhinolaryngology; Academic Medical Center; Amsterdam The Netherlands
| | - Marek Jutel
- Wroclaw Medical University; Wrocław Poland
- ALL-MED Medical Research Institute; Wroclaw Poland
| | - Antonella Muraro
- Food Allergy Referral Centre; Department of Woman and Child Health; Padua University hospital; Padua Italy
| | - Wanda Phipatanakul
- Harvard Medical School; Boston Children's Hospital; Boston Massachusetts
| | - Santiago Quirce
- Department of Allergy; Hospital La Paz Institute for Health Research and CIBER of Respiratory Diseases (CIBERES); Madrid Spain
| | - David Peden
- UNC School of Medicine; Chapel Hill North Carolina
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18
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The Role of the Microbiome in Asthma: The Gut⁻Lung Axis. Int J Mol Sci 2018; 20:ijms20010123. [PMID: 30598019 PMCID: PMC6337651 DOI: 10.3390/ijms20010123] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 12/22/2018] [Accepted: 12/27/2018] [Indexed: 12/14/2022] Open
Abstract
Asthma is one of the most common chronic respiratory diseases worldwide. It affects all ages but frequently begins in childhood. Initiation and exacerbations may depend on individual susceptibility, viral infections, allergen exposure, tobacco smoke exposure, and outdoor air pollution. The aim of this review was to analyze the role of the gut⁻lung axis in asthma development, considering all asthma phenotypes, and to evaluate whether microbe-based therapies may be used for asthma prevention. Several studies have confirmed the role of microbiota in the regulation of immune function and the development of atopy and asthma. These clinical conditions have apparent roots in an insufficiency of early life exposure to the diverse environmental microbiota necessary to ensure colonization of the gastrointestinal and/or respiratory tracts. Commensal microbes are necessary for the induction of a balanced, tolerogenic immune system. The identification of commensal bacteria in both the gastroenteric and respiratory tracts could be an innovative and important issue. In conclusion, the function of microbiota in healthy immune response is generally acknowledged, and gut dysbacteriosis might result in chronic inflammatory respiratory disorders, particularly asthma. Further investigations are needed to improve our understanding of the role of the microbiome in inflammation and its influence on important risk factors for asthma, including tobacco smoke and host genetic features.
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