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Saarenpää M, Roslund MI, Nurminen N, Puhakka R, Kummola L, Laitinen OH, Hyöty H, Sinkkonen A. Urban indoor gardening enhances immune regulation and diversifies skin microbiota - A placebo-controlled double-blinded intervention study. Environ Int 2024; 187:108705. [PMID: 38688234 DOI: 10.1016/j.envint.2024.108705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/26/2024] [Accepted: 04/25/2024] [Indexed: 05/02/2024]
Abstract
According to the hygiene and biodiversity hypotheses, frequent exposure to environmental microbiota, especially through soil contact, diversifies commensal microbiota, enhances immune modulation, and ultimately lowers the risk of immune-mediated diseases. Here we test the underlying assumption of the hygiene and biodiversity hypotheses by instructing volunteers to grow edible plants indoors during the winter season when natural exposure to environmental microbiota is low. The one-month randomized, placebo-controlled double-blind trial consisted of two treatments: participants received either microbially diverse growing medium or visually similar but microbially poor growing medium. Skin microbiota and a panel of seven immune markers were analyzed in the beginning of the trial and after one month. The diversity of five bacterial phyla (Bacteroidetes, Planctomycetes, Proteobacteria, Cyanobacteria, and Verrucomicrobia) and one class (Bacteroidia) increased on the skin of participants in the intervention group while no changes were observed in the placebo group. The number of nodes and edges in the co-occurrence networks of the skin bacteria increased on average three times more in the intervention group than in the placebo group. The plasma levels of the immunomodulatory cytokine interleukin 10 (IL-10) increased in the intervention group when compared with the placebo group. A similar trend was observed in the interleukin 17A (IL-17A) levels and in the IL-10:IL-17A ratios. Participants in both groups reported high satisfaction and adherence to the trial. The current study provides evidence in support of the core assumption of the hygiene and biodiversity hypotheses of immune-mediated diseases. Indoor urban gardening offers a meaningful and convenient approach for increasing year-round exposure to environmental microbiota, paving the way for other prophylactic practices that might help prevent immune-mediated diseases.
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Affiliation(s)
- Mika Saarenpää
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland; Natural Resources Institute Finland, Turku and Helsinki, Finland.
| | - Marja I Roslund
- Natural Resources Institute Finland, Turku and Helsinki, Finland.
| | - Noora Nurminen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön Katu 34, 33520 Tampere, Finland.
| | - Riikka Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland.
| | - Laura Kummola
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön Katu 34, 33520 Tampere, Finland.
| | - Olli H Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön Katu 34, 33520 Tampere, Finland.
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön Katu 34, 33520 Tampere, Finland.
| | - Aki Sinkkonen
- Natural Resources Institute Finland, Turku and Helsinki, Finland.
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Kummola L, González-Rodríguez MI, Marnila P, Nurminen N, Salomaa T, Hiihtola L, Mäkelä I, Laitinen OH, Hyöty H, Sinkkonen A, Junttila IS. Comparison of the effect of autoclaved and non-autoclaved live soil exposure on the mouse immune system : Effect of soil exposure on immune system. BMC Immunol 2023; 24:29. [PMID: 37689649 PMCID: PMC10492337 DOI: 10.1186/s12865-023-00565-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 08/29/2023] [Indexed: 09/11/2023] Open
Abstract
BACKGROUND . Lack of exposure to the natural microbial diversity of the environment has been linked to dysregulation of the immune system and numerous noncommunicable diseases, such as allergies and autoimmune disorders. Our previous studies suggest that contact with soil material, rich in naturally occurring microbes, could have a beneficial immunoregulatory impact on the immune system in mice and humans. However, differences in the immunomodulatory properties of autoclaved, sterile soil material and non-autoclaved, live soil material have not been compared earlier. RESULTS . In this study, we exposed C57BL/6 mice to autoclaved and live soil powders that had the same rich microbiota before autoclaving. We studied the effect of the soil powders on the mouse immune system by analyzing different immune cell populations, gene expression in the gut, mesenteric lymph nodes and lung, and serum cytokines. Both autoclaved and live soil exposure were associated with changes in the immune system. The exposure to autoclaved soil resulted in higher levels of Rorγt, Inos and Foxp3 expression in the colon. The exposure to live soil was associated with elevated IFN-γ concentration in the serum. In the mesenteric lymph node, exposure to live soil reduced Gata3 and Foxp3 expression, increased the percentage of CD8 + T cells and the expression of activation marker CD80 in XCR1+SIRPα- migratory conventional dendritic cell 1 subset. CONCLUSIONS . Our results indicate that exposure to the live and autoclaved soil powders is not toxic for mice. Exposure to live soil powder slightly skews the immune system towards type 1 direction which might be beneficial for inhibiting type 2-related inflammation. Further studies are warranted to quantify the impact of this exposure in experimental type 2 inflammation.
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Affiliation(s)
- Laura Kummola
- Faculty of Medicine and Health Technology, Tampere University, Tampere, 33014, Finland
| | | | - Pertti Marnila
- Natural Resources Institute Finland (Luke), Jokioinen, Finland
| | - Noora Nurminen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, 33014, Finland
| | - Tanja Salomaa
- Faculty of Medicine and Health Technology, Tampere University, Tampere, 33014, Finland
- Fimlab Laboratories, Arvo-Building, Rm F326, Arvo Ylpön katu 34, Tampere, 33520, Finland
| | - Lotta Hiihtola
- Faculty of Medicine and Health Technology, Tampere University, Tampere, 33014, Finland
- Fimlab Laboratories, Arvo-Building, Rm F326, Arvo Ylpön katu 34, Tampere, 33520, Finland
| | - Iida Mäkelä
- Natural Resources Institute Finland (Luke), Jokioinen, Finland
| | - Olli H Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, 33014, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, Tampere, 33014, Finland
| | - Aki Sinkkonen
- Natural Resources Institute Finland (Luke), Jokioinen, Finland
| | - Ilkka S Junttila
- Faculty of Medicine and Health Technology, Tampere University, Tampere, 33014, Finland.
- Fimlab Laboratories, Arvo-Building, Rm F326, Arvo Ylpön katu 34, Tampere, 33520, Finland.
- Northern Finland Laboratory Centre (NordLab), Oulu, 90220, Finland.
- Research Unit of Biomedicine, University of Oulu, Oulu, 90570, Finland.
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Wicaksono WA, Buko A, Kusstatscher P, Cernava T, Sinkkonen A, Laitinen OH, Virtanen SM, Hyöty H, Berg G. Impact of Cultivation and Origin on the Fruit Microbiome of Apples and Blueberries and Implications for the Exposome. Microb Ecol 2022:10.1007/s00248-022-02157-8. [PMID: 36542126 DOI: 10.1007/s00248-022-02157-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 12/07/2022] [Indexed: 06/17/2023]
Abstract
Vegetables and fruits are a crucial part of the planetary health diet, directly affecting human health and the gut microbiome. The objective of our study was to understand the variability of the fruit (apple and blueberry) microbiome in the frame of the exposome concept. The study covered two fruit-bearing woody species, apple and blueberry, two countries of origin (Austria and Finland), and two fruit production methods (naturally grown and horticultural). Microbial abundance, diversity, and community structures were significantly different for apples and blueberries and strongly influenced by the growing system (naturally grown or horticultural) and country of origin (Austria or Finland). Our results indicated that bacterial communities are more responsive towards these factors than fungal communities. We found that fruits grown in the wild and within home gardens generally carry a higher microbial diversity, while commercial horticulture homogenized the microbiome independent of the country of origin. This can be explained by horticultural management, including pesticide use and post-harvest treatments. Specific taxonomic indicators were identified for each group, i.e., for horticultural apples: Pseudomonas, Ralstonia, and Stenotrophomonas. Interestingly, Ralstonia was also found to be enriched in horticultural blueberries in comparison to such that were home and wildly grown. Our study showed that the origin of fruits can strongly influence the diversity and composition of their microbiome, which means that we are exposed to different microorganisms by eating fruits from different origins. Thus, the fruit microbiome needs to be considered an important but relatively unexplored external exposomic factor.
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Affiliation(s)
- Wisnu Adi Wicaksono
- Institute of Environmental Biotechnology, Graz University of Technology, Graz, Austria.
| | - Aisa Buko
- Institute of Environmental Biotechnology, Graz University of Technology, Graz, Austria
| | - Peter Kusstatscher
- Institute of Environmental Biotechnology, Graz University of Technology, Graz, Austria
| | - Tomislav Cernava
- Institute of Environmental Biotechnology, Graz University of Technology, Graz, Austria
| | - Aki Sinkkonen
- Natural Resources Institute Finland Luke, Turku, Finland
| | - Olli H Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Suvi M Virtanen
- Health and Well-Being Promotion Unit, Finnish Institute for Health and Welfare, Helsinki, Finland
- Faculty of Social Sciences, Unit of Health Sciences, Tampere University, Tampere, Finland
- Research, Development and Innovation Center, Tampere University Hospital, Tampere, Finland
- Center for Child Health Research, Tampere University and Tampere University Hospital, Tampere, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Gabriele Berg
- Institute of Environmental Biotechnology, Graz University of Technology, Graz, Austria.
- Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Potsdam, Germany.
- Institute for Biochemistry and Biology, University of Potsdam, Potsdam, Germany.
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Roslund MI, Parajuli A, Hui N, Puhakka R, Grönroos M, Soininen L, Nurminen N, Oikarinen S, Cinek O, Kramná L, Schroderus AM, Laitinen OH, Kinnunen T, Hyöty H, Sinkkonen A. A Placebo-controlled double-blinded test of the biodiversity hypothesis of immune-mediated diseases: Environmental microbial diversity elicits changes in cytokines and increase in T regulatory cells in young children. Ecotoxicol Environ Saf 2022; 242:113900. [PMID: 35930838 DOI: 10.1016/j.ecoenv.2022.113900] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 07/15/2022] [Accepted: 07/17/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND According to the biodiversity hypothesis of immune-mediated diseases, lack of microbiological diversity in the everyday living environment is a core reason for dysregulation of immune tolerance and - eventually - the epidemic of immune-mediated diseases in western urban populations. Despite years of intense research, the hypothesis was never tested in a double-blinded and placebo-controlled intervention trial. OBJECTIVE We aimed to perform the first placebo-controlled double-blinded test that investigates the effect of biodiversity on immune tolerance. METHODS In the intervention group, children aged 3-5 years were exposed to playground sand enriched with microbially diverse soil, or in the placebo group, visually similar, but microbially poor sand colored with peat (13 participants per treatment group). Children played twice a day for 20 min in the sandbox for 14 days. Sand, skin and gut bacterial, and blood samples were taken at baseline and after 14 days. Bacterial changes were followed for 28 days. Sand, skin and gut metagenome was determined by high throughput sequencing of bacterial 16 S rRNA gene. Cytokines were measured from plasma and the frequency of blood regulatory T cells was defined as a percentage of total CD3 +CD4 + T cells. RESULTS Bacterial richness (P < 0.001) and diversity (P < 0.05) were higher in the intervention than placebo sand. Skin bacterial community, including Gammaproteobacteria, shifted only in the intervention treatment to resemble the bacterial community in the enriched sand (P < 0.01). Mean change in plasma interleukin-10 (IL-10) concentration and IL-10 to IL-17A ratio supported immunoregulation in the intervention treatment compared to the placebo treatment (P = 0.02). IL-10 levels (P = 0.001) and IL-10 to IL-17A ratio (P = 0.02) were associated with Gammaproteobacterial community on the skin. The change in Treg frequencies was associated with the relative abundance of skin Thermoactinomycetaceae 1 (P = 0.002) and unclassified Alphaproteobacteria (P < 0.001). After 28 days, skin bacterial community still differed in the intervention treatment compared to baseline (P < 0.02). CONCLUSIONS This is the first double-blinded placebo-controlled study to show that daily exposure to microbial biodiversity is associated with immune modulation in humans. The findings support the biodiversity hypothesis of immune-mediated diseases. We conclude that environmental microbiota may contribute to child health, and that adding microbiological diversity to everyday living environment may support immunoregulation.
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Affiliation(s)
- Marja I Roslund
- Natural Resources Institute Finland (Luke), Helsinki and Turku, Finland; Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Anirudra Parajuli
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Nan Hui
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Riikka Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Mira Grönroos
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Laura Soininen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Noora Nurminen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Sami Oikarinen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Ondřej Cinek
- Department of Pediatrics, 2nd Faculty of Medicine, Charles University, V Úvalu 84, Praha 5, 150 06 Prague, Czech Republic
| | - Lenka Kramná
- Department of Pediatrics, 2nd Faculty of Medicine, Charles University, V Úvalu 84, Praha 5, 150 06 Prague, Czech Republic
| | - Anna-Mari Schroderus
- Department of Clinical Microbiology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Olli H Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Tuure Kinnunen
- Department of Clinical Microbiology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland; Eastern Finland Laboratory Centre (ISLAB), Kuopio, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland; Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Aki Sinkkonen
- Natural Resources Institute Finland (Luke), Helsinki and Turku, Finland.
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Wicaksono WA, Buko A, Kusstatscher P, Sinkkonen A, Laitinen OH, Virtanen SM, Hyöty H, Cernava T, Berg G. Modulation of the food microbiome by apple fruit processing. Food Microbiol 2022; 108:104103. [DOI: 10.1016/j.fm.2022.104103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 07/27/2022] [Accepted: 07/28/2022] [Indexed: 11/04/2022]
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Soininen L, Roslund MI, Nurminen N, Puhakka R, Laitinen OH, Hyöty H, Sinkkonen A. Indoor green wall affects health-associated commensal skin microbiota and enhances immune regulation: a randomized trial among urban office workers. Sci Rep 2022; 12:6518. [PMID: 35444249 PMCID: PMC9021224 DOI: 10.1038/s41598-022-10432-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 03/29/2022] [Indexed: 02/07/2023] Open
Abstract
Urbanization reduces microbiological abundance and diversity, which has been associated with immune mediated diseases. Urban greening may be used as a prophylactic method to restore microbiological diversity in cities and among urbanites. This study evaluated the impact of air-circulating green walls on bacterial abundance and diversity on human skin, and on immune responses determined by blood cytokine measurements. Human subjects working in offices in two Finnish cities (Lahti and Tampere) participated in a two-week intervention, where green walls were installed in the rooms of the experimental group. Control group worked without green walls. Skin and blood samples were collected before (Day0), during (Day14) and two weeks after (Day28) the intervention. The relative abundance of genus Lactobacillus and the Shannon diversity of phylum Proteobacteria and class Gammaproteobacteria increased in the experimental group. Proteobacterial diversity was connected to the lower proinflammatory cytokine IL-17A level among participants in Lahti. In addition, the change in TGF-β1 levels was opposite between the experimental and control group. As skin Lactobacillus and the diversity of Proteobacteria and Gammaproteobacteria are considered advantageous for skin health, air-circulating green walls may induce beneficial changes in a human microbiome. The immunomodulatory potential of air-circulating green walls deserves further research attention.
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Affiliation(s)
- L Soininen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140, Lahti, Finland
| | - M I Roslund
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140, Lahti, Finland.,Natural Resources Institute Finland, Horticulture Technologies, Turku and Helsinki, Finland
| | - N Nurminen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, 33520, Tampere, Finland
| | - R Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140, Lahti, Finland
| | - O H Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, 33520, Tampere, Finland
| | - H Hyöty
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, 33520, Tampere, Finland
| | - A Sinkkonen
- Natural Resources Institute Finland, Horticulture Technologies, Turku and Helsinki, Finland.
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González‐Rodríguez MI, Nurminen N, Kummola L, Laitinen OH, Oikarinen S, Parajuli A, Salomaa T, Mäkelä I, Roslund MI, Sinkkonen A, Hyöty H, Junttila IS. Effect of inactivated nature‐derived microbial composition on mouse immune system. Immun Inflamm Dis 2022; 10:e579. [PMID: 34873877 PMCID: PMC8926502 DOI: 10.1002/iid3.579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/04/2021] [Accepted: 11/22/2021] [Indexed: 11/16/2022] Open
Abstract
Introduction The hygiene hypothesis suggests that decrease in early life infections due to increased societal‐level hygiene standards subjects one to allergic and autoimmune diseases. In this report, we have studied the effect of sterilized forest soil and plant‐based material on mouse immune system and gut microbiome. Methods Inbred C57Bl/6 mice maintained in normal sterile environment were subjected to autoclaved forest soil‐derived powder in their bedding for 1 h a day for 3 weeks. Immune response was measured by immune cell flow cytometry, serum cytokine enzyme‐linked immunoassay (ELISA) and quantitative polymerase chain reaction (qPCR) analysis. Furthermore, the mouse gut microbiome was analyzed by sequencing. Results When compared to control mice, mice treated with soil‐derived powder had decreased level of pro‐inflammatory cytokines namely interleukin (IL)−17F and IL‐21 in the serum. Furthermore, splenocytes from mice treated with soil‐derived powder expressed less IL‐1b, IL‐5, IL‐6, IL‐13, and tumor necrosis factor (TNF) upon cell activation. Gut microbiome appeared to be stabilized by the treatment. Conclusions These results provide insights on the effect of biodiversity on murine immune system in sterile environment. Subjecting mice to soil‐based plant and microbe structures appears to elicit immune response that could be beneficial, for example, in type 2 inflammation‐related diseases, that is, allergic diseases.
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Affiliation(s)
| | - Noora Nurminen
- Faculty of Medicine and Health Technology Tampere University Tampere Finland
| | - Laura Kummola
- Faculty of Medicine and Health Technology Tampere University Tampere Finland
- Department of Clinical Microbiology Fimlab Laboratories Finland
| | - Olli H. Laitinen
- Faculty of Medicine and Health Technology Tampere University Tampere Finland
| | - Sami Oikarinen
- Faculty of Medicine and Health Technology Tampere University Tampere Finland
| | - Anirudra Parajuli
- Department of Medicine, Karolinska Institutet Center for infectious medicine (CIM) Huddinge Sweden
| | - Tanja Salomaa
- Faculty of Medicine and Health Technology Tampere University Tampere Finland
| | - Iida Mäkelä
- Department of Garden Technologies, Horticulture Technologies Natural Resources Institute Finland Finland
| | - Marja I. Roslund
- Ecosystems and Environment Research Programme University of Helsinki Helsinki Finland
| | - Aki Sinkkonen
- Department of Garden Technologies, Horticulture Technologies Natural Resources Institute Finland Finland
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology Tampere University Tampere Finland
- Department of Clinical Microbiology Fimlab Laboratories Finland
| | - Ilkka S. Junttila
- Faculty of Medicine and Health Technology Tampere University Tampere Finland
- Department of Clinical Microbiology Fimlab Laboratories Finland
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Roslund MI, Puhakka R, Nurminen N, Oikarinen S, Siter N, Grönroos M, Cinek O, Kramná L, Jumpponen A, Laitinen OH, Rajaniemi J, Hyöty H, Sinkkonen A. Long-term biodiversity intervention shapes health-associated commensal microbiota among urban day-care children. Environ Int 2021; 157:106811. [PMID: 34403882 DOI: 10.1016/j.envint.2021.106811] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/17/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND In modern urban environments children have a high incidence of inflammatory disorders, including allergies, asthma, and type1 diabetes. The underlying cause of these disorders, according to the biodiversity hypothesis, is an imbalance in immune regulation caused by a weak interaction with environmental microbes. In this 2-year study, we analyzed bacterial community shifts in the soil surface in day-care centers and commensal bacteria inhabiting the mouth, skin, and gut of children. We compared two different day-care environments: standard urban day-care centers and intervention day-care centers. Yards in the latter were amended with biodiverse forest floor vegetation and sod at the beginning of the study. RESULTS Intervention caused a long-standing increase in the relative abundance of nonpathogenic environmental mycobacteria in the surface soils. Treatment-specific shifts became evident in the community composition of Gammaproteobacteria, Negativicutes, and Bacilli, which jointly accounted for almost 40 and 50% of the taxa on the intervention day-care children's skin and in saliva, respectively. In the year-one skin swabs, richness of Alpha-, Beta-, and Gammaproteobacteria was higher, and the relative abundance of potentially pathogenic bacteria, including Haemophilus parainfluenzae, Streptococcus sp., and Veillonella sp., was lower among children in intervention day-care centers compared with children in standard day-care centers. In the gut, the relative abundance of Clostridium sensu stricto decreased, particularly among the intervention children. CONCLUSIONS This study shows that a 2-year biodiversity intervention shapes human commensal microbiota, including taxa that have been associated with immune regulation. Results indicate that intervention enriched commensal microbiota and suppressed the potentially pathogenic bacteria on the skin. We recommend future studies that expand intervention strategies to immune response and eventually the incidence of immune-mediated diseases.
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Affiliation(s)
- Marja I Roslund
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Riikka Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Noora Nurminen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Sami Oikarinen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Nathan Siter
- Faculty of Built Environment, Tampere University, Korkeakoulunkatu 5, FI-33720 Tampere, Finland
| | - Mira Grönroos
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Ondřej Cinek
- Department of Pediatrics, Second Faculty of Medicine, Charles University, V Úvalu 84, Praha 5, 150 06 Prague, Czech Republic
| | - Lenka Kramná
- Department of Pediatrics, Second Faculty of Medicine, Charles University, V Úvalu 84, Praha 5, 150 06 Prague, Czech Republic
| | - Ari Jumpponen
- Division of Biology, Kansas State University, Manhattan KS66506, KS, United States of America
| | - Olli H Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Juho Rajaniemi
- Faculty of Built Environment, Tampere University, Korkeakoulunkatu 5, FI-33720 Tampere, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Aki Sinkkonen
- Natural Resources Institute Finland, Turku, Finland.
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9
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Palmu T, Lehtonen J, Korhonen L, Virtanen SM, Niemelä O, Toppari J, Ilonen J, Veijola R, Knip M, Laitinen OH, Lönnrot M, Hyöty H. Association of different enteroviruses with atopy and allergic diseases in early childhood. Pediatr Allergy Immunol 2021; 32:1629-1636. [PMID: 34219290 DOI: 10.1111/pai.13577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/24/2021] [Accepted: 05/31/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Enterovirus (EV) infections, being among the most prevalent viruses worldwide, have been associated with reduced risk of allergic diseases. We sought to determine the association between EVs and allergic sensitization and disease in early childhood. METHODS The study was carried out in a nested case-control setting within a prospective birth cohort in Finland. We included 138 case children who had specific IgE (s-IgE) sensitization at the age of 5 years and 138 control children without s-IgE sensitization. Allergic disease was recorded at study visits and identified with the ISAAC questionnaire. We screened for the presence of serotype-specific antibodies against 41 EVs at 1-5 years of age and assessed their association with allergic sensitization and disease. RESULTS The overall number of EV infections did not differ between s-IgE-sensitized children and non-sensitized control children. However, there was a tendency of case children with an allergic disease having less EV infections than their controls. This observation was statistically significant for species A EVs in case children with atopic dermatitis vs. control children: OR 0.6 (95% CI 0.36-0.99), p = .048. CONCLUSION This study supports the evidence that EV exposure and development of allergic disease are inversely associated. Interestingly, the inverse association was not observed for bare atopic IgE sensitization, but for IgE sensitization coupled with clinical atopic disease. This suggests that environmental factors influencing IgE sensitization may differ from those influencing progression to clinical allergic disease.
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Affiliation(s)
- Tiina Palmu
- Department of Virology, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.,Department of Dermatology and Allergology, The Hospital District of South Ostrobothnia, Seinäjoki, Finland
| | - Jussi Lehtonen
- Department of Virology, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Laura Korhonen
- Department of Virology, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.,Department of Dermatology, Tampere University Hospital, Tampere, Finland
| | - Suvi M Virtanen
- Health and Well-Being Promotion Unit, Finnish Institute for Health and Welfare, Helsinki, Finland.,Unit of Health Sciences, Faculty of Social Sciences, Tampere University, Tampere, Finland.,Tampere University Hospital, Research, Development and Innovation Center, Tampere, Finland.,Center for Child Health Research, Tampere University and Tampere University Hospital, Tampere, Finland
| | - Onni Niemelä
- Department of Laboratory Medicine and Medical Research Unit, Seinäjoki Central Hospital and Tampere University, Seinäjoki/Tampere, Finland
| | - Jorma Toppari
- Institute of Biomedicine, Centre for Integrative Physiology and Pharmacology, and Centre for Population Health Research, University of Turku, Turku, Finland.,Department of Pediatrics, Turku University Hospital, Turku, Finland
| | - Jorma Ilonen
- Immunogenetics Laboratory, Institute of Biomedicine, University of Turku, Turku, Finland
| | - Riitta Veijola
- Department of Pediatrics, University of Oulu and Oulu University Hospital, Oulu, Finland
| | - Mikael Knip
- Pediatric Research Center, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Department of Pediatrics, Tampere University Hospital, Tampere, Finland
| | - Olli H Laitinen
- Department of Virology, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Maria Lönnrot
- Department of Virology, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.,Department of Dermatology, Tampere University Hospital, Tampere, Finland
| | - Heikki Hyöty
- Department of Virology, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.,Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
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10
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Nurminen N, Cerrone D, Lehtonen J, Parajuli A, Roslund M, Lönnrot M, Ilonen J, Toppari J, Veijola R, Knip M, Rajaniemi J, Laitinen OH, Sinkkonen A, Hyöty H. Land Cover of Early-Life Environment Modulates the Risk of Type 1 Diabetes. Diabetes Care 2021; 44:1506-1514. [PMID: 33952607 PMCID: PMC8323192 DOI: 10.2337/dc20-1719] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 03/27/2021] [Indexed: 02/03/2023]
Abstract
OBJECTIVE Environmental microbial exposures have been implicated to protect against immune-mediated diseases such as type 1 diabetes. Our objective was to study the association of land cover around the early-life dwelling with the development of islet autoimmunity and type 1 diabetes to evaluate the role of environmental microbial biodiversity in the pathogenesis. RESEARCH DESIGN AND METHODS Association between land cover types and the future risk of type 1 diabetes was studied by analyzing land cover types classified according to Coordination of Information on the Environment (CORINE) 2012 and 2000 data around the dwelling during the first year of life for 10,681 children genotyped for disease-associated HLA-DQ alleles and monitored from birth in the Type 1 Diabetes Prediction and Prevention (DIPP) study. Land cover was compared between children who developed type 1 diabetes (n = 271) or multiple diabetes-associated islet autoantibodies (n = 384) and children without diabetes who are negative for diabetes autoantibodies. RESULTS Agricultural land cover around the home was inversely associated with diabetes risk (odds ratio 0.37, 95% CI 0.16-0.87, P = 0.02 within a distance of 1,500 m). The association was observed among children with the high-risk HLA genotype and among those living in the southernmost study region. Snow cover on the ground seemed to block the transfer of the microbial community indoors, leading to reduced bacterial richness and diversity indoors, which might explain the regional difference in the association. In survival models, an agricultural environment was associated with a decreased risk of multiple islet autoantibodies (hazard ratio [HR] 1.60, P = 0.008) and a decreased risk of progression from single to multiple autoantibody positivity (HR 2.07, P = 0.001) compared with an urban environment known to have lower environmental microbial diversity. CONCLUSIONS The study suggests that exposure to an agricultural environment (comprising nonirrigated arable land, fruit trees and berry plantations, pastures, natural pastures, land principally occupied by agriculture with significant areas of natural vegetation, and agroforestry areas) early in life is inversely associated with the risk of type 1 diabetes. This association may be mediated by early exposure to environmental microbial diversity.
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Affiliation(s)
- Noora Nurminen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Damiano Cerrone
- Faculty of Built Environment, Tampere University, Tampere, Finland
| | - Jussi Lehtonen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Anirudra Parajuli
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Marja Roslund
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Maria Lönnrot
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.,Department of Dermatology, Tampere University Hospital, Tampere, Finland
| | - Jorma Ilonen
- Institute of Biomedicine, University of Turku, Turku, Finland.,Clinical Microbiology, Turku University Hospital, Turku, Finland
| | - Jorma Toppari
- Institute of Biomedicine, Centre for Integrative Physiology and Pharmacology, University of Turku, Turku, Finland.,Department of Pediatrics, Turku University Hospital, Turku, Finland
| | - Riitta Veijola
- Department of Pediatrics, University of Oulu and Oulu University Hospital, Oulu, Finland
| | - Mikael Knip
- Pediatric Research Center, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Folkhälsan Research Center, Helsinki, Finland.,Department of Pediatrics, Tampere University Hospital, Tampere, Finland
| | - Juho Rajaniemi
- Faculty of Built Environment, Tampere University, Tampere, Finland
| | - Olli H Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Aki Sinkkonen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland.,Natural Resources Institute Finland Luke, Turku, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland .,Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
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11
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Laitinen OH, Kuusela TP, Kukkurainen S, Nurminen A, Sinkkonen A, Hytönen VP. Bacterial avidins are a widely distributed protein family in Actinobacteria, Proteobacteria and Bacteroidetes. BMC Ecol Evol 2021; 21:53. [PMID: 33836663 PMCID: PMC8033661 DOI: 10.1186/s12862-021-01784-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 03/30/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Avidins are biotin-binding proteins commonly found in the vertebrate eggs. In addition to streptavidin from Streptomyces avidinii, a growing number of avidins have been characterized from divergent bacterial species. However, a systematic research concerning their taxonomy and ecological role has never been done. We performed a search for avidin encoding genes among bacteria using available databases and classified potential avidins according to taxonomy and the ecological niches utilized by host bacteria. RESULTS Numerous avidin-encoding genes were found in the phyla Actinobacteria and Proteobacteria. The diversity of protein sequences was high and several new variants of genes encoding biotin-binding avidins were found. The living strategies of bacteria hosting avidin encoding genes fall mainly into two categories. Human and animal pathogens were overrepresented among the found bacteria carrying avidin genes. The other widespread category were bacteria that either fix nitrogen or live in root nodules/rhizospheres of plants hosting nitrogen-fixing bacteria. CONCLUSIONS Bacterial avidins are a taxonomically and ecologically diverse group mainly found in Actinobacteria, Proteobacteria and Bacteroidetes, associated often with plant invasiveness. Avidin encoding genes in plasmids hint that avidins may be horizontally transferred. The current survey may be used as a basis in attempts to understand the ecological significance of biotin-binding capacity.
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Affiliation(s)
- Olli H Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Tanja P Kuusela
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Sampo Kukkurainen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Anssi Nurminen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Aki Sinkkonen
- Horticulture Technologies, Natural Resources Institute Finland, Turku, Finland
| | - Vesa P Hytönen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland. .,Fimlab Laboratories, Tampere, Finland.
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12
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Saarenpää M, Roslund MI, Puhakka R, Grönroos M, Parajuli A, Hui N, Nurminen N, Laitinen OH, Hyöty H, Cinek O, Sinkkonen A. Do Rural Second Homes Shape Commensal Microbiota of Urban Dwellers? A Pilot Study among Urban Elderly in Finland. Int J Environ Res Public Health 2021; 18:ijerph18073742. [PMID: 33918486 PMCID: PMC8038225 DOI: 10.3390/ijerph18073742] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 03/29/2021] [Accepted: 03/31/2021] [Indexed: 12/16/2022]
Abstract
According to the hygiene and biodiversity hypotheses, increased hygiene levels and reduced contact with biodiversity can partially explain the high prevalence of immune-mediated diseases in developed countries. A disturbed commensal microbiota, especially in the gut, has been linked to multiple immune-mediated diseases. Previous studies imply that gut microbiota composition is associated with the everyday living environment and can be modified by increasing direct physical exposure to biodiverse materials. In this pilot study, the effects of rural-second-home tourism were investigated on the gut microbiota for the first time. Rural-second-home tourism, a popular form of outdoor recreation in Northern Europe, North America, and Russia, has the potential to alter the human microbiota by increasing exposure to nature and environmental microbes. The hypotheses were that the use of rural second homes is associated with differences in the gut microbiota and that the microbiota related to health benefits are more diverse or common among the rural-second-home users. Based on 16S rRNA Illumina MiSeq sequencing of stool samples from 10 urban elderly having access and 15 lacking access to a rural second home, the first hypothesis was supported: the use of rural second homes was found to be associated with lower gut microbiota diversity and RIG-I-like receptor signaling pathway levels. The second hypothesis was not supported: health-related microbiota were not more diverse or common among the second-home users. The current study encourages further research on the possible health outcomes or causes of the observed microbiological differences. Activities and diet during second-home visits, standard of equipment, surrounding environment, and length of the visits are all postulated to play a role in determining the effects of rural-second-home tourism on the gut microbiota.
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Affiliation(s)
- Mika Saarenpää
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland; (M.S.); (M.I.R.); (R.P.); (M.G.); (A.P.); (N.H.)
| | - Marja I. Roslund
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland; (M.S.); (M.I.R.); (R.P.); (M.G.); (A.P.); (N.H.)
| | - Riikka Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland; (M.S.); (M.I.R.); (R.P.); (M.G.); (A.P.); (N.H.)
| | - Mira Grönroos
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland; (M.S.); (M.I.R.); (R.P.); (M.G.); (A.P.); (N.H.)
| | - Anirudra Parajuli
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland; (M.S.); (M.I.R.); (R.P.); (M.G.); (A.P.); (N.H.)
- Department of Medicine, Karolinska University Hospital, Huddinge, 141 86 Stockholm, Sweden
| | - Nan Hui
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland; (M.S.); (M.I.R.); (R.P.); (M.G.); (A.P.); (N.H.)
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan RD. Minhang District, Shanghai 200240, China
| | - Noora Nurminen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, 33520 Tampere, Finland; (N.N.); (O.H.L.); (H.H.)
| | - Olli H. Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, 33520 Tampere, Finland; (N.N.); (O.H.L.); (H.H.)
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, 33520 Tampere, Finland; (N.N.); (O.H.L.); (H.H.)
| | - Ondrej Cinek
- Second Faculty of Medicine, Charles University, V Úvalu 84, 150 06 Prague 5, Czech Republic;
| | - Aki Sinkkonen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland; (M.S.); (M.I.R.); (R.P.); (M.G.); (A.P.); (N.H.)
- Natural Resources Institute Finland, Itäinen Pitkäkatu 4 A, 20520 Turku, Finland
- Correspondence:
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13
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Vari HK, Roslund MI, Oikarinen S, Nurminen N, Puhakka R, Parajuli A, Grönroos M, Siter N, Laitinen OH, Hyöty H, Rajaniemi J, Rantalainen AL, Sinkkonen A. Associations between land cover categories, gaseous PAH levels in ambient air and endocrine signaling predicted from gut bacterial metagenome of the elderly. Chemosphere 2021; 265:128965. [PMID: 33248729 DOI: 10.1016/j.chemosphere.2020.128965] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/05/2020] [Accepted: 11/10/2020] [Indexed: 06/12/2023]
Abstract
There is evidence that polycyclic aromatic hydrocarbons (PAHs) and human gut microbiota are associated with the modulation of endocrine signaling pathways. Independently, studies have found associations between air pollution, land cover and commensal microbiota. We are the first to estimate the interaction between land cover categories associated with air pollution or purification, PAH levels and endocrine signaling predicted from gut metagenome among urban and rural populations. The study participants were elderly people (65-79 years); 30 lived in rural and 32 in urban areas. Semi-Permeable Membrane devices were utilized to measure air PAH concentrations as they simulate the process of bioconcentration in the fatty tissues. Land cover categories were estimated using CORINE database and geographic information system. Functional orthologues for peroxisome proliferator-activated receptor (PPAR) pathway in endocrine system were analyzed from gut bacterial metagenome with Kyoto Encyclopaedia of Genes and Genomes. High coverage of broad-leaved and mixed forests around the homes were associated with decreased PAH levels in ambient air, while gut functional orthologues for PPAR pathway increased along with these forest types. The difference between urban and rural PAH concentrations was not notable. However, some rural measurements were higher than the urban average, which was due to the use of heavy equipment on active farms. The provision of air purification by forests might be an important determining factor in the context of endocrine disruption potential of PAHs. Particularly broad-leaved forests around homes may reduce PAH levels in ambient air and balance pollution-induced disturbances within commensal gut microbiota.
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Affiliation(s)
- Heli K Vari
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, Lahti, Finland
| | - Marja I Roslund
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, Lahti, Finland
| | - Sami Oikarinen
- Tampere University, Faculty of Medicine and Health Technology, Arvo Ylpönkatu 34, Tampere, Finland
| | - Noora Nurminen
- Tampere University, Faculty of Medicine and Health Technology, Arvo Ylpönkatu 34, Tampere, Finland
| | - Riikka Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, Lahti, Finland
| | - Anirudra Parajuli
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, Lahti, Finland
| | - Mira Grönroos
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, Lahti, Finland
| | - Nathan Siter
- Tampere University, Faculty of Built Environment, Korkeakoulunkatu 5, Tampere, Finland
| | - Olli H Laitinen
- Tampere University, Faculty of Medicine and Health Technology, Arvo Ylpönkatu 34, Tampere, Finland
| | - Heikki Hyöty
- Tampere University, Faculty of Medicine and Health Technology, Arvo Ylpönkatu 34, Tampere, Finland
| | - Juho Rajaniemi
- Tampere University, Faculty of Built Environment, Korkeakoulunkatu 5, Tampere, Finland
| | - Anna-Lea Rantalainen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, Lahti, Finland
| | - Aki Sinkkonen
- Natural Resources Institute Finland, Horticulture Technologies, Itäinen Pitkäkatu 4, Turku, Finland.
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14
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Roslund MI, Puhakka R, Grönroos M, Nurminen N, Oikarinen S, Gazali AM, Cinek O, Kramná L, Siter N, Vari HK, Soininen L, Parajuli A, Rajaniemi J, Kinnunen T, Laitinen OH, Hyöty H, Sinkkonen A. Biodiversity intervention enhances immune regulation and health-associated commensal microbiota among daycare children. Sci Adv 2020; 6:eaba2578. [PMID: 33055153 PMCID: PMC7556828 DOI: 10.1126/sciadv.aba2578] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 08/14/2020] [Indexed: 05/02/2023]
Abstract
As the incidence of immune-mediated diseases has increased rapidly in developed societies, there is an unmet need for novel prophylactic practices to fight against these maladies. This study is the first human intervention trial in which urban environmental biodiversity was manipulated to examine its effects on the commensal microbiome and immunoregulation in children. We analyzed changes in the skin and gut microbiota and blood immune markers of children during a 28-day biodiversity intervention. Children in standard urban and nature-oriented daycare centers were analyzed for comparison. The intervention diversified both the environmental and skin Gammaproteobacterial communities, which, in turn, were associated with increases in plasma TGF-β1 levels and the proportion of regulatory T cells. The plasma IL-10:IL-17A ratio increased among intervention children during the trial. Our findings suggest that biodiversity intervention enhances immunoregulatory pathways and provide an incentive for future prophylactic approaches to reduce the risk of immune-mediated diseases in urban societies.
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Affiliation(s)
- Marja I Roslund
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Riikka Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Mira Grönroos
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Noora Nurminen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Sami Oikarinen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Ahmad M Gazali
- Department of Clinical Microbiology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Ondřej Cinek
- Department of Pediatrics, 2nd Faculty of Medicine, Charles University and University Hospital Motol, V Úvalu 84, Praha 5, 150 06 Prague, Czech Republic
| | - Lenka Kramná
- Department of Pediatrics, 2nd Faculty of Medicine, Charles University and University Hospital Motol, V Úvalu 84, Praha 5, 150 06 Prague, Czech Republic
| | - Nathan Siter
- Faculty of Built Environment, Tampere University, Korkeakoulunkatu 5, FI-33720 Tampere, Finland
| | - Heli K Vari
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Laura Soininen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Anirudra Parajuli
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland
| | - Juho Rajaniemi
- Faculty of Built Environment, Tampere University, Korkeakoulunkatu 5, FI-33720 Tampere, Finland
| | - Tuure Kinnunen
- Department of Clinical Microbiology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
- Eastern Finland Laboratory Centre (ISLAB), Kuopio, Finland
| | - Olli H Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland
| | - Aki Sinkkonen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland.
- Natural Resources Institute Finland Luke, Itäinen Pitkäkatu 4A, 20520 Turku, Finland
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15
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Saarinen NVV, Lehtonen J, Veijola R, Lempainen J, Knip M, Hyöty H, Laitinen OH, Hytönen VP. Correction: Saarinen, N.V.V., et al. Multiplexed High-Throughput Serological Assay for Human Enteroviruses. Microorganismis 2020, 8, 963. Microorganisms 2020; 8:microorganisms8091426. [PMID: 32957450 PMCID: PMC7563745 DOI: 10.3390/microorganisms8091426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 09/15/2020] [Indexed: 11/16/2022] Open
Abstract
The authors wish to make the following corrections to this paper [...].
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Affiliation(s)
- Niila V. V. Saarinen
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland; (N.V.V.S.); (J.L.); (H.H.); (O.H.L.)
| | - Jussi Lehtonen
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland; (N.V.V.S.); (J.L.); (H.H.); (O.H.L.)
| | - Riitta Veijola
- Department of Paediatrics, University of Oulu, 90570 Oulu, Finland;
| | - Johanna Lempainen
- Department of Paediatrics, University of Turku, 20520 Turku, Finland;
| | - Mikael Knip
- Pediatric Research Center, Children’s Hospital, University of Helsinki and Helsinki University Hospital, and Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, 00029 Helsinki, Finland;
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland; (N.V.V.S.); (J.L.); (H.H.); (O.H.L.)
- Fimlab Laboratories, 33520 Tampere, Finland
| | - Olli H. Laitinen
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland; (N.V.V.S.); (J.L.); (H.H.); (O.H.L.)
| | - Vesa P. Hytönen
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland; (N.V.V.S.); (J.L.); (H.H.); (O.H.L.)
- Fimlab Laboratories, 33520 Tampere, Finland
- Correspondence: ; Tel.: +358-401901517
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16
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Hankaniemi MM, Baikoghli MA, Stone VM, Xing L, Väätäinen O, Soppela S, Sioofy-Khojine A, Saarinen NVV, Ou T, Anson B, Hyöty H, Marjomäki V, Flodström-Tullberg M, Cheng RH, Hytönen VP, Laitinen OH. Structural Insight into CVB3-VLP Non-Adjuvanted Vaccine. Microorganisms 2020; 8:microorganisms8091287. [PMID: 32846899 PMCID: PMC7565060 DOI: 10.3390/microorganisms8091287] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 07/23/2020] [Accepted: 07/23/2020] [Indexed: 12/23/2022] Open
Abstract
Coxsackievirus B (CVB) enteroviruses are common pathogens that can cause acute and chronic myocarditis, dilated cardiomyopathy, aseptic meningitis, and they are hypothesized to be a causal factor in type 1 diabetes. The licensed enterovirus vaccines and those currently in clinical development are traditional inactivated or live attenuated vaccines. Even though these vaccines work well in the prevention of enterovirus diseases, new vaccine technologies, like virus-like particles (VLPs), can offer important advantages in the manufacturing and epitope engineering. We have previously produced VLPs for CVB3 and CVB1 in insect cells. Here, we describe the production of CVB3-VLPs with enhanced production yield and purity using an improved purification method consisting of tangential flow filtration and ion exchange chromatography, which is compatible with industrial scale production. We also resolved the CVB3-VLP structure by Cryo-Electron Microscopy imaging and single particle reconstruction. The VLP diameter is 30.9 nm on average, and it is similar to Coxsackievirus A VLPs and the expanded enterovirus cell-entry intermediate (the 135s particle), which is ~2 nm larger than the mature virion. High neutralizing and total IgG antibody levels, the latter being a predominantly Th2 type (IgG1) phenotype, were detected in C57BL/6J mice immunized with non-adjuvanted CVB3-VLP vaccine. The structural and immunogenic data presented here indicate the potential of this improved methodology to produce highly immunogenic enterovirus VLP-vaccines in the future.
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Affiliation(s)
- Minna M. Hankaniemi
- Faculty of Medicine and Life Sciences, Tampere University, FI-33014 Tampere, Finland; (O.V.); (S.S.); (A.S.-K.); (N.V.V.S.); (H.H.); (O.H.L.)
- Correspondence: (M.M.H.); (V.P.H.); Tel.: +358-504176882 (M.M.H.); +358-401901517 (V.P.H.)
| | - Mo A. Baikoghli
- Department of Molecular and Cellular Biology, University of California, Davis, CA 95616, USA; (M.A.B.); (L.X.); (T.O.); (B.A.); (R.H.C.)
- Institute for Molecular Medicine Finland (FIMM), HiLIFE, P.O. Box 20, University of Helsinki, 00014 Helsinki, Finland
| | - Virginia M. Stone
- The Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital Huddinge, SE-141 52 Stockholm, Sweden; (V.M.S.); (M.F.-T.)
| | - Li Xing
- Department of Molecular and Cellular Biology, University of California, Davis, CA 95616, USA; (M.A.B.); (L.X.); (T.O.); (B.A.); (R.H.C.)
| | - Outi Väätäinen
- Faculty of Medicine and Life Sciences, Tampere University, FI-33014 Tampere, Finland; (O.V.); (S.S.); (A.S.-K.); (N.V.V.S.); (H.H.); (O.H.L.)
| | - Saana Soppela
- Faculty of Medicine and Life Sciences, Tampere University, FI-33014 Tampere, Finland; (O.V.); (S.S.); (A.S.-K.); (N.V.V.S.); (H.H.); (O.H.L.)
| | - Amirbabak Sioofy-Khojine
- Faculty of Medicine and Life Sciences, Tampere University, FI-33014 Tampere, Finland; (O.V.); (S.S.); (A.S.-K.); (N.V.V.S.); (H.H.); (O.H.L.)
| | - Niila V. V. Saarinen
- Faculty of Medicine and Life Sciences, Tampere University, FI-33014 Tampere, Finland; (O.V.); (S.S.); (A.S.-K.); (N.V.V.S.); (H.H.); (O.H.L.)
| | - Tingwei Ou
- Department of Molecular and Cellular Biology, University of California, Davis, CA 95616, USA; (M.A.B.); (L.X.); (T.O.); (B.A.); (R.H.C.)
| | - Brandon Anson
- Department of Molecular and Cellular Biology, University of California, Davis, CA 95616, USA; (M.A.B.); (L.X.); (T.O.); (B.A.); (R.H.C.)
| | - Heikki Hyöty
- Faculty of Medicine and Life Sciences, Tampere University, FI-33014 Tampere, Finland; (O.V.); (S.S.); (A.S.-K.); (N.V.V.S.); (H.H.); (O.H.L.)
- Fimlab Laboratories, FI-33520 Tampere, Finland
| | - Varpu Marjomäki
- Department of Biological and Environmental Science/Nanoscience Center, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland;
| | - Malin Flodström-Tullberg
- The Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital Huddinge, SE-141 52 Stockholm, Sweden; (V.M.S.); (M.F.-T.)
| | - R. Holland Cheng
- Department of Molecular and Cellular Biology, University of California, Davis, CA 95616, USA; (M.A.B.); (L.X.); (T.O.); (B.A.); (R.H.C.)
| | - Vesa P. Hytönen
- Faculty of Medicine and Life Sciences, Tampere University, FI-33014 Tampere, Finland; (O.V.); (S.S.); (A.S.-K.); (N.V.V.S.); (H.H.); (O.H.L.)
- Fimlab Laboratories, FI-33520 Tampere, Finland
- Correspondence: (M.M.H.); (V.P.H.); Tel.: +358-504176882 (M.M.H.); +358-401901517 (V.P.H.)
| | - Olli H. Laitinen
- Faculty of Medicine and Life Sciences, Tampere University, FI-33014 Tampere, Finland; (O.V.); (S.S.); (A.S.-K.); (N.V.V.S.); (H.H.); (O.H.L.)
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17
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Abstract
Fast, robust, and affordable antimicrobial susceptibility testing (AST) is required, as roughly 50% of antibiotic treatments are started with wrong antibiotics and without a proper diagnosis of the pathogen. Validated growth-based AST according to EUCAST or CLSI (European Committee on Antimicrobial Susceptibility Testing, Clinical Laboratory Standards Institute) recommendations is currently suggested to guide the antimicrobial therapy. Any new AST should be validated against these standard methods. Many rapid diagnostic techniques can already provide pathogen identification. Some of them can additionally detect the presence of resistance genes or resistance proteins, but usually isolated pure cultures are needed for AST. We discuss the value of the technologies applying nucleic acid amplification, whole genome sequencing, and hybridization as well as immunodiagnostic and mass spectrometry-based methods and biosensor-based AST. Additionally, we evaluate the potential of integrated systems applying microfluidics to integrate cultivation, lysis, purification, and signal reading steps. We discuss technologies and commercial products with potential for Point-of-Care Testing (POCT) and their capability to analyze polymicrobial samples without pre-purification steps. The purpose of this critical review is to present the needs and drivers for AST development, to show the benefits and limitations of AST methods, to introduce promising new POCT-compatible technologies, and to discuss AST technologies that are likely to thrive in the future.
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Affiliation(s)
- Antti Vasala
- Protein Dynamics, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Vesa P. Hytönen
- Protein Dynamics, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Fimlab Laboratories, Tampere, Finland
| | - Olli H. Laitinen
- Protein Dynamics, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
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18
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Saarinen NVV, Lehtonen J, Veijola R, Lempainen J, Knip M, Hyöty H, Laitinen OH, Hytönen VP. Multiplexed High-Throughput Serological Assay for Human Enteroviruses. Microorganisms 2020; 8:microorganisms8060963. [PMID: 32604930 PMCID: PMC7355947 DOI: 10.3390/microorganisms8060963] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 12/22/2022] Open
Abstract
Immunological assays detecting antibodies against enteroviruses typically use a single enterovirus serotype as antigen. This limits the ability of such assays to detect antibodies against different enterovirus types and to detect possible type-specific variation in antibody responses. We set out to develop a multiplexed assay for simultaneous detection of antibodies against multiple enterovirus and rhinovirus types encompassing all human infecting species. Seven recombinant VP1 proteins from enteroviruses EV-A to EV-D and rhinoviruses RV-A to RV-C species were produced. Using Meso Scale Diagnostics U-PLEX platform we were able to study antibody reactions against these proteins as well as non-structural enterovirus proteins in a single well with 140 human serum samples. Adults had on average 33-fold stronger antibody responses to these antigens (p < 10−11) compared to children, but children had less cross-reactivity between different enterovirus types. The results suggest that this new high-throughput assay offers clear benefits in the evaluation of humoral enterovirus immunity in children, giving more exact information than assays that are based on a single enterovirus type as antigen.
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Affiliation(s)
- Niila V. V. Saarinen
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland; (N.V.V.S.); (J.L.); (H.H.); (O.H.L.)
| | - Jussi Lehtonen
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland; (N.V.V.S.); (J.L.); (H.H.); (O.H.L.)
| | - Riitta Veijola
- Department of Paediatrics, University of Oulu, 90570 Oulu, Finland;
| | - Johanna Lempainen
- Department of Paediatrics, University of Turku, 20520 Turku, Finland;
| | - Mikael Knip
- Pediatric Research Center, Children’s Hospital, University of Helsinki and Helsinki University Hospital, 00029 Helsinki, Finland;
- Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, 00029 Helsinki, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland; (N.V.V.S.); (J.L.); (H.H.); (O.H.L.)
- Fimlab Laboratories, 33520 Tampere, Finland
| | - Olli H. Laitinen
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland; (N.V.V.S.); (J.L.); (H.H.); (O.H.L.)
| | - Vesa P. Hytönen
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland; (N.V.V.S.); (J.L.); (H.H.); (O.H.L.)
- Fimlab Laboratories, 33520 Tampere, Finland
- Correspondence: ; Tel.: +358-401901517
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19
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Parajuli A, Hui N, Puhakka R, Oikarinen S, Grönroos M, Selonen VAO, Siter N, Kramna L, Roslund MI, Vari HK, Nurminen N, Honkanen H, Hintikka J, Sarkkinen H, Romantschuk M, Kauppi M, Valve R, Cinek O, Laitinen OH, Rajaniemi J, Hyöty H, Sinkkonen A. Yard vegetation is associated with gut microbiota composition. Sci Total Environ 2020; 713:136707. [PMID: 32019041 DOI: 10.1016/j.scitotenv.2020.136707] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 01/08/2020] [Accepted: 01/13/2020] [Indexed: 06/10/2023]
Abstract
Gut microbes play an essential role in the development and functioning of the human immune system. A disturbed gut microbiota composition is often associated with a number of health disorders including immune-mediated diseases. Differences in host characteristics such as ethnicity, living habit and diet have been used to explain differences in the gut microbiota composition in inter-continental comparison studies. As our previous studies imply that daily skin contact with organic gardening materials modify gut microflora, here we investigated the association between living environment and gut microbiota in a homogenous western population along an urban-rural gradient. We obtained stool samples from 48 native elderly Finns in province Häme in August and November 2015 and identified the bacterial phylotypes using 16S rRNA Illumina MiSeq sequencing. We assumed that yard vegetation and land cover classes surrounding homes explain the stool bacterial community in generalized linear mixed models. Diverse yard vegetation was associated with a reduced abundance of Clostridium sensu stricto and an increased abundance of Faecalibacterium and Prevotellaceae. The abundance of Bacteroides was positively and strongly associated with the built environment. Exclusion of animal owners did not alter the main associations. These results suggest that diverse vegetation around homes is associated with health-related changes in gut microbiota composition. Manipulation of the garden diversity, possibly jointly with urban planning, is a promising candidate for future intervention studies that aim to maintain gut homeostasis.
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Affiliation(s)
- Anirudra Parajuli
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Nan Hui
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland; School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Riikka Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Sami Oikarinen
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Mira Grönroos
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Ville A O Selonen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Nathan Siter
- School of Architecture, Tampere University of Technology, Tampere, Finland
| | - Lenka Kramna
- Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Marja I Roslund
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Heli K Vari
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Noora Nurminen
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Hanna Honkanen
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | | | | | - Martin Romantschuk
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | | | - Raisa Valve
- Division of Food and Nutrition Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
| | - Ondřej Cinek
- Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Olli H Laitinen
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Juho Rajaniemi
- School of Architecture, Tampere University of Technology, Tampere, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Aki Sinkkonen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland; Natural Resources Institute Finland, Turku, Finland.
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20
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Saarinen NVV, Stone VM, Hankaniemi MM, Mazur MA, Vuorinen T, Flodström-Tullberg M, Hyöty H, Hytönen VP, Laitinen OH. Antibody Responses against Enterovirus Proteases are Potential Markers for an Acute Infection. Viruses 2020; 12:E78. [PMID: 31936473 PMCID: PMC7020046 DOI: 10.3390/v12010078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/02/2020] [Accepted: 01/07/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Enteroviruses are a group of common non-enveloped RNA viruses that cause symptoms ranging from mild respiratory infections to paralysis. Due to the abundance of enterovirus infections it is hard to distinguish between on-going and previous infections using immunological assays unless the IgM fraction is studied. METHODS In this study we show using Indirect ELISA and capture IgM ELISA that an IgG antibody response against the nonstructural enteroviral proteins 2A and 3C can be used to distinguish between IgM positive (n = 22) and IgM negative (n = 20) human patients with 83% accuracy and a diagnostic odds ratio of 30. Using a mouse model, we establish that the antibody response to the proteases is short-lived compared to the antibody response to the structural proteins in. As such, the protease antibody response serves as a potential marker for an acute infection. CONCLUSIONS Antibody responses against enterovirus proteases are shorter-lived than against structural proteins and can differentiate between IgM positive and negative patients, and therefore they are a potential marker for acute infections.
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Affiliation(s)
- Niila V. V. Saarinen
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland; (N.V.V.S.); (V.M.S.); (M.M.H.); (M.F.-T.); (H.H.); (V.P.H.)
| | - Virginia M. Stone
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland; (N.V.V.S.); (V.M.S.); (M.M.H.); (M.F.-T.); (H.H.); (V.P.H.)
- Karolinska Institutet, The Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska University Hospital, 14152 Stockholm, Sweden;
| | - Minna M. Hankaniemi
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland; (N.V.V.S.); (V.M.S.); (M.M.H.); (M.F.-T.); (H.H.); (V.P.H.)
| | - Magdalena A. Mazur
- Karolinska Institutet, The Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska University Hospital, 14152 Stockholm, Sweden;
| | - Tytti Vuorinen
- Turku University Hospital, Clinical Microbiology and University of Turku, Institute of Biomedicine, 20520 Turku, Finland;
| | - Malin Flodström-Tullberg
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland; (N.V.V.S.); (V.M.S.); (M.M.H.); (M.F.-T.); (H.H.); (V.P.H.)
- Karolinska Institutet, The Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska University Hospital, 14152 Stockholm, Sweden;
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland; (N.V.V.S.); (V.M.S.); (M.M.H.); (M.F.-T.); (H.H.); (V.P.H.)
| | - Vesa P. Hytönen
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland; (N.V.V.S.); (V.M.S.); (M.M.H.); (M.F.-T.); (H.H.); (V.P.H.)
| | - Olli H. Laitinen
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland; (N.V.V.S.); (V.M.S.); (M.M.H.); (M.F.-T.); (H.H.); (V.P.H.)
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21
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Heinimäki S, Hankaniemi MM, Sioofy-Khojine AB, Laitinen OH, Hyöty H, Hytönen VP, Vesikari T, Blazevic V. Combination of three virus-derived nanoparticles as a vaccine against enteric pathogens; enterovirus, norovirus and rotavirus. Vaccine 2019; 37:7509-7518. [DOI: 10.1016/j.vaccine.2019.09.072] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 08/23/2019] [Accepted: 09/20/2019] [Indexed: 12/21/2022]
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22
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Hui N, Parajuli A, Puhakka R, Grönroos M, Roslund MI, Vari HK, Selonen VAO, Yan G, Siter N, Nurminen N, Oikarinen S, Laitinen OH, Rajaniemi J, Hyöty H, Sinkkonen A. Temporal variation in indoor transfer of dirt-associated environmental bacteria in agricultural and urban areas. Environ Int 2019; 132:105069. [PMID: 31400602 DOI: 10.1016/j.envint.2019.105069] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 07/28/2019] [Accepted: 07/29/2019] [Indexed: 05/04/2023]
Abstract
An agricultural environment and exposure to diverse environmental microbiota has been suggested to confer protection against immune-mediated disorders. As an agricultural environment may have a protective role, it is crucial to determine whether the limiting factors in the transfer of environmental microbiota indoors are the same in the agricultural and urban environments. We explored how sampling month, garden diversity and animal ownership affected the indoor-transfer of environmental microbial community. We collected litter from standardized doormats used for 2 weeks in June and August 2015 and February 2016 and identified bacterial phylotypes using 16S rRNA Illumina MiSeq sequencing. In February, the diversity and richness of the whole bacterial community and the relative abundance of environment-associated taxa were reduced, whereas human-associated taxa and genera containing opportunistic pathogens were enriched in the doormats. In summer, the relative abundances of several taxa associated previously with beneficial health effects were higher, particularly in agricultural areas. Surprisingly, the importance of vegetation on doormat microbiota was more observable in February, which may have resulted from snow cover that prevented contact with microbes in soil. Animal ownership increased the prevalence of genera Bacteroides and Acinetobacter in rural doormats. These findings underline the roles of season, living environment and lifestyle in the temporal variations in the environmental microbial community carried indoors. As reduced contact with diverse microbiota is a potential reason for immune system dysfunction, the results may have important implications in the etiology of immune-mediated, non-communicable diseases.
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Affiliation(s)
- Nan Hui
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Anirudra Parajuli
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland.
| | - Riikka Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Mira Grönroos
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Marja I Roslund
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Heli K Vari
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Ville A O Selonen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Guoyang Yan
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Nathan Siter
- Faculty of Built Environment, Tampere University, Tampere, Finland
| | - Noora Nurminen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Sami Oikarinen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Olli H Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Juho Rajaniemi
- Faculty of Built Environment, Tampere University, Tampere, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Aki Sinkkonen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland.
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23
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Roslund MI, Rantala S, Oikarinen S, Puhakka R, Hui N, Parajuli A, Laitinen OH, Hyöty H, Rantalainen AL, Sinkkonen A. Endocrine disruption and commensal bacteria alteration associated with gaseous and soil PAH contamination among daycare children. Environ Int 2019; 130:104894. [PMID: 31220749 DOI: 10.1016/j.envint.2019.06.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/31/2019] [Accepted: 06/02/2019] [Indexed: 05/04/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are priority environmental pollutants that cause adverse health effects. PAHs belong to endocrine signaling disruptors to which children are sensitive to. Recent evidence suggests that PAH pollution alters the abundance of environmental bacteria that is associated with health outcomes. The alteration of environmental and commensal microbiota by PAH pollution has never been connected to endocrine signaling pathways. To estimate the risk of endocrine disruption in daycare children, we measured PAHs from soil and air of eleven urban daycare centres in Finland. We analyzed daycare yards' soil and children's gut and skin bacterial communities with 16S rRNA gene metabarcoding and used Kyoto Encyclopaedia of Genes and Genomes database to categorize endocrine signaling pathways. We also assessed the PAH hazard to children's health based on the current risk assesments. We observed associations between signaling pathways in endocrine system and gaseous PAH levels in ambient air. Peroxisome proliferator-activated receptor and adipocytokine signaling pathway decreased with higher chrysene concentration in the air. Soil PAH contamination was associated with altered Actinobacteria, Bacteoridetes and Proteobacteria communities on children's skin and in daycare yard soil. However, adjusted genera were not the same in soil and on skin, with the exception of Mycobacterium that was associated with higher PAH concentrations both in soil and on the skin. Even though fluoranhtene levels were above the current threshold values, total PAHs were below safety threshold values and based on current risk assessments there is a minor risk for child health. Our findings indicate that PAH concentrations that are considered safe may interfere with endocrine signaling by commensal microbiota and alter both environmental and commensal bacterial communities. The imbalance in human microbiota and the decrease in signaling pathways may contribute to emerging public health problems, including inflammatory disorders, obesity and diabetes. Therefore, the optimal risk assessments of PAHs and theoretically also other contaminants shaping commensal microbiota may need to take into account the possibility of the disruption of endocrine signaling pathways.
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Affiliation(s)
- Marja I Roslund
- Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland.
| | - Sonja Rantala
- Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland
| | - Sami Oikarinen
- Faculty of Medicine and Life Technology, Tampere University, Tampere, Finland
| | - Riikka Puhakka
- Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland
| | - Nan Hui
- Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland
| | - Anirudra Parajuli
- Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland
| | - Olli H Laitinen
- Faculty of Medicine and Life Technology, Tampere University, Tampere, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Life Technology, Tampere University, Tampere, Finland
| | - Anna-Lea Rantalainen
- Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland
| | - Aki Sinkkonen
- Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland
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24
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Hui N, Grönroos M, Roslund MI, Parajuli A, Vari HK, Soininen L, Laitinen OH, Sinkkonen A. Diverse Environmental Microbiota as a Tool to Augment Biodiversity in Urban Landscaping Materials. Front Microbiol 2019; 10:536. [PMID: 30967847 PMCID: PMC6438878 DOI: 10.3389/fmicb.2019.00536] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 03/01/2019] [Indexed: 01/16/2023] Open
Abstract
Human activities typically lead to simplified urban diversity, which in turn reduces microbial exposure and increases the risk to urban dwellers from non-communicable diseases. To overcome this, we developed a microbial inoculant from forest and agricultural materials that resembles microbiota in organic soils. Three different sand materials (sieved, safety, and sandbox) commonly used in playgrounds and other public spaces were enriched with 5% of the inoculant. Skin microbiota on fingers (identified from bacterial 16S rDNA determined using Illumina MiSeq sequencing) was compared after touching non-enriched and microbial inoculant-enriched sands. Exposure to the non-enriched materials changed the skin bacterial community composition in distinct ways. When the inoculant was added to the materials, the overall shift in community composition was larger and the differences between different sand materials almost disappeared. Inoculant-enriched sand materials increased bacterial diversity and richness but did not affect evenness at the OTU level on skin. The Firmicutes/Bacteroidetes ratio was higher after touching inoculant-enriched compared to non-enriched sand materials. The relative abundance of opportunistic pathogens on skin was 40–50% before touching sand materials, but dropped to 14 and 4% after touching standard and inoculant-enriched sand materials, respectively. When individual genera were analyzed, Pseudomonas sp. and Sphingomonas sp. were more abundant after touching standard, non-enriched sand materials, while only the relative abundance of Chryseobacterium sp. increased after touching the inoculant-enriched materials. As Chryseobacterium is harmless for healthy persons, and as standard landscaping materials and normal skin contain genera that include severe pathogens, the inoculant-enriched materials can be considered safe. Microbial inoculants could be specifically created to increase the proportion of non-pathogenic bacterial taxa and minimize the transfer of pathogenic taxa. We recommend further study into the usability of inoculant-enriched materials and their effects on the bacterial community composition of human skin and on the immune response.
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Affiliation(s)
- Nan Hui
- Nature-Based Solutions Research Group, Ecology and Environment Research Programme, University of Helsinki, Lahti, Finland
| | - Mira Grönroos
- Nature-Based Solutions Research Group, Ecology and Environment Research Programme, University of Helsinki, Lahti, Finland
| | - Marja I Roslund
- Nature-Based Solutions Research Group, Ecology and Environment Research Programme, University of Helsinki, Lahti, Finland
| | - Anirudra Parajuli
- Nature-Based Solutions Research Group, Ecology and Environment Research Programme, University of Helsinki, Lahti, Finland
| | - Heli K Vari
- Nature-Based Solutions Research Group, Ecology and Environment Research Programme, University of Helsinki, Lahti, Finland
| | - Laura Soininen
- Nature-Based Solutions Research Group, Ecology and Environment Research Programme, University of Helsinki, Lahti, Finland
| | - Olli H Laitinen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Aki Sinkkonen
- Nature-Based Solutions Research Group, Ecology and Environment Research Programme, University of Helsinki, Lahti, Finland
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Roslund MI, Hyoty H, Rajaniemi J, Puhakka R, Gronroos M, Parajuli A, Siter N, Nurminen N, Lin J, Oikarinen S, Laitinen OH, Sinkkonen A. Health promoting materials to manage urban pollution and immune-mediated diseases. J Biotechnol 2018. [DOI: 10.1016/j.jbiotec.2018.06.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Grönroos M, Parajuli A, Laitinen OH, Roslund MI, Vari HK, Hyöty H, Puhakka R, Sinkkonen A. Short-term direct contact with soil and plant materials leads to an immediate increase in diversity of skin microbiota. Microbiologyopen 2018; 8:e00645. [PMID: 29808965 PMCID: PMC6436432 DOI: 10.1002/mbo3.645] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 03/23/2018] [Accepted: 03/27/2018] [Indexed: 12/14/2022] Open
Abstract
Immune‐mediated diseases have increased during the last decades in urban environments. The hygiene hypothesis suggests that increased hygiene level and reduced contacts with natural biodiversity are related to the increase in immune‐mediated diseases. We tested whether short‐time contact with microbiologically diverse nature‐based materials immediately change bacterial diversity on human skin. We tested direct skin contact, as two volunteers rubbed their hands with sixteen soil and plant based materials, and an exposure via fabric packets filled with moss material. Skin swabs were taken before and after both exposures. Next‐generation sequencing showed that exposures increased, at least temporarily, the total diversity of skin microbiota and the diversity of Acidobacteria, Actinobacteria, Bacteroidetes, Proteobacteria and Alpha‐, Beta‐ and Gammaproteobacteria suggesting that contact with nature‐based materials modify skin microbiome and increase skin microbial diversity. Until now, approaches to cure or prevent immune system disorders using microbe‐based treatments have been limited to use of a few microbial species. We propose that nature‐based materials with high natural diversity, such as the materials tested here, might be more effective in modifying human skin microbiome, and eventually, in reducing immune system disorders. Future studies should investigate how long‐term changes in skin microbiota are achieved and if the exposure induces beneficial changes in the immune system markers.
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Affiliation(s)
- Mira Grönroos
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Anirudra Parajuli
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Olli H Laitinen
- Department of Virology, School of Medicine, University of Tampere, Tampere, Finland
| | - Marja I Roslund
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Heli K Vari
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Heikki Hyöty
- Department of Virology, School of Medicine, University of Tampere, Tampere, Finland.,Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Riikka Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Aki Sinkkonen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
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Sioofy-Khojine AB, Lehtonen J, Nurminen N, Laitinen OH, Oikarinen S, Huhtala H, Pakkanen O, Ruokoranta T, Hankaniemi MM, Toppari J, Vähä-Mäkilä M, Ilonen J, Veijola R, Knip M, Hyöty H. Coxsackievirus B1 infections are associated with the initiation of insulin-driven autoimmunity that progresses to type 1 diabetes. Diabetologia 2018; 61:1193-1202. [PMID: 29404673 DOI: 10.1007/s00125-018-4561-y] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 12/22/2017] [Indexed: 12/17/2022]
Abstract
AIMS/HYPOTHESIS Islet autoimmunity usually starts with the appearance of autoantibodies against either insulin (IAA) or GAD65 (GADA). This categorises children with preclinical type 1 diabetes into two immune phenotypes, which differ in their genetic background and may have different aetiology. The aim was to study whether Coxsackievirus group B (CVB) infections, which have been linked to the initiation of islet autoimmunity, are associated with either of these two phenotypes in children with HLA-conferred susceptibility to type 1 diabetes. METHODS All samples were from children in the Finnish Type 1 Diabetes Prediction and Prevention (DIPP) study. Individuals are recruited to the DIPP study from the general population of new-born infants who carry defined HLA genotypes associated with susceptibility to type 1 diabetes. Our study cohort included 91 children who developed IAA and 78 children who developed GADA as their first appearing single autoantibody and remained persistently seropositive for islet autoantibodies, along with 181 and 151 individually matched autoantibody negative control children, respectively. Seroconversion to positivity for neutralising antibodies was detected as the surrogate marker of CVB infections in serial follow-up serum samples collected before and at the appearance of islet autoantibodies in each individual. RESULTS CVB1 infections were associated with the appearance of IAA as the first autoantibody (OR 2.4 [95% CI 1.4, 4.2], corrected p = 0.018). CVB5 infection also tended to be associated with the appearance of IAA, however, this did not reach statistical significance (OR 2.3, [0.7, 7.5], p = 0.163); no other CVB types were associated with increased risk of IAA. Children who had signs of a CVB1 infection either alone or prior to infections by other CVBs were at the highest risk for developing IAA (OR 5.3 [95% CI 2.4, 11.7], p < 0.001). None of the CVBs were associated with the appearance of GADA. CONCLUSIONS/INTERPRETATION CVB1 infections may contribute to the initiation of islet autoimmunity being particularly important in the insulin-driven autoimmune process.
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Affiliation(s)
- Amir-Babak Sioofy-Khojine
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland.
| | - Jussi Lehtonen
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland
| | - Noora Nurminen
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland
| | - Olli H Laitinen
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland
- Vactech Ltd, Tampere, Finland
| | - Sami Oikarinen
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland
- Fimlab laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Heini Huhtala
- Faculty of Social Sciences, University of Tampere, Tampere, Finland
| | | | | | - Minna M Hankaniemi
- Vactech Ltd, Tampere, Finland
- Biomeditech, University of Tampere, Tampere, Finland
| | - Jorma Toppari
- Institute of Biomedicine, Research Centre of Integrative Physiology and Pharmacology, University of Turku, Turku, Finland
- Department of Paediatrics, Turku University Hospital, Turku, Finland
| | - Mari Vähä-Mäkilä
- Institute of Biomedicine, Research Centre of Integrative Physiology and Pharmacology, University of Turku, Turku, Finland
- Department of Paediatrics, Turku University Hospital, Turku, Finland
| | - Jorma Ilonen
- Immunogenetics Laboratory, Institute of Biomedicine, University of Turku, Turku, Finland
- Department of Clinical Microbiology, Turku University Hospital, Turku, Finland
| | - Riitta Veijola
- Department of Paediatrics, PEDEGO Research Unit, Medical Research Centre, Oulu University, Hospital and University of Oulu, Oulu, Finland
| | - Mikael Knip
- Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
- Tampere Centre for Child Health Research, Tampere University Hospital, Tampere, Finland
- Folkhälsan Research Centre, Helsinki, Finland
| | - Heikki Hyöty
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland
- Fimlab laboratories, Pirkanmaa Hospital District, Tampere, Finland
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Laitinen OH, Svedin E, Kapell S, Hankaniemi MM, Larsson PG, Domsgen E, Stone VM, Määttä JAE, Hyöty H, Hytönen VP, Flodström-Tullberg M. New Coxsackievirus 2A pro and 3C pro protease antibodies for virus detection and discovery of pathogenic mechanisms. J Virol Methods 2018; 255:29-37. [PMID: 29425680 DOI: 10.1016/j.jviromet.2018.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 02/01/2018] [Accepted: 02/01/2018] [Indexed: 12/16/2022]
Abstract
Enteroviruses (EVs), such as the Coxsackie B-viruses (CVBs), are common human pathogens, which can cause severe diseases including meningitis, myocarditis and neonatal sepsis. EVs encode two proteases (2Apro and 3Cpro), which perform the proteolytic cleavage of the CVB polyprotein and also cleave host cell proteins to facilitate viral replication. The 2Apro cause direct damage to the infected heart and tools to investigate 2Apro and 3Cpro expression may contribute new knowledge on virus-induced pathologies. Here, we developed new antibodies to CVB-encoded 2Apro and 3Cpro; Two monoclonal 2Apro antibodies and one 3Cpro antibody were produced. Using cells infected with selected viruses belonging to the EV A, B and C species and immunocytochemistry, we demonstrate that the 3Cpro antibody detects all of the EV species B (EV-B) viruses tested and that the 2Apro antibody detects all EV-B viruses apart from Echovirus 9. We furthermore show that the new antibodies work in Western blotting, immunocyto- and immunohistochemistry, and flow cytometry to detect CVBs. Confocal microscopy demonstrated the expression kinetics of 2Apro and 3Cpro, and revealed a preferential cytosolic localization of the proteases in CVB3 infected cells. In summary, the new antibodies detect proteases that belong to EV species B in cells and tissue using multiple applications.
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Affiliation(s)
- Olli H Laitinen
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital, Stockholm, 141 86, Sweden
| | - Emma Svedin
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital, Stockholm, 141 86, Sweden
| | - Sebastian Kapell
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital, Stockholm, 141 86, Sweden
| | - Minna M Hankaniemi
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, 33520, Finland; Fimlab Laboratories, 33520 Tampere, Finland
| | - Pär G Larsson
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital, Stockholm, 141 86, Sweden
| | - Erna Domsgen
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital, Stockholm, 141 86, Sweden
| | - Virginia M Stone
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital, Stockholm, 141 86, Sweden
| | - Juha A E Määttä
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, 33520, Finland; Fimlab Laboratories, 33520 Tampere, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, 33520, Finland; Fimlab Laboratories, 33520 Tampere, Finland
| | - Vesa P Hytönen
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, 33520, Finland; Fimlab Laboratories, 33520 Tampere, Finland
| | - Malin Flodström-Tullberg
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital, Stockholm, 141 86, Sweden; Faculty of Medicine and Life Sciences, University of Tampere, Tampere, 33520, Finland.
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29
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Parajuli A, Grönroos M, Siter N, Puhakka R, Vari HK, Roslund MI, Jumpponen A, Nurminen N, Laitinen OH, Hyöty H, Rajaniemi J, Sinkkonen A. Urbanization Reduces Transfer of Diverse Environmental Microbiota Indoors. Front Microbiol 2018; 9:84. [PMID: 29467728 PMCID: PMC5808279 DOI: 10.3389/fmicb.2018.00084] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 01/12/2018] [Indexed: 12/17/2022] Open
Abstract
Expanding urbanization is a major factor behind rapidly declining biodiversity. It has been proposed that in urbanized societies, the rarity of contact with diverse environmental microbiota negatively impacts immune function and ultimately increases the risk for allergies and other immune-mediated disorders. Surprisingly, the basic assumption that urbanization reduces exposure to environmental microbiota and its transfer indoors has rarely been examined. We investigated if the land use type around Finnish homes affects the diversity, richness, and abundance of bacterial communities indoors. Debris deposited on standardized doormats was collected in 30 rural and 26 urban households in and near the city of Lahti, Finland, in August 2015. Debris was weighed, bacterial community composition determined by high throughput sequencing of bacterial 16S ribosomal RNA (rRNA) gene on the Illumina MiSeq platform, and the percentage of four different land use types (i.e., built area, forest, transitional, and open area) within 200 m and 2000 m radiuses from each household was characterized. The quantity of doormat debris was inversely correlated with coverage of built area. The diversity of total bacterial, Proteobacterial, Actinobacterial, Bacteroidetes, and Firmicutes communities decreased as the percentage of built area increased. Their richness followed the same pattern except for Firmicutes for which no association was observed. The relative abundance of Proteobacteria and particularly Gammaproteobacteria increased, whereas that of Actinobacteria decreased with increasing built area. Neither Phylum Firmicutes nor Bacteroidetes varied with coverage of built area. Additionally, the relative abundance of potentially pathogenic bacterial families and genera increased as the percentage of built area increased. Interestingly, having domestic animals (including pets) only altered the association between the richness of Gammaproteobacteria and diversity of Firmicutes with the built area coverage suggesting that animal ownership minimally affects transfer of environmental microbiota indoors from the living environment. These results support the hypothesis that people living in densely built areas are less exposed to diverse environmental microbiota than people living in more sparsely built areas.
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Affiliation(s)
- Anirudra Parajuli
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Mira Grönroos
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Nathan Siter
- School of Artitechture, Tampere University of Technology, Tampere, Finland
| | - Riikka Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Heli K. Vari
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Marja I. Roslund
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Ari Jumpponen
- Division of Biology, Kansas State University, Manhattan, KS, United States
| | - Noora Nurminen
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Olli H. Laitinen
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Heikki Hyöty
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Juho Rajaniemi
- School of Artitechture, Tampere University of Technology, Tampere, Finland
| | - Aki Sinkkonen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
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30
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Stone VM, Hankaniemi MM, Svedin E, Sioofy-Khojine A, Oikarinen S, Hyöty H, Laitinen OH, Hytönen VP, Flodström-Tullberg M. A Coxsackievirus B vaccine protects against virus-induced diabetes in an experimental mouse model of type 1 diabetes. Diabetologia 2018; 61:476-481. [PMID: 29151123 PMCID: PMC6448957 DOI: 10.1007/s00125-017-4492-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 10/04/2017] [Indexed: 11/16/2022]
Abstract
AIMS/HYPOTHESIS Epidemiological studies suggest a role for Coxsackievirus B (CVB) serotypes in the pathogenesis of type 1 diabetes, but their actual contribution remains elusive. In the present study, we have produced a CVB1 vaccine to test whether vaccination against CVBs can prevent virus-induced diabetes in an experimental model. METHODS NOD and SOCS1-tg mice were vaccinated three times with either a formalin-fixed non-adjuvanted CVB1 vaccine or a buffer control. Serum was collected for measurement of neutralising antibodies using a virus neutralisation assay. Vaccinated and buffer-treated mice were infected with CVB1. Viraemia and viral replication in the pancreas were measured using standard plaque assay and PCR. The development of diabetes was monitored by blood glucose measurements. Histological analysis and immunostaining for viral capsid protein 1 (VP1), insulin and glucagon in formalin-fixed paraffin embedded pancreas was performed. RESULTS The CVB1 vaccine induced strong neutralising antibody responses and protected against viraemia and the dissemination of virus to the pancreas in both NOD mice (n = 8) and SOCS1-tg mice (n = 7). Conversely, 100% of the buffer-treated NOD and SOCS1-tg mice were viraemic on day 3 post infection. Furthermore, half (3/6) of the buffer-treated SOCS1-tg mice developed diabetes upon infection with CVB1, with a loss of the insulin-positive beta cells and damage to the exocrine pancreas. In contrast, all (7/7) vaccinated SOCS1-tg mice were protected from virus-induced diabetes and showed no signs of beta cell loss or pancreas destruction (p < 0.05). CONCLUSIONS/INTERPRETATION CVB1 vaccine can efficiently protect against both CVB1 infection and CVB1-induced diabetes. This preclinical proof of concept study provides a base for further studies aimed at developing a vaccine for use in elucidating the role of enteroviruses in human type 1 diabetes.
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Affiliation(s)
- Virginia M Stone
- The Center for Infectious Medicine, Department of Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, F59, SE-141 86, Stockholm, Sweden
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Minna M Hankaniemi
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Emma Svedin
- The Center for Infectious Medicine, Department of Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, F59, SE-141 86, Stockholm, Sweden
| | | | - Sami Oikarinen
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Olli H Laitinen
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Vesa P Hytönen
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Malin Flodström-Tullberg
- The Center for Infectious Medicine, Department of Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, F59, SE-141 86, Stockholm, Sweden.
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland.
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31
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Saarinen NVV, Laiho JE, Richardson SJ, Zeissler M, Stone VM, Marjomäki V, Kantoluoto T, Horwitz MS, Sioofy-Khojine A, Honkimaa A, Hankaniemi MM, Flodström-Tullberg M, Hyöty H, Hytönen VP, Laitinen OH. A novel rat CVB1-VP1 monoclonal antibody 3A6 detects a broad range of enteroviruses. Sci Rep 2018; 8:33. [PMID: 29311608 PMCID: PMC5758616 DOI: 10.1038/s41598-017-18495-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 12/12/2017] [Indexed: 11/09/2022] Open
Abstract
Enteroviruses (EVs) are common RNA viruses that cause diseases ranging from rash to paralytic poliomyelitis. For example, EV-A and EV-C viruses cause hand-foot and mouth disease and EV-B viruses cause encephalitis and myocarditis, which can result in severe morbidity and mortality. While new vaccines and treatments for EVs are under development, methods for studying and diagnosing EV infections are still limited and therefore new diagnostic tools are required. Our aim was to produce and characterize new antibodies that work in multiple applications and detect EVs in tissues and in vitro. Rats were immunized with Coxsackievirus B1 capsid protein VP1 and hybridomas were produced. Hybridoma clones were selected based on their reactivity in different immunoassays. The most promising clone, 3A6, was characterized and it performed well in multiple techniques including ELISA, immunoelectron microscopy, immunocyto- and histochemistry and in Western blotting, detecting EVs in infected cells and tissues. It recognized several EV-Bs and also the EV-C representative Poliovirus 3, making it a broad-spectrum EV specific antibody. The 3A6 rat monoclonal antibody can help to overcome some of the challenges faced with commonly used EV antibodies: it enables simultaneous use of mouse-derived antibodies in double staining and it is useful in murine models.
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Affiliation(s)
- Niila V V Saarinen
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Jutta E Laiho
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | | | | | - Virginia M Stone
- Department of Medicine HS, Karolinska Institutet, Stockholm, Sweden
| | - Varpu Marjomäki
- Department of Biological and Environmental Science/Nanoscience center, University of Jyväskylä, Jyväskylä, Finland
| | - Tino Kantoluoto
- Department of Biological and Environmental Science/Nanoscience center, University of Jyväskylä, Jyväskylä, Finland
| | - Marc S Horwitz
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, Vancouver, Canada
| | | | - Anni Honkimaa
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Minna M Hankaniemi
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | | | - Heikki Hyöty
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland.,Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Vesa P Hytönen
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland.,Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Olli H Laitinen
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland.
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32
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Svedin E, Utorova R, Hühn MH, Larsson PG, Stone VM, Garimella M, Lind K, Hägglöf T, Pincikova T, Laitinen OH, McInerney GM, Scholte B, Hjelte L, Karlsson MCI, Flodström-Tullberg M. A Link Between a Common Mutation in CFTR and Impaired Innate and Adaptive Viral Defense. J Infect Dis 2017; 216:1308-1317. [PMID: 28968805 PMCID: PMC5853514 DOI: 10.1093/infdis/jix474] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 09/06/2017] [Indexed: 12/19/2022] Open
Abstract
Acute respiratory virus infections predispose the cystic fibrosis (CF) lung to chronic bacterial colonization, which contributes to high mortality. For reasons unknown, respiratory virus infections have a prolonged duration in CF. Here, we demonstrate that mice carrying the most frequent cystic fibrosis transmembrane conductance regulator (CFTR) mutation in humans, ΔF508, show increased morbidity and mortality following infection with a common human enterovirus. ΔF508 mice demonstrated impaired viral clearance, a slower type I interferon response and delayed production of virus-neutralizing antibodies. While the ΔF508 mice had a normal immune cell repertoire, unchanged serum immunoglobulin concentrations and an intact immune response to a T-cell-independent antigen, their response to a T-cell-dependent antigen was significantly delayed. Our studies reveal a novel function for CFTR in antiviral immunity and demonstrate that the ΔF508 mutation in cftr is coupled to an impaired adaptive immune response. This important insight could open up new approaches for patient care and treatment.
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Affiliation(s)
- Emma Svedin
- Center for Infectious Medicine, Department of Medicine
| | | | | | - Pär G Larsson
- Center for Infectious Medicine, Department of Medicine
| | | | | | | | | | - Terezia Pincikova
- Center for Infectious Medicine, Department of Medicine
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, and Stockholm Cystic Fibrosis Center, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | | | | | - Bob Scholte
- Department of Cell Biology and Pediatric Pulmonology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Lena Hjelte
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, and Stockholm Cystic Fibrosis Center, Karolinska University Hospital Huddinge, Stockholm, Sweden
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Hankaniemi MM, Laitinen OH, Stone VM, Sioofy-Khojine A, Määttä JAE, Larsson PG, Marjomäki V, Hyöty H, Flodström-Tullberg M, Hytönen VP. Optimized production and purification of Coxsackievirus B1 vaccine and its preclinical evaluation in a mouse model. Vaccine 2017; 35:3718-3725. [PMID: 28579231 DOI: 10.1016/j.vaccine.2017.05.057] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 05/19/2017] [Accepted: 05/20/2017] [Indexed: 10/19/2022]
Abstract
Coxsackie B viruses are among the most common enteroviruses, causing a wide range of diseases. Recent studies have also suggested that they may contribute to the development of type 1 diabetes. Vaccination would provide an effective way to prevent CVB infections, and the objective of this study was to develop an efficient vaccine production protocol for the generation of novel CVB vaccines. Various steps in the production of a formalin-inactivated Coxsackievirus B1 (CVB1) vaccine were optimized including the Multiplicity Of Infection (MOI) used for virus amplification, virus cultivation time, type of cell growth medium, virus purification method and formulation of the purified virus. Safety and immunogenicity of the formalin inactivated CVB1 vaccine was characterized in a mouse model. Two of the developed methods were found to be optimal for virus purification: the first employed PEG-precipitation followed by gelatin-chromatography and sucrose cushion pelleting (three-step protocol), yielding 19-fold increase in virus concentration (0.06µg/cm2) as compared to gold standard method. The second method utilized tandem sucrose pelleting without a PEG precipitation step, yielding 83-fold increase in virus concentration (0.24µg/cm2), but it was more labor-intensive and cannot be efficiently scaled up. Both protocols provide radically higher virus yields compared with traditional virus purification protocols involving PEG-precipitation and sucrose gradient ultracentrifugation. Formalin inactivation of CVB1 produced a vaccine that induced a strong, virus-neutralizing antibody response in vaccinated mice, which protected against challenge with CVB1 virus. Altogether, these results provide valuable information for the development of new enterovirus vaccines.
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Affiliation(s)
- Minna M Hankaniemi
- Faculty of Medicine and Life Sciences, University of Tampere, FI-33520 Tampere, Finland; Fimlab Laboratories, FI-33520 Tampere, Finland
| | - Olli H Laitinen
- Faculty of Medicine and Life Sciences, University of Tampere, FI-33520 Tampere, Finland; Fimlab Laboratories, FI-33520 Tampere, Finland
| | - Virginia M Stone
- Faculty of Medicine and Life Sciences, University of Tampere, FI-33520 Tampere, Finland; The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital Huddinge, F59, SE-141 86 Stockholm, Sweden
| | - Amirbabak Sioofy-Khojine
- Faculty of Medicine and Life Sciences, University of Tampere, FI-33520 Tampere, Finland; Fimlab Laboratories, FI-33520 Tampere, Finland
| | - Juha A E Määttä
- Faculty of Medicine and Life Sciences, University of Tampere, FI-33520 Tampere, Finland; Fimlab Laboratories, FI-33520 Tampere, Finland
| | - Pär G Larsson
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital Huddinge, F59, SE-141 86 Stockholm, Sweden
| | - Varpu Marjomäki
- Department of Biological and Environmental Science/Nanoscience Center, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä, Finland
| | - Heikki Hyöty
- Faculty of Medicine and Life Sciences, University of Tampere, FI-33520 Tampere, Finland; Fimlab Laboratories, FI-33520 Tampere, Finland
| | - Malin Flodström-Tullberg
- Faculty of Medicine and Life Sciences, University of Tampere, FI-33520 Tampere, Finland; The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital Huddinge, F59, SE-141 86 Stockholm, Sweden
| | - Vesa P Hytönen
- Faculty of Medicine and Life Sciences, University of Tampere, FI-33520 Tampere, Finland; Fimlab Laboratories, FI-33520 Tampere, Finland.
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Honkanen H, Oikarinen S, Nurminen N, Laitinen OH, Huhtala H, Lehtonen J, Ruokoranta T, Hankaniemi MM, Lecouturier V, Almond JW, Tauriainen S, Simell O, Ilonen J, Veijola R, Viskari H, Knip M, Hyöty H. Detection of enteroviruses in stools precedes islet autoimmunity by several months: possible evidence for slowly operating mechanisms in virus-induced autoimmunity. Diabetologia 2017; 60:424-431. [PMID: 28070615 DOI: 10.1007/s00125-016-4177-z] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 11/14/2016] [Indexed: 12/15/2022]
Abstract
AIMS/HYPOTHESIS This case-control study was nested in a prospective birth cohort to evaluate whether the presence of enteroviruses in stools was associated with the appearance of islet autoimmunity in the Type 1 Diabetes Prediction and Prevention study in Finland. METHODS Altogether, 1673 longitudinal stool samples from 129 case children who turned positive for multiple islet autoantibodies and 3108 stool samples from 282 matched control children were screened for the presence of enterovirus RNA using RT-PCR. Viral genotype was detected by sequencing. RESULTS Case children had more enterovirus infections than control children (0.8 vs 0.6 infections per child). Time-dependent analysis indicated that this excess of infections occurred more than 1 year before the first detection of islet autoantibodies (6.3 vs 2.1 infections per 10 follow-up years). No such difference was seen in infections occurring less than 1 year before islet autoantibody seroconversion or after seroconversion. The most frequent enterovirus types included coxsackievirus A4 (28% of genotyped viruses), coxsackievirus A2 (14%) and coxsackievirus A16 (11%). CONCLUSIONS/INTERPRETATION The results suggest that enterovirus infections diagnosed by detecting viral RNA in stools are associated with the development of islet autoimmunity with a time lag of several months.
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Affiliation(s)
- Hanna Honkanen
- Department of Virology, University of Tampere, PL100, 33014, Tampereen yliopisto, Finland.
| | - Sami Oikarinen
- Department of Virology, University of Tampere, PL100, 33014, Tampereen yliopisto, Finland
- Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Noora Nurminen
- Department of Virology, University of Tampere, PL100, 33014, Tampereen yliopisto, Finland
| | - Olli H Laitinen
- Vactech Ltd, Tampere, Finland
- BioMediTech, University of Tampere, Tampere, Finland
| | - Heini Huhtala
- School of Health Sciences, University of Tampere, Tampere, Finland
| | - Jussi Lehtonen
- Department of Virology, University of Tampere, PL100, 33014, Tampereen yliopisto, Finland
| | | | - Minna M Hankaniemi
- Vactech Ltd, Tampere, Finland
- BioMediTech, University of Tampere, Tampere, Finland
| | | | | | | | - Olli Simell
- Department of Pediatrics and Research Centre of Applied and Preventive Cardiovascular Medicine, University of Turku, Turku, Finland
- Department of Pediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland
| | - Jorma Ilonen
- Immunogenetics Laboratory, University of Turku and Turku University Hospital, Turku, Finland
| | - Riitta Veijola
- Department of Pediatrics, PEDEGO Research Unit, Medical Research Center, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Hanna Viskari
- Department of Virology, University of Tampere, PL100, 33014, Tampereen yliopisto, Finland
- Department of Internal Medicine, Tampere University Hospital, Tampere, Finland
| | - Mikael Knip
- Children's Hospital, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
- Department of Pediatrics, Tampere University Hospital, Tampere, Finland
- Folkhälsan Research Center, Helsinki, Finland
| | - Heikki Hyöty
- Department of Virology, University of Tampere, PL100, 33014, Tampereen yliopisto, Finland
- Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
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Lind K, Svedin E, Domsgen E, Kapell S, Laitinen OH, Moll M, Flodström-Tullberg M. Coxsackievirus counters the host innate immune response by blocking type III interferon expression. J Gen Virol 2016; 97:1368-1380. [PMID: 26935471 DOI: 10.1099/jgv.0.000443] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Type I IFNs play an important role in the immune response to enterovirus infections. Their importance is underscored by observations showing that many enteroviruses including coxsackie B viruses (CVBs) have developed strategies to block type I IFN production. Recent studies have highlighted a role for the type III IFNs (also called IFNλs) in reducing permissiveness to infections with enteric viruses including coxsackievirus. However, whether or not CVBs have measures to evade the effects of type III IFNs remains unknown. By combining virus infection studies and different modes of administrating the dsRNA mimic poly I : C, we discovered that CVBs target both TLR3- and MDA5/RIG-I-mediated type III IFN expression. Consistent with this, the cellular protein expression levels of the signal transduction proteins TRIF and IPS1 were reduced and no hyperphosphorylation of IRF-3 was observed following infection with the virus. Notably, decreased expression of full-length TRIF and IPS1 and the appearance of cleavage products was observed upon both CVB3 infection and in cellular protein extracts incubated with recombinant 2Apro, indicating an important role for the viral protease in subverting the cellular immune system. Collectively, our study reveals that CVBs block the expression of type III IFNs, and that this is achieved by a similar mechanism as the virus uses to block type I IFN production. We also demonstrate that the virus blocks several intracellular viral recognition pathways of importance for both type I and III IFN production. The simultaneous targeting of numerous arms of the host immune response may be required for successful viral replication and dissemination.
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Affiliation(s)
- Katharina Lind
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Emma Svedin
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Erna Domsgen
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Sebastian Kapell
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Olli H Laitinen
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Markus Moll
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Malin Flodström-Tullberg
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden
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Laitinen OH, Svedin E, Kapell S, Nurminen A, Hytönen VP, Flodström-Tullberg M. Enteroviral proteases: structure, host interactions and pathogenicity. Rev Med Virol 2016; 26:251-67. [PMID: 27145174 PMCID: PMC7169145 DOI: 10.1002/rmv.1883] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 03/22/2016] [Accepted: 03/23/2016] [Indexed: 12/22/2022]
Abstract
Enteroviruses are common human pathogens, and infections are particularly frequent in children. Severe infections can lead to a variety of diseases, including poliomyelitis, aseptic meningitis, myocarditis and neonatal sepsis. Enterovirus infections have also been implicated in asthmatic exacerbations and type 1 diabetes. The large disease spectrum of the closely related enteroviruses may be partially, but not fully, explained by differences in tissue tropism. The molecular mechanisms by which enteroviruses cause disease are poorly understood, but there is increasing evidence that the two enteroviral proteases, 2Apro and 3Cpro, are important mediators of pathology. These proteases perform the post‐translational proteolytic processing of the viral polyprotein, but they also cleave several host‐cell proteins in order to promote the production of new virus particles, as well as to evade the cellular antiviral immune responses. Enterovirus‐associated processing of cellular proteins may also contribute to pathology, as elegantly demonstrated by the 2Apro‐mediated cleavage of dystrophin in cardiomyocytes contributing to Coxsackievirus‐induced cardiomyopathy. It is likely that improved tools to identify targets for these proteases will reveal additional host protein substrates that can be linked to specific enterovirus‐associated diseases. Here, we discuss the function of the enteroviral proteases in the virus replication cycle and review the current knowledge regarding how these proteases modulate the infected cell in order to favour virus replication, including ways to avoid detection by the immune system. We also highlight new possibilities for the identification of protease‐specific cellular targets and thereby a way to discover novel mechanisms contributing to disease. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Olli H Laitinen
- BioMediTech, Finland and Fimlab Laboratories, University of Tampere, Tampere, Finland
| | - Emma Svedin
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Stockholm, Sweden
| | - Sebastian Kapell
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Stockholm, Sweden
| | - Anssi Nurminen
- BioMediTech, Finland and Fimlab Laboratories, University of Tampere, Tampere, Finland
| | - Vesa P Hytönen
- BioMediTech, Finland and Fimlab Laboratories, University of Tampere, Tampere, Finland
| | - Malin Flodström-Tullberg
- BioMediTech, Finland and Fimlab Laboratories, University of Tampere, Tampere, Finland.,The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Stockholm, Sweden
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Larsson PG, Lakshmikanth T, Laitinen OH, Utorova R, Jacobson S, Oikarinen M, Domsgen E, Koivunen MRL, Chaux P, Devard N, Lecouturier V, Almond J, Knip M, Hyöty H, Flodström-Tullberg M. A preclinical study on the efficacy and safety of a new vaccine against Coxsackievirus B1 reveals no risk for accelerated diabetes development in mouse models. Diabetologia 2015; 58:346-54. [PMID: 25370797 DOI: 10.1007/s00125-014-3436-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Accepted: 10/09/2014] [Indexed: 02/07/2023]
Abstract
AIMS/HYPOTHESIS Enterovirus infections have been implicated in the aetiology of autoimmune type 1 diabetes. A vaccine could be used to test the causal relationship between enterovirus infections and diabetes development. However, the development of a vaccine against a virus suspected to induce an autoimmune disease is challenging, since the vaccine itself might trigger autoimmunity. Another challenge is to select the enterovirus serotypes to target with a vaccine. Here we aimed to evaluate the function and autoimmune safety of a novel non-adjuvanted prototype vaccine to Coxsackievirus serotype B1 (CVB1), a member of the enterovirus genus. METHODS A formalin-inactivated CVB1 vaccine was developed and tested for its immunogenicity and safety in BALB/c and NOD mice. Prediabetic NOD mice were vaccinated, infected with CVB1 or mock-treated to compare the effect on diabetes development. RESULTS Vaccinated mice produced high titres of CVB1-neutralising antibodies without signs of vaccine-related side effects. Vaccinated mice challenged with CVB1 had significantly reduced levels of replicating virus in their blood and the pancreas. Prediabetic NOD mice demonstrated an accelerated onset of diabetes upon CVB1 infection whereas no accelerated disease manifestation or increased production of insulin autoantibodies was observed in vaccinated mice. CONCLUSIONS/INTERPRETATION We conclude that the prototype vaccine is safe and confers protection from infection without accelerating diabetes development in mice. These results encourage the development of a multivalent enterovirus vaccine for human use, which could be used to determine whether enterovirus infections trigger beta cell autoimmunity and type 1 diabetes in humans.
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Affiliation(s)
- Pär G Larsson
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital Huddinge F59, SE-141 86, Stockholm, Sweden
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Laitinen OH, Honkanen H, Pakkanen O, Oikarinen S, Hankaniemi MM, Huhtala H, Ruokoranta T, Lecouturier V, André P, Harju R, Virtanen SM, Lehtonen J, Almond JW, Simell T, Simell O, Ilonen J, Veijola R, Knip M, Hyöty H. Coxsackievirus B1 is associated with induction of β-cell autoimmunity that portends type 1 diabetes. Diabetes 2014; 63:446-55. [PMID: 23974921 DOI: 10.2337/db13-0619] [Citation(s) in RCA: 176] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The rapidly increasing incidence of type 1 diabetes implies that environmental factors are involved in the pathogenesis. Enteroviruses are among the suspected environmental triggers of the disease, and the interest in exploring the possibilities to develop vaccines against these viruses has increased. Our objective was to identify enterovirus serotypes that could be involved in the initiation of the disease process by screening neutralizing antibodies against 41 different enterovirus types in a unique longitudinal sample series from a large prospective birth-cohort study. The study participants comprised 183 case children testing persistently positive for at least two diabetes-predictive autoantibodies and 366 autoantibody-negative matched control children. Coxsackievirus B1 was associated with an increased risk of β-cell autoimmunity. This risk was strongest when infection occurred a few months before autoantibodies appeared and was attenuated by the presence of maternal antibodies against the virus. Two other coxsackieviruses, B3 and B6, were associated with a reduced risk, with an interaction pattern, suggesting immunological cross-protection against coxsackievirus B1. These results support previous observations suggesting that the group B coxsackieviruses are associated with the risk of type 1 diabetes. The clustering of the risk and protective viruses to this narrow phylogenetic lineage supports the biological plausibility of this phenomenon.
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Honkanen H, Oikarinen S, Pakkanen O, Ruokoranta T, Pulkki MM, Laitinen OH, Tauriainen S, Korpela S, Lappalainen M, Vuorinen T, Haapala AM, Veijola R, Simell O, Ilonen J, Knip M, Hyöty H. Human enterovirus 71 strains in the background population and in hospital patients in Finland. J Clin Virol 2012; 56:348-53. [PMID: 23261080 DOI: 10.1016/j.jcv.2012.11.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Revised: 11/21/2012] [Accepted: 11/26/2012] [Indexed: 11/25/2022]
Abstract
BACKGROUND Human enterovirus 71 (HEV71) is a common cause of severe outbreaks of hand-foot- and mouth disease, aseptic meningitis and encephalitis in Asian populations but has not caused such epidemics in all populations. OBJECTIVES To analyze the frequency of HEV71 in the background childhood population in Finland by screening in stool and serum samples and by measuring neutralizing antibodies against HEV71 in serum and to compare the genetic relationship of virus strains detected in asymptomatic children and those causing severe illness in Finland to the strains found in other countries. STUDY DESIGN 4185 stool samples and 5686 serum samples were collected and clinical symptoms recorded from children who were observed from birth. Additional stool samples were available from four children hospitalized due to EV71 infection. Samples were screened for the presence of RNA of human enteroviruses using RT-PCR and HEV71 amplicons were identified by sequencing. Phylogenetic analyses were carried out to study genetic relationships between different virus strains. Neutralizing antibodies against HEV71 were screened from 522 children. RESULTS A total of 0.3% of stool samples and two serum samples from healthy children were positive for HEV71 genome. 1.6% of the children had neutralizing antibodies against HEV71. Most infections were asymptomatic or mild in contrast to the clear symptoms in the children hospitalized due to HEV71. All viruses were C strains. CONCLUSIONS HEV71 is circulating in Finland but it is rare. No clear difference was seen between strains circulating in the Finnish background population and those found in hospitalized patients or those causing severe outbreaks worldwide.
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Heikura T, Nieminen T, Roschier MM, Karvinen H, Kaikkonen MU, Mähönen AJ, Lesch HP, Rissanen TT, Laitinen OH, Airenne KJ, Ylä-Herttuala S. Baculovirus-mediated vascular endothelial growth factor-D(ΔNΔC) gene transfer induces angiogenesis in rabbit skeletal muscle. J Gene Med 2012; 14:35-43. [PMID: 22162149 DOI: 10.1002/jgm.1637] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Occluded arteries and ischemic tissues cannot always be treated by angioplasty, stenting or by-pass-surgery. Under such circumstances, viral gene therapy may be useful in inducing increased blood supply to ischemic area. There is evidence of improved blood flow in ischemic skeletal muscle and myocardium in both animal and human studies using adenoviral vascular endothelial growth factor (VEGF) gene therapy. However, the expression is transient and repeated gene transfers with the same vector are inefficient due to immune responses. METHODS Different baculoviral vectors pseudotyped with or without vesicular stomatitis virus glycoprotein (VSV-G) and/or carrying woodchuck hepatitis virus post-transcriptional regulatory element (Wpre) were tested both in vitro and in vivo. VEGF-D(ΔNΔC) was used as therapeutic transgene and lacZ as a control. In vivo efficacy was evaluated as capillary enlargement and transgene expression in New Zealand White (NZW) rabbit skeletal muscle. RESULTS A statistically significant capillary enlargement was detected 6 days after gene transfer in transduced areas compared to the control gene transfers with baculovirus and adenovirus encoding β-galactosidase (lacZ). Substantially improved gene transfer efficiency was achieved with a modified baculovirus pseudotyped with VSV-G and carrying Wpre. Dose escalation experiments revealed that either too large volume or too many virus particles caused inflammation and necrosis in the target tissue, whereas 10(9) plaque forming units injected in multiple aliquots resulted in transgene expression with only mild immune reactions. CONCLUSIONS We show the first evidence of biologically significant baculoviral gene transfer in skeletal muscle of NZW rabbits using VEGF-D(ΔNΔC) as a therapeutic transgene.
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Affiliation(s)
- Tommi Heikura
- Department of Biotechnology and Molecular Medicine, AI Virtanen Institute, University of Eastern Finland, Kuopio, Finland
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Airenne KJ, Laitinen OH, Mähönen AJ, Ylä-Herttuala S. Transduction of vertebrate cells with recombinant baculovirus. Cold Spring Harb Protoc 2010; 2009:pdb.prot5182. [PMID: 20147117 DOI: 10.1101/pdb.prot5182] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Viitanen L, Toivanen PI, Nieminen T, Alitalo A, Roschier M, Jauhiainen S, Markkanen JE, Laitinen OH, Airenne TT, Salminen TA, Johnson MS, Airenne KJ, Ylä-Herttuala S. Homology modeling of VEGF-D as a basis for structural and functional analysis. Acta Crystallogr A 2009. [DOI: 10.1107/s0108767309096688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kärkkäinen HR, Lesch HP, Määttä AI, Toivanen PI, Mähönen AJ, Roschier MM, Airenne KJ, Laitinen OH, Ylä-Herttuala S. A 96-well format for a high-throughput baculovirus generation, fast titering and recombinant protein production in insect and mammalian cells. BMC Res Notes 2009; 2:63. [PMID: 19389242 PMCID: PMC2680411 DOI: 10.1186/1756-0500-2-63] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2008] [Accepted: 04/23/2009] [Indexed: 11/10/2022] Open
Abstract
Background Baculovirus expression vector system (BEVS) has become a standard in recombinant protein production and virus-like particle preparation for numerous applications. Findings We describe here protocols which adapt baculovirus generation into 96-well format. Conclusion The established methodology allows simple baculovirus generation, fast virus titering within 18 h and efficient recombinant protein production in a high-throughput format. Furthermore, the produced baculovirus vectors are compatible with gene expression in vertebrate cells in vitro and in vivo.
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Affiliation(s)
- Hanna-Riikka Kärkkäinen
- Department of Biotechnology and Molecular Medicine, A.I. Virtanen Institute for Molecular Sciences, Kuopio, Finland.
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Toivanen PI, Nieminen T, Viitanen L, Alitalo A, Roschier M, Jauhiainen S, Markkanen JE, Laitinen OH, Airenne TT, Salminen TA, Johnson MS, Airenne KJ, Ylä-Herttuala S. Novel vascular endothelial growth factor D variants with increased biological activity. J Biol Chem 2009; 284:16037-48. [PMID: 19366703 DOI: 10.1074/jbc.m109.001123] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Members of the vascular endothelial growth factor (VEGF) family play a pivotal role in angiogenesis and lymphangiogenesis. They are potential therapeutics to induce blood vessel formation in myocardium and skeletal muscle, when normal blood flow is compromised. Most members of the VEGF/platelet derived growth factor protein superfamily exist as covalently bound antiparallel dimers. However, the mature form of VEGF-D (VEGF-D(DeltaNDeltaC)) is predominantly a non-covalent dimer even though the cysteine residues (Cys-44 and Cys-53) forming the intersubunit disulfide bridges in the other members of the VEGF family are also conserved in VEGF-D. Moreover, VEGF-D bears an additional cysteine residue (Cys-25) at the subunit interface. Guided by our model of VEGF-D(DeltaNDeltaC), the cysteines at the subunit interface were mutated to study the effect of these residues on the structural and functional properties of VEGF-D(DeltaNDeltaC). The conserved cysteines Cys-44 and Cys-53 were found to be essential for the function of VEGF-D(DeltaNDeltaC). More importantly, the substitution of the Cys-25 at the dimer interface by various amino acids improved the activity of the recombinant VEGF-D(DeltaNDeltaC) and increased the dimer to monomer ratio. Specifically, substitutions to hydrophobic amino acids Ile, Leu, and Val, equivalent to those found in other VEGFs, most favorably affected the activity of the recombinant VEGF-D(DeltaNDeltaC). The increased activity of these mutants was mainly due to stabilization of the protein. This study enables us to better understand the structural determinants controlling the biological activity of VEGF-D. The novel variants of VEGF-D(DeltaNDeltaC) described here are potential agents for therapeutic applications, where induction of vascular formation is required.
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Affiliation(s)
- Pyry I Toivanen
- Department of Biotechnology and Molecular Medicine, A. I. Virtanen Institute for Molecular Sciences, FI-70211 Kuopio, Finland
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Airenne KJ, Laitinen OH, Mähönen AJ, Ylä-Herttuala S. Preparation of recombinant baculoviruses with the BVboost system. Cold Spring Harb Protoc 2009; 2009:pdb.prot5181. [PMID: 20147116 DOI: 10.1101/pdb.prot5181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
INTRODUCTIONWe have developed an improved transposition-based system (BVboost) for the generation of recombinant baculoviruses. This system bypasses the disadvantages of the original transposition-based generation of baculoviral genomes in Escherichia coli while remaining a simple, rapid, and convenient viral production technique. The method is based on the modified donor vector (pBVboost) and an improved selection scheme of the baculoviral genomes (bacmids) in E. coli with a mutated sacB gene. Recombinant bacmids can be generated at a frequency of ~107/μg of donor vector with a negligible background. The BVboost system also allows efficient setups for high-throughput screening and gene expression purposes. After cloning the desired gene/cDNA/library into a BVboost system-compatible donor plasmid, the recombinant baculoviral genome is prepared simply by transforming electrocompetent DH10BacΔTn7 E. coli cells with the donor. Transfer from the donor vector into the baculoviral genome (bacmid) occurs via a Tn7-mediated site-specific transposition reaction in E. coli cells. The selection scheme guarantees that virtually all colonies are correct. The recombinant baculoviral genome is subsequently extracted from E. coli culture using a modified isolation procedure for large plasmids. To generate the recombinant viruses, insect cells are transfected with the isolated recombinant bacmid. This protocol provides instructions on how to prepare recombinant baculoviruses by the BVboost system in order to express the desired gene(s) in insect and/or vertebrate cells.
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Laitinen OH, Nordlund HR, Hytönen VP, Kulomaa MS. Brave new (strept)avidins in biotechnology. Trends Biotechnol 2007; 25:269-77. [PMID: 17433846 DOI: 10.1016/j.tibtech.2007.04.001] [Citation(s) in RCA: 139] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2006] [Revised: 02/27/2007] [Accepted: 04/03/2007] [Indexed: 11/27/2022]
Abstract
Avidin and streptavidin are widely used in (strept)avidin-biotin technology, which is based on their tight biotin-binding capability. These techniques are exceptionally diverse, ranging from simple purification and labeling methods to sophisticated drug pre-targeting and nanostructure-building approaches. Improvements in protein engineering have provided new possibilities to develop tailored protein tools. The (strept)avidin scaffold has been engineered to extend the existing range of applications and to develop new ones. Modifications to (strept)avidins--such as simple amino acid substitutions to reduce biotin binding and alter physico-chemical characters--have recently developed into more sophisticated changes, including chimeric (strept)avidins, topology rearrangements and stitching of non-natural amino acids into the active sites. In this review, we highlight the current status in genetically engineered (strept)avidins and illustrate their versatility as advanced tools in the multiple fields of modern bioscience, medicine and nanotechnology.
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Affiliation(s)
- Olli H Laitinen
- A.I. Virtanen Institute, Department of Molecular Medicine, University of Kuopio, P.O. Box 1627, FI-70211 Kuopio, Finland
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Abstract
Chicken avidin and bacterial streptavidin, (strept)avidin, are proteins widely utilized in a number of applications in life science, ranging from purification and labeling techniques to diagnostics, and from targeted drug delivery to nanotechnology. (Strept)avidin-biotin technology relies on the extremely tight and specific affinity between (strept)avidin and biotin (dissociation constant, K(d) approximately 10(-14)-10(-16) M). (Strept)avidins are also exceptionally stable proteins. To study their ligand binding and stability characteristics, the two proteins have been extensively modified both chemically and genetically. There are excellent accounts of this technology and chemically modified (strept)avidins, but no comprehensive reviews exist concerning genetically engineered (strept)avidins. To fill this gap, we here go through the genetically engineered (strept)avidins, summarizing how these constructs were designed and how they have improved our understanding of the structural and functional characteristics of these proteins, and the benefits they have provided for (strept)avidin-biotin technology.
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Affiliation(s)
- O H Laitinen
- A. I. Virtanen Institute, Department of Molecular Medicine, University of Kuopio, P. O. Box 1627, 70211, Kuopio, Finland
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Hytönen VP, Nordlund HR, Hörhä J, Nyholm TKM, Hyre DE, Kulomaa T, Porkka EJ, Marttila AT, Stayton PS, Laitinen OH, Kulomaa MS. Dual-affinity avidin molecules. Proteins 2006; 61:597-607. [PMID: 16175628 DOI: 10.1002/prot.20604] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A recently reported dual-chain avidin was modified further to contain two distinct, independent types of ligand-binding sites within a single polypeptide chain. Chicken avidin is normally a tetrameric glycoprotein that binds water-soluble d-biotin with extreme affinity (K(d) approximately 10(-15) M). Avidin is utilized in various applications and techniques in the life sciences and in the nanosciences. In a recent study, we described a novel avidin monomer-fusion chimera that joins two circularly permuted monomers into a single polypeptide chain. Two of these dual-chain avidins were observed to associate spontaneously to form a dimer equivalent to the wt tetramer. In the present study, we successfully used this scaffold to generate avidins in which the neighboring biotin-binding sites of dual-chain avidin exhibit two different affinities for biotin. In these novel avidins, one of the two binding sites in each polypeptide chain, the pseudodimer, is genetically modified to have lower binding affinity for biotin, whereas the remaining binding site still exhibits the high-affinity characteristic of the wt protein. The pseudotetramer (i.e., a dimer of dual-chain avidins) has two high and two lower affinity biotin-binding sites. The usefulness of these novel proteins was demonstrated by immobilizing dual-affinity avidin with its high-affinity sites. The sites with lower affinity were then used for affinity purification of a biotinylated enzyme. These "dual-affinity" avidin molecules open up wholly new possibilities in avidin-biotin technology, where they may have uses as novel bioseparation tools, carrier proteins, or nanoscale adapters.
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Affiliation(s)
- Vesa P Hytönen
- NanoScience Center, Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
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Heikura TT, Roschier MM, Mahonen AJ, Lesch HP, Rissanen TT, Laitinen OH, Airenne KJ, Yla-Herttuala S. 163. Baculovirus-Mediated Gene Transfer in New Zealand White Rabbit Skeletal Muscle. Mol Ther 2006. [DOI: 10.1016/j.ymthe.2006.08.186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Lesch HP, Pikkarainen JT, Wirth T, Kaikkonen MU, Laitinen OH, Airenne KJ, Yla- Herttuala S. 813. Targeted Delivery of Biotinylated Compounds by Lodavin™, LDL-Receptor – Avidin Fusion Protein, Expressing Lentivirus. Mol Ther 2006. [DOI: 10.1016/j.ymthe.2006.08.898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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