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  1. Article ; Online: The virome in allergy and asthma: A nascent, ineffable player.

    Mageiros, Leonardos / Megremis, Spyridon / Papadopoulos, Nikolaos G

    The Journal of allergy and clinical immunology

    2023  Volume 152, Issue 6, Page(s) 1347–1351

    Abstract: Allergic diseases can be affected by virus-host interactions and are increasingly linked with the tissue-specific microbiome. High-throughput metagenomic sequencing has offered the opportunity to study the presence of viruses as an ecologic system, ... ...

    Abstract Allergic diseases can be affected by virus-host interactions and are increasingly linked with the tissue-specific microbiome. High-throughput metagenomic sequencing has offered the opportunity to study the presence of viruses as an ecologic system, namely, the virome. Even though virome studies are technically challenging conceptually and analytically, they are already producing novel data expanding our understanding of the pathophysiologic mechanisms related to chronic inflammation and allergy. The importance of interspecies and intraspecies interactions is becoming apparent, as they can significantly, directly or indirectly, affect the host's response and antigenic state. Here, we emphasize the challenges and potential insights related to study of the virome in the context of allergy and asthma. We review the limited number of studies that have investigated the virome in these conditions, underlining the need for prospective, repeated sampling designs to unravel the virome's impact on disease development and its interplay with microbiota and immunity. The potential therapeutic use of bacteriophages, which are highly complex components of the virome, is discussed. There is clearly a need for further in-depth investigation of the virome as a system in allergic diseases.
    MeSH term(s) Humans ; Virome ; Prospective Studies ; Viruses ; Bacteriophages/genetics ; Asthma
    Language English
    Publishing date 2023-09-29
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 121011-7
    ISSN 1097-6825 ; 1085-8725 ; 0091-6749
    ISSN (online) 1097-6825 ; 1085-8725
    ISSN 0091-6749
    DOI 10.1016/j.jaci.2023.09.022
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Response to: 'Similarities and differences between severe COVID-19 pneumonia and anti-MDA-5 positive dermatomyositis associated rapidly progressive interstitial lung diseases: a challenge for the future' by Wang

    Lamb, Janine A / Megremis, Spyridon / Chinoy, Hector

    Annals of the rheumatic diseases

    2020  Volume 81, Issue 10, Page(s) e193

    MeSH term(s) Autoantibodies ; COVID-19/complications ; Dermatomyositis/complications ; Humans ; Interferon-Induced Helicase, IFIH1 ; Lung Diseases, Interstitial/etiology
    Chemical Substances Autoantibodies ; Interferon-Induced Helicase, IFIH1 (EC 3.6.4.13)
    Keywords covid19
    Language English
    Publishing date 2020-08-05
    Publishing country England
    Document type Research Support, Non-U.S. Gov't ; Letter ; Comment
    ZDB-ID 7090-7
    ISSN 1468-2060 ; 0003-4967
    ISSN (online) 1468-2060
    ISSN 0003-4967
    DOI 10.1136/annrheumdis-2020-218712
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Response to: 'Similarities and differences between severe COVID-19 pneumonia and anti-MDA-5 positive dermatomyositis associated rapidly progressive interstitial lung diseases: a challenge for the future' by Wang et al

    Lamb, Janine A / Megremis, Spyridon / Chinoy, Hector

    Ann. rheum. dis

    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #696051
    Database COVID19

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  4. Article ; Online: Response to

    Lamb, Janine A / Megremis, Spyridon / Chinoy, Hector

    Annals of the Rheumatic Diseases

    ‘Similarities and differences between severe COVID-19 pneumonia and anti-MDA-5 positive dermatomyositis associated rapidly progressive interstitial lung diseases: a challenge for the future’ by Wang et al

    2020  , Page(s) annrheumdis–2020–218712

    Keywords Immunology ; General Biochemistry, Genetics and Molecular Biology ; Immunology and Allergy ; Rheumatology ; covid19
    Language English
    Publisher BMJ
    Publishing country uk
    Document type Article ; Online
    ZDB-ID 7090-7
    ISSN 1468-2060 ; 0003-4967
    ISSN (online) 1468-2060
    ISSN 0003-4967
    DOI 10.1136/annrheumdis-2020-218712
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Respiratory virome profiles reflect antiviral immune responses.

    Rovira Rubió, Judit / Megremis, Spyridon / Pasioti, Maria / Lakoumentas, John / Constantinides, Bede / Xepapadaki, Paraskevi / Bachert, Claus / Finotto, Susetta / Jartti, Tuomas / Andreakos, Evangelos / Stanic, Barbara / Akdis, Cezmi A / Akdis, Mübeccel / Papadopoulos, Nikolaos G

    Allergy

    2023  Volume 78, Issue 5, Page(s) 1258–1268

    Abstract: Background: From early life, respiratory viruses are implicated in the development, exacerbation and persistence of respiratory conditions such as asthma. Complex dynamics between microbial communities and host immune responses shape immune maturation ... ...

    Abstract Background: From early life, respiratory viruses are implicated in the development, exacerbation and persistence of respiratory conditions such as asthma. Complex dynamics between microbial communities and host immune responses shape immune maturation and homeostasis, influencing health outcomes. We evaluated the hypothesis that the respiratory virome is linked to systemic immune responses, using peripheral blood and nasopharyngeal swab samples from preschool-age children in the PreDicta cohort.
    Methods: Peripheral blood mononuclear cells from 51 children (32 asthmatics and 19 healthy controls) participating in the 2-year multinational PreDicta cohort were cultured with bacterial (Bacterial-DNA, LPS) or viral (R848, Poly:IC, RV) stimuli. Supernatants were analysed by Luminex for the presence of 22 relevant cytokines. Virome composition was obtained using untargeted high throughput sequencing of nasopharyngeal samples. The metagenomic data were used for the characterization of virome profiles and the presence of key viral families (Picornaviridae, Anelloviridae, Siphoviridae). These were correlated to cytokine secretion patterns, identified through hierarchical clustering and principal component analysis.
    Results: High spontaneous cytokine release was associated with increased presence of Prokaryotic virome profiles and reduced presence of Eukaryotic and Anellovirus profiles. Antibacterial responses did not correlate with specific viral families or virome profile; however, low antiviral responders had more Prokaryotic and less Eukaryotic virome profiles. Anelloviruses and Anellovirus-dominated profiles were equally distributed among immune response clusters. The presence of Picornaviridae and Siphoviridae was associated with low interferon-λ responses. Asthma or allergy did not modify these correlations.
    Conclusion: Antiviral cytokine responses at a systemic level reflect the upper airway virome composition. Individuals with low innate interferon responses have higher abundance of Picornaviruses (mostly Rhinoviruses) and bacteriophages. Bacteriophages, particularly Siphoviridae, appear to be sensitive sensors of host antimicrobial capacity, while Anelloviruses are not correlated with TLR-induced immune responses.
    MeSH term(s) Child, Preschool ; Child ; Humans ; Antiviral Agents ; Virome ; Leukocytes, Mononuclear ; Asthma ; Interferons ; Immunity
    Chemical Substances Antiviral Agents ; Interferons (9008-11-1)
    Language English
    Publishing date 2023-01-17
    Publishing country Denmark
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 391933-x
    ISSN 1398-9995 ; 0105-4538
    ISSN (online) 1398-9995
    ISSN 0105-4538
    DOI 10.1111/all.15634
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Respiratory eukaryotic virome expansion and bacteriophage deficiency characterize childhood asthma.

    Megremis, Spyridon / Constantinides, Bede / Xepapadaki, Paraskevi / Yap, Chuan Fu / Sotiropoulos, Alexandros G / Bachert, Claus / Finotto, Susetta / Jartti, Tuomas / Tapinos, Avraam / Vuorinen, Tytti / Andreakos, Evangelos / Robertson, David L / Papadopoulos, Nikolaos G

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 8319

    Abstract: Asthma development and exacerbation is linked to respiratory virus infections. There is limited information regarding the presence of viruses during non-exacerbation/infection periods. We investigated the nasopharyngeal/nasal virome during a period of ... ...

    Abstract Asthma development and exacerbation is linked to respiratory virus infections. There is limited information regarding the presence of viruses during non-exacerbation/infection periods. We investigated the nasopharyngeal/nasal virome during a period of asymptomatic state, in a subset of 21 healthy and 35 asthmatic preschool children from the Predicta cohort. Using metagenomics, we described the virome ecology and the cross-species interactions within the microbiome. The virome was dominated by eukaryotic viruses, while prokaryotic viruses (bacteriophages) were independently observed with low abundance. Rhinovirus B species consistently dominated the virome in asthma. Anelloviridae were the most abundant and rich family in both health and asthma. However, their richness and alpha diversity were increased in asthma, along with the co-occurrence of different Anellovirus genera. Bacteriophages were richer and more diverse in healthy individuals. Unsupervised clustering identified three virome profiles that were correlated to asthma severity and control and were independent of treatment, suggesting a link between the respiratory virome and asthma. Finally, we observed different cross-species ecological associations in the healthy versus the asthmatic virus-bacterial interactome, and an expanded interactome of eukaryotic viruses in asthma. Upper respiratory virome "dysbiosis" appears to be a novel feature of pre-school asthma during asymptomatic/non-infectious states and merits further investigation.
    MeSH term(s) Child ; Humans ; Child, Preschool ; Eukaryota ; Bacteriophages ; Virome ; Eukaryotic Cells ; Asthma ; Anelloviridae ; Asymptomatic Diseases
    Language English
    Publishing date 2023-05-23
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-34730-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Respiratory virome profiles reflect antiviral immune responses

    Rovira Rubió, Judit / Megremis, Spyridon / Pasioti, Maria / Lakoumentas, John / Constantinides, Bede / Xepapadaki, Paraskevi / Bachert, Claus / Finotto, Susetta / Jartti, Tuomas / Andreakos, Evangelos / Stanic, Barbara / Akdis, Cezmi A. / Akdis, Mübeccel / Papadopoulos, Nikolaos G.

    Allergy. 2023 May, v. 78, no. 5, p. 1258-1268

    2023  , Page(s) 1258–1268

    Abstract: BACKGROUND: From early life, respiratory viruses are implicated in the development, exacerbation and persistence of respiratory conditions such as asthma. Complex dynamics between microbial communities and host immune responses shape immune maturation ... ...

    Abstract BACKGROUND: From early life, respiratory viruses are implicated in the development, exacerbation and persistence of respiratory conditions such as asthma. Complex dynamics between microbial communities and host immune responses shape immune maturation and homeostasis, influencing health outcomes. We evaluated the hypothesis that the respiratory virome is linked to systemic immune responses, using peripheral blood and nasopharyngeal swab samples from preschool‐age children in the PreDicta cohort. METHODS: Peripheral blood mononuclear cells from 51 children (32 asthmatics and 19 healthy controls) participating in the 2‐year multinational PreDicta cohort were cultured with bacterial (Bacterial‐DNA, LPS) or viral (R848, Poly:IC, RV) stimuli. Supernatants were analysed by Luminex for the presence of 22 relevant cytokines. Virome composition was obtained using untargeted high throughput sequencing of nasopharyngeal samples. The metagenomic data were used for the characterization of virome profiles and the presence of key viral families (Picornaviridae, Anelloviridae, Siphoviridae). These were correlated to cytokine secretion patterns, identified through hierarchical clustering and principal component analysis. RESULTS: High spontaneous cytokine release was associated with increased presence of Prokaryotic virome profiles and reduced presence of Eukaryotic and Anellovirus profiles. Antibacterial responses did not correlate with specific viral families or virome profile; however, low antiviral responders had more Prokaryotic and less Eukaryotic virome profiles. Anelloviruses and Anellovirus‐dominated profiles were equally distributed among immune response clusters. The presence of Picornaviridae and Siphoviridae was associated with low interferon‐λ responses. Asthma or allergy did not modify these correlations. CONCLUSION: Antiviral cytokine responses at a systemic level reflect the upper airway virome composition. Individuals with low innate interferon responses have higher abundance of Picornaviruses (mostly Rhinoviruses) and bacteriophages. Bacteriophages, particularly Siphoviridae, appear to be sensitive sensors of host antimicrobial capacity, while Anelloviruses are not correlated with TLR‐induced immune responses.
    Keywords Anelloviridae ; Enterovirus ; Siphoviridae ; asthma ; blood ; cytokines ; homeostasis ; immune response ; interferons ; metagenomics ; principal component analysis ; secretion
    Language English
    Dates of publication 2023-05
    Size p. 1258-1268
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 391933-x
    ISSN 1398-9995 ; 0105-4538
    ISSN (online) 1398-9995
    ISSN 0105-4538
    DOI 10.1111/all.15634
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Development of an

    Tzani-Tzanopoulou, Panagiota / Rozumbetov, Ramazan / Taka, Styliani / Doudoulakakis, Anastassios / Lebessi, Evangelia / Chanishvili, Nina / Kakabadze, Elene / Bakuradze, Nata / Grdzelishvili, Nino / Goderdzishvili, Marina / Legaki, Evangelia / Andreakos, Evangelos / Papadaki, Maria / Megremis, Spyridon / Xepapadaki, Paraskevi / Kaltsas, Grigoris / Akdis, Cezmi A / Papadopoulos, Nikolaos G

    The Journal of general virology

    2023  Volume 103, Issue 12

    Abstract: Bacteriophages represent the most extensive group of viruses within the human virome and have a significant impact on general health and well-being by regulating bacterial population dynamics. ...

    Abstract Bacteriophages represent the most extensive group of viruses within the human virome and have a significant impact on general health and well-being by regulating bacterial population dynamics.
    MeSH term(s) Humans ; Bacteriophages ; Cell Survival ; Staphylococcus aureus/physiology ; Time-Lapse Imaging ; Inflammation ; Epithelial Cells/metabolism ; Cells, Cultured
    Language English
    Publishing date 2023-02-07
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 219316-4
    ISSN 1465-2099 ; 0022-1317
    ISSN (online) 1465-2099
    ISSN 0022-1317
    DOI 10.1099/jgv.0.001819
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Corrigendum: Interactions of Bacteriophages and Bacteria at the Airway Mucosa: New Insights Into the Pathophysiology of Asthma.

    Tzani-Tzanopoulou, Panagiota / Skliros, Dimitrios / Megremis, Spyridon / Xepapadaki, Paraskevi / Andreakos, Evangelos / Chanishvili, Nina / Flemetakis, Emmanouil / Kaltsas, Grigoris / Taka, Styliani / Lebessi, Evangelia / Doudoulakakis, Anastassios / Papadopoulos, Nikolaos G

    Frontiers in allergy

    2022  Volume 3, Page(s) 892908

    Abstract: This corrects the article DOI: 10.3389/falgy.2020.617240.]. ...

    Abstract [This corrects the article DOI: 10.3389/falgy.2020.617240.].
    Language English
    Publishing date 2022-04-01
    Publishing country Switzerland
    Document type Published Erratum
    ISSN 2673-6101
    ISSN (online) 2673-6101
    DOI 10.3389/falgy.2022.892908
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Effects of cryopreservation on antiviral responses of primary airway epithelial cells.

    Taka, Styliani / Nikopoulou, Chrysa / Polyzos, Alexandros / Megremis, Spyridon / Skevaki, Chrysanthi L / Roumpedaki, Eirini / Trochoutsou, Aikaterini / Thanos, Dimitris / Papadopoulos, Nikolaos G

    Allergy

    2020  Volume 75, Issue 6, Page(s) 1486–1489

    MeSH term(s) Antiviral Agents ; Cells, Cultured ; Cryopreservation ; Epithelial Cells ; Respiratory System ; Rhinovirus
    Chemical Substances Antiviral Agents
    Language English
    Publishing date 2020-02-08
    Publishing country Denmark
    Document type Letter ; Research Support, Non-U.S. Gov't
    ZDB-ID 391933-x
    ISSN 1398-9995 ; 0105-4538
    ISSN (online) 1398-9995
    ISSN 0105-4538
    DOI 10.1111/all.14163
    Database MEDical Literature Analysis and Retrieval System OnLINE

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