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  1. Article: How the Tumor Micromilieu Modulates the Recruitment and Activation of Colorectal Cancer-Infiltrating Lymphocytes.

    Atreya, Imke / Neurath, Markus F

    Biomedicines

    2022  Volume 10, Issue 11

    Abstract: The successful treatment of advanced colorectal cancer disease still represents an insufficiently solved clinical challenge, which is further complicated by the fact that the majority of malignant colon tumors show only relatively low immunogenicity and ... ...

    Abstract The successful treatment of advanced colorectal cancer disease still represents an insufficiently solved clinical challenge, which is further complicated by the fact that the majority of malignant colon tumors show only relatively low immunogenicity and therefore have only limited responsiveness to immunotherapeutic approaches, such as, for instance, the use of checkpoint inhibitors. As it has been well established over the past two decades that the local tumor microenvironment and, in particular, the quantity, quality, and activation status of intratumoral immune cells critically influence the clinical prognosis of patients diagnosed with colorectal cancer and their individual benefits from immunotherapy, the enhancement of the intratumoral accumulation of cytolytic effector T lymphocytes and other cellular mediators of the antitumor immune response has emerged as a targeted objective. For the future identification and clinical validation of novel therapeutic target structures, it will thus be essential to further decipher the molecular mechanisms and cellular interactions in the intestinal tumor microenvironment, which are crucially involved in immune cell recruitment and activation. In this context, our review article aims at providing an overview of the key chemokines and cytokines whose presence in the tumor micromilieu relevantly modulates the numeric composition and antitumor capacity of tumor-infiltrating lymphocytes.
    Language English
    Publishing date 2022-11-15
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2720867-9
    ISSN 2227-9059
    ISSN 2227-9059
    DOI 10.3390/biomedicines10112940
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Book ; Online ; Thesis: Die Rolle der angeborenen lymphoiden Zellen in der Pathogenese von Colitis ulcerosa und Morbus Crohn

    Greif, Vicky [Verfasser] / Atreya, Imke [Akademischer Betreuer] / Atreya, Imke [Gutachter]

    2022  

    Author's details Vicky Greif ; Gutachter: Imke Atreya ; Betreuer: Imke Atreya
    Keywords Medizin, Gesundheit ; Medicine, Health
    Subject code sg610
    Language German
    Publisher Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
    Publishing place Erlangen
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

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  3. Book ; Online ; Thesis: Einfluss der kleinen Rho-GTPasen Rac1, Cdc42 und Rho-A auf die Funktion von ILC2s im Mausmodell der Papain-induzierten Lungenentzündung

    Osterziel, Richard [Verfasser] / Atreya, Imke [Akademischer Betreuer] / Atreya, Imke [Gutachter] / Wirtz, Stefan [Gutachter]

    2023  

    Author's details Richard Osterziel ; Gutachter: Imke Atreya, Stefan Wirtz ; Betreuer: Imke Atreya
    Keywords Medizin, Gesundheit ; Medicine, Health
    Subject code sg610
    Language German
    Publisher Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
    Publishing place Erlangen
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

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  4. Book ; Online ; Thesis: Die präklinische Charakterisierung der Thiopurinanaloga G-04 und G-05

    Holle, Johannes C. [Verfasser] / Atreya, Imke [Akademischer Betreuer] / Atreya, Imke [Gutachter] / Dieterich, Walburga [Gutachter]

    2023  

    Author's details Johannes C. Holle ; Gutachter: Imke Atreya, Walburga Dieterich ; Betreuer: Imke Atreya
    Keywords Medizin, Gesundheit ; Medicine, Health
    Subject code sg610
    Language German
    Publisher Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
    Publishing place Erlangen
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

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  5. Article ; Online: Functional Contribution and Targeted Migration of Group-2 Innate Lymphoid Cells in Inflammatory Lung Diseases: Being at the Right Place at the Right Time.

    Wirtz, Stefan / Schulz-Kuhnt, Anja / Neurath, Markus F / Atreya, Imke

    Frontiers in immunology

    2021  Volume 12, Page(s) 688879

    Abstract: During the last decade, group-2 innate lymphoid cells (ILC2s) have been discovered and successfully established as crucial mediators of lung allergy, airway inflammation and fibrosis, thus affecting the pathogenesis and clinical course of many ... ...

    Abstract During the last decade, group-2 innate lymphoid cells (ILC2s) have been discovered and successfully established as crucial mediators of lung allergy, airway inflammation and fibrosis, thus affecting the pathogenesis and clinical course of many respiratory diseases, like for instance asthma, cystic fibrosis and chronic rhinosinusitis. As an important regulatory component in this context, the local pulmonary milieu at inflammatory tissue sites does not only determine the activation status of lung-infiltrating ILC2s, but also influences their motility and migratory behavior. In general, many data collected in recent murine and human studies argued against the former concept of a very strict tissue residency of innate lymphoid cells (ILCs) and instead pointed to a context-dependent homing capacity of peripheral blood ILC precursors and the inflammation-dependent capacity of specific ILC subsets for interorgan trafficking. In this review article, we provide a comprehensive overview of the so far described molecular mechanisms underlying the pulmonary migration of ILC2s and thereby the numeric regulation of local ILC2 pools at inflamed or fibrotic pulmonary tissue sites and discuss their potential to serve as innovative therapeutic targets in the treatment of inflammatory lung diseases.
    MeSH term(s) Animals ; Chemotaxis, Leukocyte ; Humans ; Immunity, Innate ; Inflammation Mediators/metabolism ; Lung/immunology ; Lung/metabolism ; Lung/pathology ; Lymphocytes/immunology ; Lymphocytes/metabolism ; Phenotype ; Pneumonia/immunology ; Pneumonia/metabolism ; Pneumonia/pathology ; Signal Transduction
    Chemical Substances Inflammation Mediators
    Language English
    Publishing date 2021-06-10
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2021.688879
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Innate Lymphoid Cells as Regulators of Epithelial Integrity: Therapeutic Implications for Inflammatory Bowel Diseases.

    Schulz-Kuhnt, Anja / Neurath, Markus F / Wirtz, Stefan / Atreya, Imke

    Frontiers in medicine

    2021  Volume 8, Page(s) 656745

    Abstract: The occurrence of epithelial defects in the gut relevantly contributes to the pathogenesis of inflammatory bowel diseases (IBD), whereby the impairment of intestinal epithelial barrier integrity seems to represent a primary trigger as well as a disease ... ...

    Abstract The occurrence of epithelial defects in the gut relevantly contributes to the pathogenesis of inflammatory bowel diseases (IBD), whereby the impairment of intestinal epithelial barrier integrity seems to represent a primary trigger as well as a disease amplifying consequence of the chronic inflammatory process. Besides epithelial cell intrinsic factors, accumulated and overwhelmingly activated immune cells and their secretome have been identified as critical modulators of the pathologically altered intestinal epithelial cell (IEC) function in IBD. In this context, over the last 10 years increasing levels of attention have been paid to the group of innate lymphoid cells (ILCs). This is in particular due to a preferential location of these rather newly described innate immune cells in close proximity to mucosal barriers, their profound capacity to secrete effector cytokines and their numerical and functional alteration under chronic inflammatory conditions. Aiming on a comprehensive and updated summary of our current understanding of the bidirectional mucosal crosstalk between ILCs and IECs, this review article will in particular focus on the potential capacity of gut infiltrating type-1, type-2, and type-3 helper ILCs (ILC1s, ILC2s, and ILC3s, respectively) to impact on the survival, differentiation, and barrier function of IECs. Based on data acquired in IBD patients or in experimental models of colitis, we will discuss whether the different ILC subgroups could serve as potential therapeutic targets for maintenance of epithelial integrity and/or mucosal healing in IBD.
    Language English
    Publishing date 2021-03-30
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2775999-4
    ISSN 2296-858X
    ISSN 2296-858X
    DOI 10.3389/fmed.2021.656745
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Nr4a1-dependent non-classical monocytes are important for macrophage-mediated wound healing in the large intestine.

    Heidbreder, Karin / Sommer, Katrin / Wiendl, Maximilian / Müller, Tanja M / Atreya, Imke / Hildner, Kai / Neurath, Markus F / Zundler, Sebastian

    Frontiers in immunology

    2023  Volume 13, Page(s) 1040775

    Abstract: Introduction: Macrophages play an important role in intestinal wound healing. However, the trajectories from circulating monocytes to gut macrophages are incompletely understood.: Methods: Taking advantage of mice depleted for non-classical monocytes ...

    Abstract Introduction: Macrophages play an important role in intestinal wound healing. However, the trajectories from circulating monocytes to gut macrophages are incompletely understood.
    Methods: Taking advantage of mice depleted for non-classical monocytes due to deficiency for the transcription factor Nr4a1, we addressed the relevance of non-classical monocytes for large intestinal wound healing using flow cytometry, in vivo wound healing assays and immunofluorescence.
    Results: We show that wound healing in
    Discussion: Our data suggest that non-classical monocytes are biased towards wound healing macrophages. These insights might help to understand, how targeting monocyte recruitment to the intestine can be used to modulate intestinal macrophage functions.
    MeSH term(s) Mice ; Animals ; Monocytes ; Macrophages ; Wound Healing ; Intestine, Large ; Nuclear Receptor Subfamily 4, Group A, Member 1/genetics
    Chemical Substances Nr4a1 protein, mouse ; Nuclear Receptor Subfamily 4, Group A, Member 1
    Language English
    Publishing date 2023-01-18
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2022.1040775
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Microbiota: relevant player in thiopurine metabolisation?

    Atreya, Imke / Neurath, Markus F

    Gut

    2017  Volume 66, Issue 1, Page(s) 1–3

    Language English
    Publishing date 2017-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 80128-8
    ISSN 1468-3288 ; 0017-5749
    ISSN (online) 1468-3288
    ISSN 0017-5749
    DOI 10.1136/gutjnl-2016-312450
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Blocking GPR15 counteracts integrin-dependent T cell gut homing in vivo.

    Schramm, Sebastian / Liu, Li-Juan / Saad, Marek / Dietz, Lisa / Dedden, Mark / Müller, Tanja M / Atreya, Imke / Voskens, Caroline J / Atreya, Raja / Neurath, Markus F / Zundler, Sebastian

    Journal of Crohn's & colitis

    2024  

    Abstract: Background and aims: The G protein coupled receptor GPR15 is expressed on and functionally important for T cells homing to the large intestine. However, the precise mechanisms by which GPR15 controls gut homing have been unclear. Thus, we aimed to ... ...

    Abstract Background and aims: The G protein coupled receptor GPR15 is expressed on and functionally important for T cells homing to the large intestine. However, the precise mechanisms by which GPR15 controls gut homing have been unclear. Thus, we aimed to elucidate these mechanisms as well as to explore the potential of targeting GPR15 for interfering with T cell recruitment to the colon in IBD.
    Methods: We used dynamic adhesion and transmigration assays as well as a humanized in vivo model of intestinal cell trafficking to study GPR15-dependent effects on gut homing. Moreover, we analysed GPR15 and integrin expression in patients with and without IBD cross-sectionally and longitudinally.
    Results: GPR15 controlled T cell adhesion to MAdCAM-1 and VCAM-1 upstream of α4β7 and α4β1 integrin, respectively. Consistently, high co-expression of these integrins with GPR15 was found on T cells from patients with IBD and GPR15 also promoted T cell recruitment to the colon in humanized mice. Anti-GPR15 antibodies effectively blocked T cell gut homing in vitro and in vivo. In vitro data as well as observations in a cohort of patients treated with vedolizumab suggest that this might be more effective than inhibiting α4β7.
    Conclusions: GPR15 seems to have a broad, but organ-selective impact on T cell trafficking and is therefore a promising target for future therapy of IBD. Further studies are needed.
    Language English
    Publishing date 2024-01-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 2390120-2
    ISSN 1876-4479 ; 1873-9946
    ISSN (online) 1876-4479
    ISSN 1873-9946
    DOI 10.1093/ecco-jcc/jjae012
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Innate lymphoid cells in intestinal cancer development.

    Atreya, Imke / Kindermann, Markus / Wirtz, Stefan

    Seminars in immunology

    2019  Volume 41, Page(s) 101267

    Abstract: Colorectal cancer (CRC) is a highly prominent cause of cancer-related deaths worldwide. Although the functions of immune cells in the colorectal tumor microenvironment are complex and heterogeneous, dysregulated changes in the composition and activation ... ...

    Abstract Colorectal cancer (CRC) is a highly prominent cause of cancer-related deaths worldwide. Although the functions of immune cells in the colorectal tumor microenvironment are complex and heterogeneous, dysregulated changes in the composition and activation state of immune cells are believed to represent key events supporting the establishment of pro- or anti-tumorigenic immune states. Recently, innate lymphoid cells (ILCs) emerged as central innate immune mediators during both gastrointestinal homeostasis and inflammatory pathologies. Hence, ILCs might also represent promising targets in the context of cancer therapy and are increasingly recognized as innate immune cells with potent immunomodulatory properties. In this review, we summarize the pleiotropic roles of the different ILC subsets for intestinal homeostasis and discuss the recent evidence on their potential involvement in the development and growth of intestinal cancers.
    MeSH term(s) Animals ; Biomarkers ; Disease Susceptibility ; Humans ; Immunity, Innate ; Immunity, Mucosal ; Intestinal Neoplasms/etiology ; Intestinal Neoplasms/metabolism ; Intestinal Neoplasms/pathology ; Lymphocyte Subsets/immunology ; Lymphocyte Subsets/metabolism ; Lymphocytes/immunology ; Lymphocytes/metabolism ; Tumor Microenvironment
    Chemical Substances Biomarkers
    Language English
    Publishing date 2019-02-14
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1018141-6
    ISSN 1096-3618 ; 1044-5323
    ISSN (online) 1096-3618
    ISSN 1044-5323
    DOI 10.1016/j.smim.2019.02.001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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