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  1. Article ; Online: Circulating T

    Bettelli, Estelle / Campbell, Daniel J

    Nature immunology

    2020  Volume 21, Issue 10, Page(s) 1141–1142

    MeSH term(s) Diabetes Mellitus, Type 1 ; Humans ; Receptors, CXCR5 ; T Follicular Helper Cells ; T-Lymphocytes, Helper-Inducer
    Chemical Substances Receptors, CXCR5
    Language English
    Publishing date 2020-09-02
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 2016987-5
    ISSN 1529-2916 ; 1529-2908
    ISSN (online) 1529-2916
    ISSN 1529-2908
    DOI 10.1038/s41590-020-0766-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: STAT1 signaling protects self-reactive T cells from control by innate cells during neuroinflammation.

    Arbelaez, Carlos A / Palle, Pushpalatha / Charaix, Jonathan / Bettelli, Estelle

    JCI insight

    2022  Volume 7, Issue 12

    Abstract: The transcription factor STAT1 plays a critical role in modulating the differentiation of CD4+ T cells producing IL-17 and GM-CSF, which promote the development of experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis (MS) ...

    Abstract The transcription factor STAT1 plays a critical role in modulating the differentiation of CD4+ T cells producing IL-17 and GM-CSF, which promote the development of experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis (MS). The protective role of STAT1 in MS and EAE has been largely attributed to its ability to limit pathogenic Th cells and promote Tregs. Using mice with selective deletion of STAT1 in T cells (STAT1CD4-Cre), we identified a potentially novel mechanism by which STAT1 regulates neuroinflammation independently of Foxp3+ Tregs. STAT1-deficient effector T cells became the target of NK cell-mediated killing, limiting their capacity to induce EAE. STAT1-deficient T cells promoted their own killing by producing more IL-2 that, in return, activated NK cells. Elimination of NK cells restored EAE susceptibility in STAT1CD4-Cre mice. Therefore, our study suggests that the STAT1 pathway can be manipulated to limit autoreactive T cells during autoimmunity directed against the CNS.
    MeSH term(s) Animals ; Autoimmunity ; CD4-Positive T-Lymphocytes ; Encephalomyelitis, Autoimmune, Experimental ; Mice ; Multiple Sclerosis ; Neuroinflammatory Diseases ; STAT1 Transcription Factor/genetics ; STAT1 Transcription Factor/metabolism
    Chemical Substances STAT1 Transcription Factor ; Stat1 protein, mouse
    Language English
    Publishing date 2022-06-22
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ISSN 2379-3708
    ISSN (online) 2379-3708
    DOI 10.1172/jci.insight.148222
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Regulation of lymphocyte trafficking in central nervous system autoimmunity.

    Oukka, Mohamed / Bettelli, Estelle

    Current opinion in immunology

    2018  Volume 55, Page(s) 38–43

    Abstract: ... ...

    Abstract CD4
    MeSH term(s) Animals ; Autoimmunity/immunology ; CD4-Positive T-Lymphocytes/immunology ; Central Nervous System/immunology ; Humans
    Language English
    Publishing date 2018-09-27
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Review
    ZDB-ID 1035767-1
    ISSN 1879-0372 ; 0952-7915
    ISSN (online) 1879-0372
    ISSN 0952-7915
    DOI 10.1016/j.coi.2018.09.008
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: STAT1 signaling protects self-reactive T cells from control by innate cells during neuroinflammation

    Carlos A. Arbelaez / Pushpalatha Palle / Jonathan Charaix / Estelle Bettelli

    JCI Insight, Vol 7, Iss

    2022  Volume 12

    Abstract: The transcription factor STAT1 plays a critical role in modulating the differentiation of CD4+ T cells producing IL-17 and GM-CSF, which promote the development of experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis (MS) ...

    Abstract The transcription factor STAT1 plays a critical role in modulating the differentiation of CD4+ T cells producing IL-17 and GM-CSF, which promote the development of experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis (MS). The protective role of STAT1 in MS and EAE has been largely attributed to its ability to limit pathogenic Th cells and promote Tregs. Using mice with selective deletion of STAT1 in T cells (STAT1CD4-Cre), we identified a potentially novel mechanism by which STAT1 regulates neuroinflammation independently of Foxp3+ Tregs. STAT1-deficient effector T cells became the target of NK cell–mediated killing, limiting their capacity to induce EAE. STAT1-deficient T cells promoted their own killing by producing more IL-2 that, in return, activated NK cells. Elimination of NK cells restored EAE susceptibility in STAT1CD4-Cre mice. Therefore, our study suggests that the STAT1 pathway can be manipulated to limit autoreactive T cells during autoimmunity directed against the CNS.
    Keywords Autoimmunity ; Medicine ; R
    Subject code 570
    Language English
    Publishing date 2022-06-01T00:00:00Z
    Publisher American Society for Clinical investigation
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Experimental Autoimmune Encephalomyelitis (EAE) as Animal Models of Multiple Sclerosis (MS).

    Glatigny, Simon / Bettelli, Estelle

    Cold Spring Harbor perspectives in medicine

    2018  Volume 8, Issue 11

    Abstract: Multiple sclerosis (MS) is a multifocal demyelinating disease of the central nervous system (CNS) leading to the progressive destruction of the myelin sheath surrounding axons. It can present with variable clinical and pathological manifestations, which ... ...

    Abstract Multiple sclerosis (MS) is a multifocal demyelinating disease of the central nervous system (CNS) leading to the progressive destruction of the myelin sheath surrounding axons. It can present with variable clinical and pathological manifestations, which might reflect the involvement of distinct pathogenic processes. Although the mechanisms leading to the development of the disease are not fully understood, numerous evidences indicate that MS is an autoimmune disease, the initiation and progression of which are dependent on an autoimmune response against myelin antigens. In addition, genetic susceptibility and environmental triggers likely contribute to the initiation of the disease. At this time, there is no cure for MS, but several disease-modifying therapies (DMTs) are available to control and slow down disease progression. A good number of these DMTs were identified and tested using animal models of MS referred to as experimental autoimmune encephalomyelitis (EAE). In this review, we will recapitulate the characteristics of EAE models and discuss how they help shed light on MS pathogenesis and help test new treatments for MS patients.
    MeSH term(s) Animals ; Antigens/immunology ; B-Lymphocytes/physiology ; CD4-Positive T-Lymphocytes/physiology ; CD8-Positive T-Lymphocytes/physiology ; Encephalomyelitis, Autoimmune, Experimental/immunology ; Encephalomyelitis, Autoimmune, Experimental/physiopathology ; Humans ; Multiple Sclerosis/immunology ; Multiple Sclerosis/physiopathology ; Myelin Basic Protein/physiology ; Myelin Proteolipid Protein/physiology ; Myelin-Oligodendrocyte Glycoprotein/physiology
    Chemical Substances Antigens ; Myelin Basic Protein ; Myelin Proteolipid Protein ; Myelin-Oligodendrocyte Glycoprotein
    Language English
    Publishing date 2018-11-01
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 2157-1422
    ISSN (online) 2157-1422
    DOI 10.1101/cshperspect.a028977
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Correction: Cutting Edge: Integrin α

    Glatigny, Simon / Wagner, Catriona A / Bettelli, Estelle

    Journal of immunology (Baltimore, Md. : 1950)

    2017  Volume 198, Issue 9, Page(s) 3756

    Language English
    Publishing date 2017-04-05
    Publishing country United States
    Document type Journal Article ; Published Erratum
    ZDB-ID 3056-9
    ISSN 1550-6606 ; 0022-1767 ; 1048-3233 ; 1047-7381
    ISSN (online) 1550-6606
    ISSN 0022-1767 ; 1048-3233 ; 1047-7381
    DOI 10.4049/jimmunol.1700283
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Cutting Edge: DOCK8 Regulates a Subset of Dendritic Cells That Is Critical for the Development of Experimental Autoimmune Encephalomyelitis.

    Weliwitigoda, Asanga / Palle, Pushpalatha / Gessner, Melissa / Hubbard, Nicholas W / Oukka, Mohamed / Bettelli, Estelle

    Journal of immunology (Baltimore, Md. : 1950)

    2021  Volume 207, Issue 10, Page(s) 2417–2422

    Abstract: Dedicator of cytokinesis 8 (DOCK8) is a guanine nucleotide exchange factor with an essential role in cytoskeletal rearrangement, cell migration, and survival of various immune cells. Interestingly, DOCK8-deficient mice are resistant to the development of ...

    Abstract Dedicator of cytokinesis 8 (DOCK8) is a guanine nucleotide exchange factor with an essential role in cytoskeletal rearrangement, cell migration, and survival of various immune cells. Interestingly, DOCK8-deficient mice are resistant to the development of experimental autoimmune encephalomyelitis (EAE). To understand if EAE resistance in these mice results from an alteration in dendritic cell (DC) functions, we generated mice with conditional deletion of DOCK8 in DCs and observed attenuated EAE in these mice compared with control mice. Additionally, we demonstrated that DOCK8 is important for the existence of splenic conventional DC2 and lymph node migratory DCs and further established that migratory DC, rather than resident DC, are essential for the generation and proliferation of pathogenic T cell populations upon immunization with myelin Ag in adjuvant. Therefore, our data suggest that limiting migratory DCs through DOCK8 deletion and possibly other mechanisms could limit the development of CNS autoimmunity.
    MeSH term(s) Animals ; Dendritic Cells/immunology ; Encephalomyelitis, Autoimmune, Experimental/immunology ; Female ; Guanine Nucleotide Exchange Factors/immunology ; Male ; Mice ; Mice, Inbred C57BL
    Chemical Substances Dock8 protein, mouse ; Guanine Nucleotide Exchange Factors
    Language English
    Publishing date 2021-10-18
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 3056-9
    ISSN 1550-6606 ; 0022-1767 ; 1048-3233 ; 1047-7381
    ISSN (online) 1550-6606
    ISSN 0022-1767 ; 1048-3233 ; 1047-7381
    DOI 10.4049/jimmunol.2001294
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Diminished responses to mRNA-based SARS-CoV-2 vaccines in individuals with rheumatoid arthritis on immune-modifying therapies.

    Klebanoff, Samuel D / Rodda, Lauren B / Morishima, Chihiro / Wener, Mark H / Yuzefpolskiy, Yevgeniy / Bettelli, Estelle / Buckner, Jane H / Speake, Cate / Pepper, Marion / Campbell, Daniel J

    JCI insight

    2023  Volume 8, Issue 15

    Abstract: Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disorder that causes debilitating swelling and destruction of the joints. People with RA are treated with drugs that actively suppress one or more parts of their immune system, and these may ... ...

    Abstract Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disorder that causes debilitating swelling and destruction of the joints. People with RA are treated with drugs that actively suppress one or more parts of their immune system, and these may alter the response to vaccination against SARS-CoV-2. In this study, we analyzed blood samples from a cohort of patients with RA after receiving a 2-dose mRNA COVID-19 vaccine regimen. Our data show that individuals on the cytotoxic T lymphocyte antigen 4-Ig therapy abatacept had reduced levels of SARS-CoV-2-neutralizing antibodies after vaccination. At the cellular level, these patients showed reduced activation and class switching of SARS-CoV-2-specific B cells, as well as reduced numbers and impaired helper cytokine production by SARS-CoV-2-specific CD4+ T cells. Individuals on methotrexate showed similar but less severe defects in vaccine response, whereas individuals on the B cell-depleting therapy rituximab had a near-total loss of antibody production after vaccination. These data define a specific cellular phenotype associated with impaired response to SARS-CoV-2 vaccination in patients with RA on different immune-modifying therapies and help inform efforts to improve vaccination strategies in this vulnerable population.
    MeSH term(s) Humans ; COVID-19 Vaccines ; COVID-19/prevention & control ; SARS-CoV-2 ; Arthritis, Rheumatoid/drug therapy ; Antibodies, Viral ; RNA, Messenger
    Chemical Substances COVID-19 Vaccines ; Antibodies, Viral ; RNA, Messenger
    Language English
    Publishing date 2023-08-08
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ISSN 2379-3708
    ISSN (online) 2379-3708
    DOI 10.1172/jci.insight.168663
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Building different mouse models for human MS.

    Bettelli, Estelle

    Annals of the New York Academy of Sciences

    2007  Volume 1103, Page(s) 11–18

    Abstract: Multiple sclerosis (MS) is a clinically and pathologically heterogeneous inflammatory/demyelinating disease of the central nervous system (CNS). Many patients first present with isolated optic neuritis. In some variants of MS, like Devic's disease or ... ...

    Abstract Multiple sclerosis (MS) is a clinically and pathologically heterogeneous inflammatory/demyelinating disease of the central nervous system (CNS). Many patients first present with isolated optic neuritis. In some variants of MS, like Devic's disease or neuromyelitis optica (NMO), lesions are predominantly found in the optic nerves and spinal cord but not in the brain. The immunological bases of the different forms of MS are unknown. Here, we summarize our published findings on two mouse models: 2D2 myelin oligodendrocyte glycoprotein (MOG)-specific T cell receptor (TCR) transgenic mice, which develop spontaneous isolated optic neuritis, and 2D2 mice crossed with MOG-specific IgH knockin (TH) mice, which spontaneously develop a severe form of experimental autoimmune encephalomyelitis (EAE) with a selective distribution of meningeal and parenchymal inflammatory lesions in the spinal cord and optic nerves similar to that found in human Devic's disease.
    MeSH term(s) Animals ; Disease Models, Animal ; Encephalomyelitis, Autoimmune, Experimental/immunology ; Encephalomyelitis, Autoimmune, Experimental/physiopathology ; Humans ; Mice ; Multiple Sclerosis/immunology ; Multiple Sclerosis/physiopathology ; Optic Neuritis/physiopathology
    Language English
    Publishing date 2007-04
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 211003-9
    ISSN 1749-6632 ; 0077-8923
    ISSN (online) 1749-6632
    ISSN 0077-8923
    DOI 10.1196/annals.1394.021
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Diminished responses to mRNA-based SARS-CoV-2 vaccines in individuals with rheumatoid arthritis on immune-modifying therapies

    Samuel D. Klebanoff / Lauren B. Rodda / Chihiro Morishima / Mark H. Wener / Yevgeniy Yuzefpolskiy / Estelle Bettelli / Jane H. Buckner / Cate Speake / Marion Pepper / Daniel J. Campbell

    JCI Insight, Vol 8, Iss

    2023  Volume 15

    Abstract: Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disorder that causes debilitating swelling and destruction of the joints. People with RA are treated with drugs that actively suppress one or more parts of their immune system, and these may ... ...

    Abstract Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disorder that causes debilitating swelling and destruction of the joints. People with RA are treated with drugs that actively suppress one or more parts of their immune system, and these may alter the response to vaccination against SARS-CoV-2. In this study, we analyzed blood samples from a cohort of patients with RA after receiving a 2-dose mRNA COVID-19 vaccine regimen. Our data show that individuals on the cytotoxic T lymphocyte antigen 4–Ig therapy abatacept had reduced levels of SARS-CoV-2–neutralizing antibodies after vaccination. At the cellular level, these patients showed reduced activation and class switching of SARS-CoV-2–specific B cells, as well as reduced numbers and impaired helper cytokine production by SARS-CoV-2–specific CD4+ T cells. Individuals on methotrexate showed similar but less severe defects in vaccine response, whereas individuals on the B cell–depleting therapy rituximab had a near-total loss of antibody production after vaccination. These data define a specific cellular phenotype associated with impaired response to SARS-CoV-2 vaccination in patients with RA on different immune-modifying therapies and help inform efforts to improve vaccination strategies in this vulnerable population.
    Keywords Autoimmunity ; Vaccines ; Medicine ; R
    Subject code 610
    Language English
    Publishing date 2023-08-01T00:00:00Z
    Publisher American Society for Clinical investigation
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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