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  1. Article ; Online: Cutting Edge: Hypoxia Sensing by the Histone Demethylase UTX (KDM6A) Limits Colitogenic CD4+ T Cells in Mucosal Inflammation.

    Cheng, Mandy I / Hong, Lee / Bustillos, Christian / Chen, Bryan / Chin, Scott / Luthers, Christopher R / Vo, Au / Sheikh, Shehzad Z / Su, Maureen A

    Journal of immunology (Baltimore, Md. : 1950)

    2024  Volume 212, Issue 7, Page(s) 1069–1074

    Abstract: Hypoxia is a hallmark of inflammatory conditions (e.g., inflammatory bowel disease [IBD]), and adaptive responses have consequently evolved to protect against hypoxia-associated tissue injury. Because augmenting hypoxia-induced protective responses is a ... ...

    Abstract Hypoxia is a hallmark of inflammatory conditions (e.g., inflammatory bowel disease [IBD]), and adaptive responses have consequently evolved to protect against hypoxia-associated tissue injury. Because augmenting hypoxia-induced protective responses is a promising therapeutic approach for IBD, a more complete understanding of these pathways is needed. Recent work has demonstrated that the histone demethylase UTX is oxygen-sensitive, but its role in IBD is unclear. In this study, we show that hypoxia-induced deactivation of UTX downregulates T cell responses in mucosal inflammation. Hypoxia results in decreased T cell proinflammatory cytokine production and increased immunosuppressive regulatory T cells, and these findings are recapitulated by UTX deficiency. Hypoxia leads to T cell accumulation of H3K27me3 histone modifications, suggesting that hypoxia impairs UTX's histone demethylase activity to dampen T cell colitogenic activity. Finally, T cell-specific UTX deletion ameliorates colonic inflammation in an IBD mouse model, implicating UTX's oxygen-sensitive demethylase activity in counteracting hypoxic inflammation.
    MeSH term(s) Mice ; Animals ; CD4-Positive T-Lymphocytes/metabolism ; Histone Demethylases/metabolism ; Oxygen ; Hypoxia ; Inflammation ; Inflammatory Bowel Diseases
    Chemical Substances Histone Demethylases (EC 1.14.11.-) ; Oxygen (S88TT14065)
    Language English
    Publishing date 2024-02-14
    Publishing country United States
    Document type Journal Article
    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.2300550
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Sex Differences in Immunity.

    Wilkinson, Nicole M / Chen, Ho-Chung / Lechner, Melissa G / Su, Maureen A

    Annual review of immunology

    2022  Volume 40, Page(s) 75–94

    Abstract: Strong epidemiological evidence now exists that sex is an important biologic variable in immunity. Recent studies, for example, have revealed that sex differences are associated with the severity of symptoms and mortality due to coronavirus disease 2019 ( ...

    Abstract Strong epidemiological evidence now exists that sex is an important biologic variable in immunity. Recent studies, for example, have revealed that sex differences are associated with the severity of symptoms and mortality due to coronavirus disease 2019 (COVID-19). Despite this evidence, much remains to be learned about the mechanisms underlying associations between sex differences and immune-mediated conditions. A growing body of experimental data has made significant inroads into understanding sex-influenced immune responses. As physicians seek to provide more targeted patient care, it is critical to understand how sex-defining factors (e.g., chromosomes, gonadal hormones) alter immune responses in health and disease. In this review, we highlight recent insights into sex differences in autoimmunity; virus infection, specifically severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection; and cancer immunotherapy. A deeper understanding of underlying mechanisms will allow the development of a sex-based approach to disease screening and treatment.
    MeSH term(s) Animals ; COVID-19 ; Female ; Humans ; Male ; SARS-CoV-2 ; Sex Characteristics ; Sex Factors
    Language English
    Publishing date 2022-01-05
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 604953-9
    ISSN 1545-3278 ; 0732-0582
    ISSN (online) 1545-3278
    ISSN 0732-0582
    DOI 10.1146/annurev-immunol-101320-125133
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: An Inconvenient Variable: Sex Hormones and Their Impact on T Cell Responses.

    Brown, Melissa A / Su, Maureen A

    Journal of immunology (Baltimore, Md. : 1950)

    2019  Volume 202, Issue 7, Page(s) 1927–1933

    Abstract: Epidemiologic data demonstrate sex differences in autoimmune diseases, immune responses against infection, and antitumor immunity, and accumulating evidence suggests a major role for sex hormones in mediating these differences. In this study, we review ... ...

    Abstract Epidemiologic data demonstrate sex differences in autoimmune diseases, immune responses against infection, and antitumor immunity, and accumulating evidence suggests a major role for sex hormones in mediating these differences. In this study, we review recent advances in understanding how sex hormones regulate T cell responses to alter susceptibility to autoimmunity. Although sex hormones can directly alter gene transcriptional programs of T cells, we focus in this study on how sex hormones alter T cell development and function through their effects on thymic stromal cells and innate cell types. In addition to contributing to our understanding of sex differences, these findings also have implications for the therapeutic use of sex hormones and sex hormone modulators, which are now being prescribed to increasing numbers of patients for a wide variety of indications.
    MeSH term(s) Animals ; Autoimmune Diseases/immunology ; Autoimmunity/immunology ; Female ; Gonadal Steroid Hormones/immunology ; Humans ; Male ; Sex Characteristics ; T-Lymphocytes/immunology
    Chemical Substances Gonadal Steroid Hormones
    Language English
    Publishing date 2019-03-18
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
    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.1801403
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Pulling RANK on Cancer: Blocking Aire-Mediated Central Tolerance to Enhance Immunotherapy.

    Su, Maureen A / Anderson, Mark S

    Cancer immunology research

    2019  Volume 7, Issue 6, Page(s) 854–859

    Abstract: A major breakthrough in cancer treatment occurred with the development of strategies that overcome T-cell tolerance toward tumor cells. These approaches enhance antitumor immunity by overcoming mechanisms that are normally in place to prevent ... ...

    Abstract A major breakthrough in cancer treatment occurred with the development of strategies that overcome T-cell tolerance toward tumor cells. These approaches enhance antitumor immunity by overcoming mechanisms that are normally in place to prevent autoimmunity but simultaneously prevent rejection of tumor cells. Although tolerance mechanisms that restrict antitumor immunity take place both in the thymus and periphery, only immunotherapies that target peripheral tolerance mechanisms occurring outside of the thymus are currently available. We review here recent gains in our understanding of how thymic tolerance mediated by the a
    MeSH term(s) Animals ; Autoimmune Diseases/etiology ; Autoimmune Diseases/metabolism ; Autoimmunity/genetics ; Central Tolerance/genetics ; Central Tolerance/immunology ; Clonal Deletion/genetics ; Clonal Deletion/immunology ; Humans ; Immunomodulation ; Immunotherapy ; Molecular Targeted Therapy ; Neoplasms/etiology ; Neoplasms/metabolism ; Neoplasms/pathology ; Neoplasms/therapy ; Organ Specificity/genetics ; Organ Specificity/immunology ; RANK Ligand/antagonists & inhibitors ; RANK Ligand/metabolism ; Receptor Activator of Nuclear Factor-kappa B/metabolism ; T-Lymphocytes/immunology ; T-Lymphocytes/metabolism ; T-Lymphocytes, Regulatory/immunology ; T-Lymphocytes, Regulatory/metabolism ; Thymus Gland/immunology ; Thymus Gland/metabolism ; Transcription Factors/genetics ; Transcription Factors/metabolism ; AIRE Protein
    Chemical Substances RANK Ligand ; Receptor Activator of Nuclear Factor-kappa B ; TNFRSF11A protein, human ; Transcription Factors
    Language English
    Publishing date 2019-06-03
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2732489-8
    ISSN 2326-6074 ; 2326-6066
    ISSN (online) 2326-6074
    ISSN 2326-6066
    DOI 10.1158/2326-6066.CIR-18-0912
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Hypoxia-sensing by the Histone Demethylase UTX (

    Cheng, Mandy I / Hong, Lee / Chen, Bryan / Chin, Scott / Luthers, Christopher R / Bustillos, Christian / Sheikh, Shehzad Z / Su, Maureen A

    bioRxiv : the preprint server for biology

    2023  

    Abstract: Hypoxia is a feature of inflammatory conditions [e.g., inflammatory bowel disease (IBD)] and can exacerbate tissue damage in these diseases. To counteract hypoxia's deleterious effects, adaptive responses have evolved which protect against hypoxia- ... ...

    Abstract Hypoxia is a feature of inflammatory conditions [e.g., inflammatory bowel disease (IBD)] and can exacerbate tissue damage in these diseases. To counteract hypoxia's deleterious effects, adaptive responses have evolved which protect against hypoxia-associated tissue injury. To date, much attention has focused on hypoxia-activated HIF (hypoxia-inducible factor) transcription factors in these responses. However, recent work has identified epigenetic regulators that are also oxygen-sensitive, but their role in adaptation to hypoxic inflammation is currently unclear. Here, we show that the oxygen-sensing epigenetic regulator UTX is a critical modulator of colitis severity. Unlike HIF transcription factors that act on gut epithelial cells, UTX functions in colitis through its effects on immune cells. Hypoxia results in decreased CD4
    Language English
    Publishing date 2023-07-29
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.07.27.550746
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Polyendocrine Autoimmunity and Diabetic Ketoacidosis Following Anti-PD-1 and Interferon α.

    Dasgupta, Aditi / Tsay, Eric / Federman, Noah / Lechner, Melissa G / Su, Maureen A

    Pediatrics

    2022  Volume 149, Issue 4

    Abstract: Immune checkpoint inhibitor (ICI) therapies are now first-line therapy for many advanced malignancies in adults, with emerging use in children. With increasing ICI use, prompt recognition and optimal management of ICI-associated immune-related adverse ... ...

    Abstract Immune checkpoint inhibitor (ICI) therapies are now first-line therapy for many advanced malignancies in adults, with emerging use in children. With increasing ICI use, prompt recognition and optimal management of ICI-associated immune-related adverse events (IRAEs) are critical. Nearly 60% of ICI-treated adults develop IRAEs, which commonly manifest as autoimmune skin, gastrointestinal, and endocrine disease and can be life-threatening. The incidence, presentation, and disease course of spontaneous autoimmune diseases differ between adults and children, but the pattern of pediatric IRAEs is currently unclear. We report a case of a pediatric patient presenting with new onset autoimmune diabetes mellitus and diabetic ketoacidosis during ICI treatment of fibrolamellar hepatocellular carcinoma (FLC). Distinct from spontaneous type 1 diabetes mellitus (T1DM), this patient progressed rapidly and was negative for known β cell autoantibodies. Additionally, the patient was positive for 21-hydroxylase autoantibodies, suggesting development of concomitant adrenal autoimmunity. Current guidelines for the management of IRAEs in adults may not be appropriate for the management of pediatric patients, who may have different autoimmune risks in a developmental context.
    MeSH term(s) Adult ; Autoimmune Diseases ; Autoimmunity ; Child ; Diabetes Mellitus ; Diabetic Ketoacidosis/chemically induced ; Diabetic Ketoacidosis/therapy ; Humans ; Interferon-alpha/adverse effects ; Neoplasms ; Nivolumab/adverse effects ; Polyendocrinopathies, Autoimmune
    Chemical Substances Interferon-alpha ; Nivolumab (31YO63LBSN)
    Language English
    Publishing date 2022-03-03
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 207677-9
    ISSN 1098-4275 ; 0031-4005
    ISSN (online) 1098-4275
    ISSN 0031-4005
    DOI 10.1542/peds.2021-053363
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Mild COVID-19 in an APECED Patient with Chronic Inflammatory Demyelinating Polyneuropathy (CIDP) and High Titer of Type 1 IFN-Abs: A Case Report.

    Valenzise, Mariella / Foti Randazzese, Simone / Toscano, Fabio / Lombardo, Fortunato / Salzano, Giuseppina / Pajno, Cristina / Wasniewska, Malgorzata / Cascio, Antonio / Su, Maureen A

    Pathogens (Basel, Switzerland)

    2023  Volume 12, Issue 3

    Abstract: Autoimmune-Poly-Endocrinopathy-Candidiasis-Ectodermal Dystrophy (APECED), caused by mutations in the Autoimmune Regulator (AIRE) gene, is an autosomal recessive multi-organ autoimmunity syndrome usually defined by high serum titers of type I Interferon ... ...

    Abstract Autoimmune-Poly-Endocrinopathy-Candidiasis-Ectodermal Dystrophy (APECED), caused by mutations in the Autoimmune Regulator (AIRE) gene, is an autosomal recessive multi-organ autoimmunity syndrome usually defined by high serum titers of type I Interferon Autoantibodies (Type 1 IFN-Abs). These antibodies have recently been found in individuals in the general population who develop life-threatening Coronavirus Disease 2019 (COVID-19), but the significance of pre-existing Type 1 IFN-Abs in APECED patients with COVID-19 remains unclear. Previous reports of COVID-19 outcomes in APECED patients have been divergent, and protective roles have been proposed for female sex, age <26 years, and immunomodulatory medications including intravenous immunoglobulin (IVIg). We report the case of a 30-year-old male APECED patient who experienced a Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection with mild symptoms of fatigue and headache without respiratory distress and did not require hospitalization. He received a stress dose of hydrocortisone for adrenal insufficiency and continued on his baseline medications, including subcutaneous administration of Immunoglobulins (SCIgs) for chronic inflammatory demyelinating polyneuropathy (CIDP). Mild COVID-19 in a 30-year-old male patient with APECED and pre-existing Type 1 IFN-Abs was unexpected. Younger age and management of autoimmunity may have played a role.
    Language English
    Publishing date 2023-03-02
    Publishing country Switzerland
    Document type Case Reports
    ZDB-ID 2695572-6
    ISSN 2076-0817
    ISSN 2076-0817
    DOI 10.3390/pathogens12030403
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Mild COVID-19 in an APECED Patient with Chronic Inflammatory Demyelinating Polyneuropathy (CIDP) and High Titer of Type 1 IFN-Abs

    Mariella Valenzise / Simone Foti Randazzese / Fabio Toscano / Fortunato Lombardo / Giuseppina Salzano / Cristina Pajno / Malgorzata Wasniewska / Antonio Cascio / Maureen A Su

    Pathogens, Vol 12, Iss 403, p

    A Case Report

    2023  Volume 403

    Abstract: Autoimmune-Poly-Endocrinopathy-Candidiasis-Ectodermal Dystrophy (APECED), caused by mutations in the Autoimmune Regulator (AIRE) gene, is an autosomal recessive multi-organ autoimmunity syndrome usually defined by high serum titers of type I Interferon ... ...

    Abstract Autoimmune-Poly-Endocrinopathy-Candidiasis-Ectodermal Dystrophy (APECED), caused by mutations in the Autoimmune Regulator (AIRE) gene, is an autosomal recessive multi-organ autoimmunity syndrome usually defined by high serum titers of type I Interferon Autoantibodies (Type 1 IFN-Abs). These antibodies have recently been found in individuals in the general population who develop life-threatening Coronavirus Disease 2019 (COVID-19), but the significance of pre-existing Type 1 IFN-Abs in APECED patients with COVID-19 remains unclear. Previous reports of COVID-19 outcomes in APECED patients have been divergent, and protective roles have been proposed for female sex, age <26 years, and immunomodulatory medications including intravenous immunoglobulin (IVIg). We report the case of a 30-year-old male APECED patient who experienced a Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection with mild symptoms of fatigue and headache without respiratory distress and did not require hospitalization. He received a stress dose of hydrocortisone for adrenal insufficiency and continued on his baseline medications, including subcutaneous administration of Immunoglobulins (SCIgs) for chronic inflammatory demyelinating polyneuropathy (CIDP). Mild COVID-19 in a 30-year-old male patient with APECED and pre-existing Type 1 IFN-Abs was unexpected. Younger age and management of autoimmunity may have played a role.
    Keywords APECED ; type 1 IFN-Abs ; COVID-19 ; corticosteroids ; subcutaneous immunoglobulins ; case report ; Medicine ; R
    Subject code 610
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article: A pathologically expanded, clonal lineage of IL-21 producing CD4+ T cells drives Inflammatory neuropathy.

    Seyedsadr, Maryamsadat / Bang, Madison / McCarthy, Ethan / Zhang, Shirley / Chen, Ho-Chung / Mohebbi, Mahnia / Hugo, Willy / Whitmire, Jason K / Lechner, Melissa G / Su, Maureen A

    bioRxiv : the preprint server for biology

    2024  

    Abstract: Inflammatory neuropathies, which include CIDP (chronic inflammatory demyelinating polyneuropathy) and GBS (Guillain Barre Syndrome), result from autoimmune destruction of the peripheral nervous system (PNS) and are characterized by progressive weakness ... ...

    Abstract Inflammatory neuropathies, which include CIDP (chronic inflammatory demyelinating polyneuropathy) and GBS (Guillain Barre Syndrome), result from autoimmune destruction of the peripheral nervous system (PNS) and are characterized by progressive weakness and sensory loss. CD4+ T cells play a key role in the autoimmune destruction of the PNS. Yet, key properties of pathogenic CD4+ T cells remain incompletely understood. Here, we use paired scRNAseq and scTCRseq of peripheral nerves from an inflammatory neuropathy mouse model to identify IL-21 expressing CD4+ T cells that are clonally expanded and multifunctional. These IL-21-expressing CD4+ T cells are comprised of two transcriptionally distinct expanded populations, which express genes associated with Tfh and Tph subsets. Remarkably, TCR clonotypes are shared between these two IL-21-expressing populations, suggesting a common lineage differentiation pathway. Finally, we demonstrate that IL-21 signaling is required for neuropathy development and pathogenic T cell infiltration into peripheral nerves. IL-21 signaling upregulates CXCR6, a chemokine receptor that promotes CD4+ T cell localization in peripheral nerves. Together, these findings point to IL-21 signaling, Tfh/Tph differentiation, and CXCR6-mediated cellular localization as potential therapeutic targets in inflammatory neuropathies.
    Language English
    Publishing date 2024-01-08
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2024.01.07.574553
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Estrogen turns down "the AIRE".

    Bakhru, Pearl / Su, Maureen A

    The Journal of clinical investigation

    2016  Volume 126, Issue 4, Page(s) 1239–1241

    Abstract: Genetic alterations are known drivers of autoimmune disease; however, there is a much higher incidence of autoimmunity in women, implicating sex-specific factors in disease development. The autoimmune regulator (AIRE) gene contributes to the maintenance ... ...

    Abstract Genetic alterations are known drivers of autoimmune disease; however, there is a much higher incidence of autoimmunity in women, implicating sex-specific factors in disease development. The autoimmune regulator (AIRE) gene contributes to the maintenance of central tolerance, and complete loss of AIRE function results in the development of autoimmune polyendocrinopathy syndrome type 1. In this issue of the JCI, Dragin and colleagues demonstrate that AIRE expression is downregulated in females as the result of estrogen-mediated alterations at the AIRE promoter. The association between estrogen and reduction of AIRE may at least partially account for the elevated incidence of autoimmune disease in women and has potential implications for sex hormone therapy.
    MeSH term(s) Animals ; Autoimmune Diseases/metabolism ; Estrogens/metabolism ; Female ; Gene Expression Regulation ; Humans ; Male ; Sex Characteristics ; Transcription Factors/biosynthesis
    Chemical Substances Estrogens ; Transcription Factors
    Language English
    Publishing date 2016-04-01
    Publishing country United States
    Document type Comment ; Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 3067-3
    ISSN 1558-8238 ; 0021-9738
    ISSN (online) 1558-8238
    ISSN 0021-9738
    DOI 10.1172/JCI86800
    Database MEDical Literature Analysis and Retrieval System OnLINE

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