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  1. Article ; Online: You are the tumor queen, microbiome fiend, IL-17.

    Jana, Jessica A / Overacre-Delgoffe, Abigail E

    Immunity

    2024  Volume 57, Issue 1, Page(s) 11–13

    Abstract: The role of IL-17 signaling in cancer remains convoluted due to its role in regulating the gut microbiome. In a recent issue of Cancer Cell, Chandra et al. demonstrate that microbially driven IL-17 signaling promotes tumor growth. ...

    Abstract The role of IL-17 signaling in cancer remains convoluted due to its role in regulating the gut microbiome. In a recent issue of Cancer Cell, Chandra et al. demonstrate that microbially driven IL-17 signaling promotes tumor growth.
    MeSH term(s) Humans ; Interleukin-17 ; Microbiota ; Gastrointestinal Microbiome ; Neoplasms ; Signal Transduction
    Chemical Substances Interleukin-17
    Language English
    Publishing date 2024-01-10
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 1217235-2
    ISSN 1097-4180 ; 1074-7613
    ISSN (online) 1097-4180
    ISSN 1074-7613
    DOI 10.1016/j.immuni.2023.12.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Regulation of tissue-resident memory T cells by the Microbiota.

    Overacre-Delgoffe, Abigail E / Hand, Timothy W

    Mucosal immunology

    2022  Volume 15, Issue 3, Page(s) 408–417

    Abstract: Resident memory T cells (Trms) predominantly reside within tissue and are critical for providing rapid protection against invasive viruses, fungi and bacteria. Given that tissues are heavily impacted and shaped by the microbiota, it stands to reason that ...

    Abstract Resident memory T cells (Trms) predominantly reside within tissue and are critical for providing rapid protection against invasive viruses, fungi and bacteria. Given that tissues are heavily impacted and shaped by the microbiota, it stands to reason that Trms are also influenced by the microbiota that inhabits barrier sites. The influence of the microbiota is largely mediated by microbial production of metabolites which are crucial to the immune response to both viral infection and cancerous tumors. In addition to the effects of metabolites, antigens derived from the microbiota can activate T cell responses. While microbiota-specific T cells may assist in tissue repair, control of infection and anti-tumor immunity, the actual 'memory' potential of these cells remains unclear. Here, we hypothesize that memory responses to antigens from the microbiota must be 'licensed' by inflammatory signals activated by invasion of the host by microorganisms.
    MeSH term(s) Bacteria ; Humans ; Immunity ; Memory T Cells ; Microbiota ; Neoplasms
    Language English
    Publishing date 2022-02-22
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2411370-0
    ISSN 1935-3456 ; 1933-0219
    ISSN (online) 1935-3456
    ISSN 1933-0219
    DOI 10.1038/s41385-022-00491-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Promoter IV-BDNF deficiency disturbs cholinergic gene expression of CHRNA5, CHRM2, and CHRM5: effects of drug and environmental treatments.

    Sakata, Kazuko / Overacre, Abigail E

    Journal of neurochemistry

    2017  Volume 143, Issue 1, Page(s) 49–64

    Abstract: Brain-derived neurotrophic factor (BDNF) promotes maturation of cholinergic neurons. However, how activity-dependent BDNF expression affects specific cholinergic gene expression remains unclear. This study addressed this question by determining mRNA ... ...

    Abstract Brain-derived neurotrophic factor (BDNF) promotes maturation of cholinergic neurons. However, how activity-dependent BDNF expression affects specific cholinergic gene expression remains unclear. This study addressed this question by determining mRNA levels of 22 acetylcholine receptor subunits, the choline transporter (CHT), and the choline acetyltransferase (ChAT) in mice deficient in activity-dependent BDNF via promoter IV (KIV) and control wild-type mice. Quantitative RT-PCR revealed significant reductions in nicotinic acetylcholine receptor alpha 5 (CHRNA5) in the frontal cortex and hippocampus and M5 muscarinic acetylcholine receptor (CHRM5) in the hippocampus, but significant increases in M2 muscarinic acetylcholine receptor (CHRM2) in the frontal cortex of KIV mice compared to wild-type mice. Three-week treatments with fluoxetine, phenelzine, duloxetine, imipramine, or an enriched environment treatment (EET) did not affect the altered expression of these genes except that EET increased CHRNA5 levels only in KIV frontal cortex. EET also increased levels of CHRNA7, CHT, and ChAT, again only in the KIV frontal cortex. The imipramine treatment was most prominent among the four antidepressants; it up-regulated hippocampal CHRM2 and frontal cortex CHRM5 in both genotypes, and frontal cortex CHRNA7 only in KIV mice. To the best of our knowledge, this is the first evidence that BDNF deficiency disturbs expression of CHRNA5, CHRM2, and CHRM5. Our results suggest that promoter IV-BDNF deficiency - which occurs under chronic stress - causes cholinergic dysfunctions via these receptors. EET is effective on CHRNA5, while its compensatory induction of other cholinergic genes or drugs targeting CHRNA5, CHRM2, and CHRM5 may become an alternative strategy to reverse these BDNF-linked cholinergic dysfunctions.
    MeSH term(s) Animals ; Antidepressive Agents/pharmacology ; Brain-Derived Neurotrophic Factor/deficiency ; Brain-Derived Neurotrophic Factor/genetics ; Environment ; Female ; Frontal Lobe/drug effects ; Frontal Lobe/metabolism ; Gene Expression ; Hippocampus/drug effects ; Hippocampus/metabolism ; Male ; Mice ; Mice, 129 Strain ; Mice, Inbred C57BL ; Promoter Regions, Genetic/drug effects ; Promoter Regions, Genetic/physiology ; Receptor, Muscarinic M2/biosynthesis ; Receptor, Muscarinic M2/genetics ; Receptor, Muscarinic M5/biosynthesis ; Receptor, Muscarinic M5/genetics ; Receptors, Nicotinic/biosynthesis ; Receptors, Nicotinic/genetics
    Chemical Substances Antidepressive Agents ; Brain-Derived Neurotrophic Factor ; CHRM2 protein, human ; CHRNA5 protein, mouse ; Receptor, Muscarinic M2 ; Receptor, Muscarinic M5 ; Receptors, Nicotinic
    Language English
    Publishing date 2017-08-16
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 80158-6
    ISSN 1471-4159 ; 0022-3042 ; 1474-1644
    ISSN (online) 1471-4159
    ISSN 0022-3042 ; 1474-1644
    DOI 10.1111/jnc.14129
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: T(reg) stability: to be or not to be.

    Overacre, Abigail E / Vignali, Dario Aa

    Current opinion in immunology

    2016  Volume 39, Page(s) 39–43

    Abstract: Regulatory T cell (T(reg)) stability has been primarily determined by the maintained expression of the transcription factor Forkhead box P3 (Foxp3). However, T(regs) can exhibit instability while maintaining Foxp3 expression, requiring a re-examination ... ...

    Abstract Regulatory T cell (T(reg)) stability has been primarily determined by the maintained expression of the transcription factor Forkhead box P3 (Foxp3). However, T(regs) can exhibit instability while maintaining Foxp3 expression, requiring a re-examination of what defines T(reg) stability. Recent work suggests that the establishment and stability of T(regs) is mediated by a number of mechanisms besides Foxp3 expression, such as epigenetic modifications, Foxo1/3a localization, expression of Eos and signaling via Neuropilin-1. Additional studies may help to define approaches that can undermine T(reg) stability in cancer or enhance T(reg) stability in transplantation, autoimmune or inflammatory diseases and therefore have substantial therapeutic utility. In this review, we will discuss how T(reg) stability is defined and the mechanisms utilized to maintain stability.
    MeSH term(s) Animals ; Epigenesis, Genetic ; Forkhead Transcription Factors/immunology ; Humans ; Signal Transduction ; T-Lymphocytes, Regulatory/immunology
    Chemical Substances FOXP3 protein, human ; Forkhead Transcription Factors
    Language English
    Publishing date 2016-04
    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.2015.12.009
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Treg Fragility: A Prerequisite for Effective Antitumor Immunity?

    Overacre-Delgoffe, Abigail E / Vignali, Dario A A

    Cancer immunology research

    2018  Volume 6, Issue 8, Page(s) 882–887

    Abstract: Inhibitory checkpoint blockade has significantly improved patient response rate across numerous tumor types. However, most patients remain unresponsive to immunotherapy, suggesting that unappreciated mechanisms of resistance exist. The tumor ... ...

    Abstract Inhibitory checkpoint blockade has significantly improved patient response rate across numerous tumor types. However, most patients remain unresponsive to immunotherapy, suggesting that unappreciated mechanisms of resistance exist. The tumor microenvironment (TME) is unique and composed of many suppressive cell populations that inhibit antitumor immune responses, including regulatory T cells (Tregs). The TME is nutrient poor, acidic, and hypoxic, creating a challenging microenvironment for immune cells to function and survive. Tregs suppress a wide variety of cell populations through multiple mechanisms and are tasked with limiting tissue damage. Tregs are now considered to be a barrier to effective antitumor immunity. Systemic Treg depletion is not favored because of their critical role in maintaining immune homeostasis and preventing autoimmunity. Reducing Treg function specifically within the TME may provide a more effective, targeted approach to limit the immunosuppressive environment within the tumor without inducing systemic adverse consequences. Targeting molecules that cause Treg instability, characterized by loss of critical Treg transcription factors such as Foxp3, could result in conversion into cells that cause immune pathology, tissue damage, and subsequent autoimmune side effects. Interferon-γ (IFNγ) can cause intratumoral Treg "fragility," which results in loss of suppressive activity and increased IFNγ production without loss of Foxp3 expression and gross Treg "identity." We reviewed the impact Tregs have on the TME and vice versa, and their implications for responsiveness to cancer immunotherapy. We propose that the extent to which intratumoral Tregs develop a "fragile" phenotype following immunotherapy will predict and dictate responsiveness.
    MeSH term(s) Humans ; Immunotherapy/methods ; Neoplasms/immunology ; Neoplasms/therapy ; T-Lymphocytes, Regulatory/immunology ; Tumor Escape/immunology ; Tumor Microenvironment/immunology
    Language English
    Publishing date 2018-08-02
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Review
    ZDB-ID 2732489-8
    ISSN 2326-6074 ; 2326-6066
    ISSN (online) 2326-6074
    ISSN 2326-6066
    DOI 10.1158/2326-6066.CIR-18-0066
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Microbiota-specific T follicular helper cells drive tertiary lymphoid structures and anti-tumor immunity against colorectal cancer.

    Overacre-Delgoffe, Abigail E / Bumgarner, Hannah J / Cillo, Anthony R / Burr, Ansen H P / Tometich, Justin T / Bhattacharjee, Amrita / Bruno, Tullia C / Vignali, Dario A A / Hand, Timothy W

    Immunity

    2021  Volume 54, Issue 12, Page(s) 2812–2824.e4

    Abstract: The composition of the intestinal microbiota is associated with both the development of tumors and the efficacy of anti-tumor immunity. Here, we examined the impact of microbiota-specific T cells in anti-colorectal cancer (CRC) immunity. Introduction of ... ...

    Abstract The composition of the intestinal microbiota is associated with both the development of tumors and the efficacy of anti-tumor immunity. Here, we examined the impact of microbiota-specific T cells in anti-colorectal cancer (CRC) immunity. Introduction of Helicobacter hepaticus (Hhep) in a mouse model of CRC did not alter the microbial landscape but increased tumor infiltration by cytotoxic lymphocytes and inhibited tumor growth. Anti-tumor immunity was independent of CD8
    MeSH term(s) Animals ; B-Lymphocyte Subsets/immunology ; CD4-Positive T-Lymphocytes/immunology ; Colon/pathology ; Colorectal Neoplasms/immunology ; Disease Models, Animal ; Gastrointestinal Microbiome/immunology ; Helicobacter Infections/immunology ; Helicobacter hepaticus/physiology ; Humans ; Killer Cells, Natural/immunology ; Lymphocytes, Tumor-Infiltrating/immunology ; Mice ; Proto-Oncogene Proteins c-bcl-6/genetics ; Proto-Oncogene Proteins c-bcl-6/metabolism ; T Follicular Helper Cells/immunology ; Tertiary Lymphoid Structures/immunology
    Chemical Substances Bcl6 protein, mouse ; Proto-Oncogene Proteins c-bcl-6
    Language English
    Publishing date 2021-12-02
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1217235-2
    ISSN 1097-4180 ; 1074-7613
    ISSN (online) 1097-4180
    ISSN 1074-7613
    DOI 10.1016/j.immuni.2021.11.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Environmental enteric dysfunction induces regulatory T cells that inhibit local CD4+ T cell responses and impair oral vaccine efficacy.

    Bhattacharjee, Amrita / Burr, Ansen H P / Overacre-Delgoffe, Abigail E / Tometich, Justin T / Yang, Deyi / Huckestein, Brydie R / Linehan, Jonathan L / Spencer, Sean P / Hall, Jason A / Harrison, Oliver J / Morais da Fonseca, Denise / Norton, Elizabeth B / Belkaid, Yasmine / Hand, Timothy W

    Immunity

    2021  Volume 54, Issue 8, Page(s) 1745–1757.e7

    Abstract: ... dependent mouse EED model. Analysis of E. coli-labile toxin vaccine-specific CD4 ...

    Abstract Environmental enteric dysfunction (EED) is a gastrointestinal inflammatory disease caused by malnutrition and chronic infection. EED is associated with stunting in children and reduced efficacy of oral vaccines. To study the mechanisms of oral vaccine failure during EED, we developed a microbiota- and diet-dependent mouse EED model. Analysis of E. coli-labile toxin vaccine-specific CD4
    MeSH term(s) Administration, Oral ; Animals ; Bacterial Toxins/immunology ; Cell Line ; Disease Models, Animal ; Drosophila ; Escherichia coli/immunology ; Escherichia coli Vaccines/immunology ; Female ; Forkhead Transcription Factors/metabolism ; Gastrointestinal Diseases/immunology ; Gastrointestinal Diseases/microbiology ; Gastrointestinal Diseases/pathology ; Intestine, Small/immunology ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Nuclear Receptor Subfamily 1, Group F, Member 3/metabolism ; T-Lymphocytes, Regulatory/immunology ; Vaccination
    Chemical Substances Bacterial Toxins ; Escherichia coli Vaccines ; Forkhead Transcription Factors ; Foxp3 protein, mouse ; Nuclear Receptor Subfamily 1, Group F, Member 3
    Language English
    Publishing date 2021-08-03
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, N.I.H., Intramural
    ZDB-ID 1217235-2
    ISSN 1097-4180 ; 1074-7613
    ISSN (online) 1097-4180
    ISSN 1074-7613
    DOI 10.1016/j.immuni.2021.07.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Metabolic support of tumour-infiltrating regulatory T cells by lactic acid.

    Watson, McLane J / Vignali, Paolo D A / Mullett, Steven J / Overacre-Delgoffe, Abigail E / Peralta, Ronal M / Grebinoski, Stephanie / Menk, Ashley V / Rittenhouse, Natalie L / DePeaux, Kristin / Whetstone, Ryan D / Vignali, Dario A A / Hand, Timothy W / Poholek, Amanda C / Morrison, Brett M / Rothstein, Jeffrey D / Wendell, Stacy G / Delgoffe, Greg M

    Nature

    2021  Volume 591, Issue 7851, Page(s) 645–651

    Abstract: Regulatory T ( ... ...

    Abstract Regulatory T (T
    MeSH term(s) Animals ; Cell Line, Tumor ; Cell Proliferation ; Female ; Glucose/metabolism ; Humans ; Lactic Acid/metabolism ; Lymphocytes, Tumor-Infiltrating/immunology ; Lymphocytes, Tumor-Infiltrating/metabolism ; Male ; Mice ; Neoplasms/immunology ; Suppressor Factors, Immunologic/immunology ; Suppressor Factors, Immunologic/metabolism ; T-Lymphocytes, Regulatory/immunology ; T-Lymphocytes, Regulatory/metabolism
    Chemical Substances Suppressor Factors, Immunologic ; Lactic Acid (33X04XA5AT) ; Glucose (IY9XDZ35W2)
    Language English
    Publishing date 2021-02-15
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-020-03045-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Considerations for treatment duration in responders to immune checkpoint inhibitors.

    Marron, Thomas U / Ryan, Aideen E / Reddy, Sangeetha M / Kaczanowska, Sabina / Younis, Rania H / Thakkar, Dipti / Zhang, Jiajia / Bartkowiak, Todd / Howard, Rachel / Anderson, Kristin G / Olson, Daniel / Naqash, Abdul Rafeh / Patel, Ravi B / Sachdev, Esha / Rodriguez-Ruiz, Maria E / Sheffer, Michal / Church, Sarah / Fuhrman, Christopher / Overacre-Delgoffe, Abigail /
    Nguyen, Rosa / Florou, Vaia / Thaxton, Jessica E / Aggen, David H / Guerriero, Jennifer L

    Journal for immunotherapy of cancer

    2021  Volume 9, Issue 3

    Abstract: Immune checkpoint inhibitors (ICIs) have improved overall survival for cancer patients, however, optimal duration of ICI therapy has yet to be defined. Given ICIs were first used to treat patients with metastatic melanoma, a condition that at the time ... ...

    Abstract Immune checkpoint inhibitors (ICIs) have improved overall survival for cancer patients, however, optimal duration of ICI therapy has yet to be defined. Given ICIs were first used to treat patients with metastatic melanoma, a condition that at the time was incurable, little attention was initially paid to how much therapy would be needed for a durable response. As the early immunotherapy trials have matured past 10 years, a significant per cent of patients have demonstrated durable responses; it is now time to determine whether patients have been overtreated, and if durable remissions can still be achieved with less therapy, limiting the physical and financial toxicity associated with years of treatment. Well-designed trials are needed to identify optimal duration of therapy, and to define biomarkers to predict who would benefit from shorter courses of immunotherapy. Here, we outline key questions related to health, financial and societal toxicities of over treating with ICI and present four unique clinical trials aimed at exposing criteria for early cessation of ICI. Taken together, there is a serious liability to overtreating patients with ICI and future work is warranted to determine when it is safe to stop ICI.
    MeSH term(s) Clinical Trials as Topic ; Drug Administration Schedule ; Evidence-Based Medicine ; Humans ; Immune Checkpoint Inhibitors/administration & dosage ; Immune Checkpoint Inhibitors/adverse effects ; Neoplasms/drug therapy ; Neoplasms/immunology ; Neoplasms/mortality ; Neoplasms/pathology ; Patient Safety ; Risk Assessment ; Risk Factors ; Time Factors ; Treatment Outcome
    Chemical Substances Immune Checkpoint Inhibitors
    Language English
    Publishing date 2021-03-03
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2719863-7
    ISSN 2051-1426 ; 2051-1426
    ISSN (online) 2051-1426
    ISSN 2051-1426
    DOI 10.1136/jitc-2020-001901
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Prevalence of intratumoral regulatory T cells expressing neuropilin-1 is associated with poorer outcomes in patients with cancer.

    Chuckran, Christopher A / Cillo, Anthony R / Moskovitz, Jessica / Overacre-Delgoffe, Abigail / Somasundaram, Ashwin S / Shan, Feng / Magnon, Grant C / Kunning, Sheryl R / Abecassis, Irina / Zureikat, Amer H / Luketich, James / Pennathur, Arjun / Sembrat, John / Rojas, Mauricio / Merrick, Daniel T / Taylor, Sarah E / Orr, Brian / Modugno, Francesmary / Buckanovich, Ron /
    Schoen, Robert E / Kim, Seungwon / Duvvuri, Umamaheswar / Zeh, Herbert / Edwards, Robert / Kirkwood, John M / Coffman, Lan / Ferris, Robert L / Bruno, Tullia C / Vignali, Dario A A

    Science translational medicine

    2021  Volume 13, Issue 623, Page(s) eabf8495

    Abstract: Despite the success of immune checkpoint blockade therapy, few strategies sufficiently overcome immunosuppression within the tumor microenvironment (TME). Targeting regulatory T cells ( ... ...

    Abstract Despite the success of immune checkpoint blockade therapy, few strategies sufficiently overcome immunosuppression within the tumor microenvironment (TME). Targeting regulatory T cells (T
    MeSH term(s) Animals ; Head and Neck Neoplasms ; Humans ; Immunotherapy ; Mice ; Neuropilin-1/metabolism ; Prevalence ; T-Lymphocytes, Regulatory ; Tumor Microenvironment
    Chemical Substances Neuropilin-1 (144713-63-3)
    Language English
    Publishing date 2021-12-08
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2518854-9
    ISSN 1946-6242 ; 1946-6234
    ISSN (online) 1946-6242
    ISSN 1946-6234
    DOI 10.1126/scitranslmed.abf8495
    Database MEDical Literature Analysis and Retrieval System OnLINE

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