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  1. Article ; Online: "Corneal Nerves, CD11c

    Niederkorn, Jerry Y

    Frontiers in immunology

    2021  Volume 12, Page(s) 701935

    Abstract: The eye and the brain have limited capacities for regeneration and as such, immune-mediated inflammation can produce devastating consequences in the form of neurodegenerative diseases of the central nervous system or blindness as a result of ocular ... ...

    Abstract The eye and the brain have limited capacities for regeneration and as such, immune-mediated inflammation can produce devastating consequences in the form of neurodegenerative diseases of the central nervous system or blindness as a result of ocular inflammatory diseases such as uveitis. Accordingly, both the eye and the brain are designed to limit immune responses and inflammation - a condition known as "immune privilege". Immune privilege is sustained by physiological, anatomical, and regulatory processes that conspire to restrict both adaptive and innate immune responses.
    MeSH term(s) Animals ; CD11c Antigen/immunology ; Cornea/immunology ; Dendritic Cells/immunology ; Humans ; Immune Privilege/immunology ; Immunity, Innate/immunology ; Inflammation/immunology
    Chemical Substances CD11c Antigen
    Language English
    Publishing date 2021-06-18
    Publishing country Switzerland
    Document type Journal Article ; Research Support, N.I.H., Extramural ; 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.2021.701935
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Book ; Online: Immune response and the eye

    Niederkorn, Jerry Y.

    in memory of J. Wayne Streilein, the pioneer in ocular immunology

    2007  

    Author's details vol. eds.: Jerry Y. Niederkorn
    Language English
    Size XX + 336 S.
    Edition 2nd, revised edition
    Publisher Karger
    Publishing place Basel
    Publishing country Switzerland
    Document type Book ; Online
    HBZ-ID TT050388192
    ISBN 978-3-318-01404-4 ; 3-318-01404-4
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  3. Article ; Online: The biology of Acanthamoeba keratitis.

    Niederkorn, Jerry Y

    Experimental eye research

    2020  Volume 202, Page(s) 108365

    Abstract: Acanthamoeba keratitis (AK) is a rare protozoal infection of the cornea. At least eight species of Acanthamoeba are known to cause this sight-threatening disease of the ocular surface. Acanthamoeba spp. exist in a wide array of niches ranging from ... ...

    Abstract Acanthamoeba keratitis (AK) is a rare protozoal infection of the cornea. At least eight species of Acanthamoeba are known to cause this sight-threatening disease of the ocular surface. Acanthamoeba spp. exist in a wide array of niches ranging from thermal springs to under ice and every conceivable habitat in between. Contact lens wear is the leading risk factor for AK and is practiced by over 30 million individuals in the United States, yet the incidence of AK is less than 33 cases per one million contact lens wearers. Serological studies have reported that 90%-100% of individuals with no history of AK possess antibodies specific for Acanthamoeba antigens indicating that exposure to this organism is commonplace, yet disease is remarkably rare. Animal studies have shed light on the pathobiology and immunobiology of AK and indicate that a constellation of factors including the ocular surface microbiome and the microbiome of Acanthamoeba itself contribute to the pathogenesis of AK. Interesting, secretory antibodies produced by the adaptive immune response can prevent the initiation of corneal infection, but once Acanthamoeba trophozoites breach the corneal epithelium the adaptive immune system is helpless in altering the course of AK. It has been almost 50 years since AK was first described, yet many questions remain unanswered about this curious and enigmatic disease of the ocular surface.
    MeSH term(s) Acanthamoeba/immunology ; Acanthamoeba Keratitis/diagnosis ; Acanthamoeba Keratitis/parasitology ; Animals ; Antibodies, Protozoan/immunology ; Contact Lenses/adverse effects ; Contact Lenses/parasitology ; Cornea/parasitology ; Cornea/pathology ; Eye Infections, Parasitic/diagnosis ; Eye Infections, Parasitic/parasitology ; Humans ; Risk Factors
    Chemical Substances Antibodies, Protozoan
    Language English
    Publishing date 2020-11-19
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 80122-7
    ISSN 1096-0007 ; 0014-4835
    ISSN (online) 1096-0007
    ISSN 0014-4835
    DOI 10.1016/j.exer.2020.108365
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: The Eye Sees Eye to Eye With the Immune System: The 2019 Proctor Lecture.

    Niederkorn, Jerry Y

    Investigative ophthalmology & visual science

    2019  Volume 60, Issue 13, Page(s) 4489–4495

    MeSH term(s) Allografts ; Animals ; Awards and Prizes ; Corneal Transplantation ; Florida ; History, 21st Century ; Humans ; Immune Privilege/physiology ; Immune System/physiology ; Mice ; Ocular Physiological Phenomena/immunology ; Ophthalmology/history ; Societies, Medical
    Language English
    Publishing date 2019-10-25
    Publishing country United States
    Document type Historical Article ; Journal Article ; Lecture ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 391794-0
    ISSN 1552-5783 ; 0146-0404
    ISSN (online) 1552-5783
    ISSN 0146-0404
    DOI 10.1167/iovs.19-28632
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Corneal Nerve Ablation Abolishes Ocular Immune Privilege by Downregulating CD103 on T Regulatory Cells.

    Neelam, Sudha / Niederkorn, Jerry Y

    Investigative ophthalmology & visual science

    2020  Volume 61, Issue 4, Page(s) 25

    Abstract: Purpose: Severing corneal nerves during orthotopic corneal transplantation elicits the elaboration of the neuropeptide substance P (SP), which induces the generation of CD11c+ contrasuppressor (CS) cells. CS cells disable T regulatory cells (Tregs) that ...

    Abstract Purpose: Severing corneal nerves during orthotopic corneal transplantation elicits the elaboration of the neuropeptide substance P (SP), which induces the generation of CD11c+ contrasuppressor (CS) cells. CS cells disable T regulatory cells (Tregs) that are induced when antigens enter the anterior chamber (AC), either by direct injection or by orthotopic corneal transplantation. This study examined the crucial cell surface molecules on Tregs that are adversely affected by CS cells that are generated by severing corneal nerves.
    Methods: CS cells were induced by producing shallow 2.0-mm circular incisions in the corneal epithelium in BALB/c mice. CD8+ Tregs were generated by injecting ovalbumin into the AC. The effects of CS cells and SP on the expression and function of two cell surface molecules (CD103 and the receptor of interferon-γ) that are crucial for the induction and function of CD8+ Tregs were analyzed.
    Results: SP converted CD11c+, but not CD11c- , dendritic cells (DCs) to CS cells. Severing corneal nerves resulted in a 66% reduction in the expression of CD103 on CD8+ AC-associated immune deviation (ACAID) Tregs, and a 50% reduction in the interferon-γ receptor (IFN-γR). These effects could be mimicked in vitro by coculturing CS cells with CD8+ ACAID Tregs.
    Conclusions: The elaboration of SP in response to corneal nerve ablation converts CD11c+ DCs to CS cells. CS cells disable CD8+ ACAID Tregs by downregulating two crucial cell surface molecules, CD103 and IFN-γR, by an SP-dependent pathway. Blocking this pathway may provide a means of restoring ocular immune privilege in corneas subjected to corneal nerve injury.
    MeSH term(s) Animals ; Anterior Chamber/immunology ; Antigens, CD/immunology ; Cells, Cultured ; Cornea/cytology ; Cornea/innervation ; Cornea/surgery ; Corneal Transplantation/methods ; Disease Models, Animal ; Graft Rejection ; Graft Survival ; Immune Privilege ; Immune Tolerance ; Integrin alpha Chains/immunology ; Interferon-gamma/metabolism ; Laser Therapy/methods ; Mice ; Mice, Inbred BALB C ; Substance P/metabolism ; T-Lymphocytes, Regulatory/immunology
    Chemical Substances Antigens, CD ; Integrin alpha Chains ; alpha E integrins ; Substance P (33507-63-0) ; Interferon-gamma (82115-62-6)
    Language English
    Publishing date 2020-04-15
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 391794-0
    ISSN 1552-5783 ; 0146-0404
    ISSN (online) 1552-5783
    ISSN 0146-0404
    DOI 10.1167/iovs.61.4.25
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Immunologic basis for development of keratoconjunctivitis sicca in systemic autoimmune diseases: Role of innate immune sensors.

    Stern, Michael E / Theofilopoulos, Argyrios N / Steven, Philipp / Niederkorn, Jerry Y / Fox, Robert / Calonge, Margarita / Scheid, Christof / Pflugfelder, Stephen C

    The ocular surface

    2024  Volume 32, Page(s) 130–138

    Abstract: The literature is filled with citations reporting an increased incidence of chronic dry eye disease, also known as keratoconjunctivitis sicca, in patients with systemic autoimmune diseases such as rheumatoid arthritis, Sjögren's Syndrome, systemic ... ...

    Abstract The literature is filled with citations reporting an increased incidence of chronic dry eye disease, also known as keratoconjunctivitis sicca, in patients with systemic autoimmune diseases such as rheumatoid arthritis, Sjögren's Syndrome, systemic sclerosis and lupus. As the most environmentally exposed mucosal surface of the body, the conjunctiva constantly responds to environmental challenges which are typically self limited, but when persistent and unresolved may provoke pathogenic innate and adaptive immune reactions. Our understanding of the pathophysiological mechanisms by which systemic autoimmune diseases cause dry eye inducing ocular surface inflammation continues to evolve. Conjunctival immune tone responds to self or foreign danger signals (including desiccating stress) on the ocular surface with an initial non-specific innate inflammatory response. If unchecked, this can lead to activation of dendritic cells that present antigen and prime T and B cells resulting in an adaptive immune reaction. These reactions generally resolve, but dysfunctional, hyper-responsive immune cells found in systemic autoimmune diseases that are recruited to the ocular surface can amplify inflammatory stress responses in the ocular surface and glandular tissues and result in autoimmune reactions that disrupt tear stability and lead to chronic dry eye disease. We here propose that unique features of the ocular surface immune system and the impact of systemic immune dysregulation in autoimmune diseases, can predispose to development of dry eye disease, and exacerbate severity of existing dry eye.
    MeSH term(s) Humans ; Keratoconjunctivitis Sicca/immunology ; Immunity, Innate ; Autoimmune Diseases/immunology ; Conjunctiva/immunology ; Conjunctiva/pathology ; Tears/immunology ; Tears/metabolism
    Language English
    Publishing date 2024-02-22
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2208578-6
    ISSN 1937-5913 ; 1542-0124
    ISSN (online) 1937-5913
    ISSN 1542-0124
    DOI 10.1016/j.jtos.2024.02.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Immunology of Corneal Allografts: Insights from Animal Models.

    Niederkorn, Jerry Y

    Journal of clinical & experimental ophthalmology

    2015  Volume 6, Issue 3

    Abstract: Corneal transplantation stands alone as the most common and successful form of solid organ transplantation. Even though HLA matching and systemic antirejection drugs are not routinely used, 90% of the first time corneal allografts will succeed. By ... ...

    Abstract Corneal transplantation stands alone as the most common and successful form of solid organ transplantation. Even though HLA matching and systemic antirejection drugs are not routinely used, 90% of the first time corneal allografts will succeed. By contrast, all other major categories of organ transplantation require HLA matching and the use of systemically administered immunosuppressive drugs. This remarkable success of corneal transplants under these conditions is an example of "immune privilege" and is the primary reason for the extraordinary success of corneal transplantation. A number of dogmas have emerged over the past century to explain immune privilege and the immunobiology of corneal transplantation. Many of these dogmas have been based largely on inferences from clinical observations on keratoplasty patients. The past 30 years have witnessed a wealth of rodent studies on corneal transplantation that have tested hypotheses and dogmas that originated from clinical observations on penetrating keratoplasty patients. Rodent models allow the application of highly sophisticated genetic and immunological tools for testing these hypotheses in a controlled environment and with experiments designed prospectively. These studies have validated some of the widely held assumptions based on clinical observations and in other cases, previous dogmas have been replaced with new insights that could only come from prospective studies performed under highly controlled conditions. This review highlights some of the key dogmas and these widely held assumptions that have been scrutinized through the use of rodent models of penetrating keratoplasty. This review also makes note of new immunological principles of corneal immunology that have emerged from rodent studies on corneal transplantation that most likely would not have been revealed in studies on corneal transplantation patients.
    Language English
    Publishing date 2015-08-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2592093-5
    ISSN 2155-9570
    ISSN 2155-9570
    DOI 10.4172/2155-9570.1000429
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Pathobiology and Immunobiology of

    Neelam, Sudha / Niederkorn, Jerry Y

    The Yale journal of biology and medicine

    2017  Volume 90, Issue 2, Page(s) 261–268

    Abstract: ... ...

    Abstract Acanthamoeba
    MeSH term(s) Acanthamoeba/immunology ; Acanthamoeba Keratitis/etiology ; Acanthamoeba Keratitis/immunology ; Acanthamoeba Keratitis/pathology ; Adaptive Immunity ; Animals ; Complement System Proteins/physiology ; Cornea/parasitology ; Cornea/pathology ; Disease Models, Animal ; Humans ; Immunity, Innate ; Immunity, Mucosal ; Risk Factors ; Toll-Like Receptors/physiology
    Chemical Substances Toll-Like Receptors ; Complement System Proteins (9007-36-7)
    Language English
    Publishing date 2017-06-23
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 200515-3
    ISSN 1551-4056 ; 0044-0086
    ISSN (online) 1551-4056
    ISSN 0044-0086
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Corneal transplantation and immune privilege.

    Niederkorn, Jerry Y

    International reviews of immunology

    2013  Volume 32, Issue 1, Page(s) 57–67

    Abstract: Corneal transplants have been successfully performed in human subjects for over 100 years and enjoy an immune privilege that is unrivaled in the field of transplantation. Immune privilege is defined as the reduced incidence and tempo in the immune ... ...

    Abstract Corneal transplants have been successfully performed in human subjects for over 100 years and enjoy an immune privilege that is unrivaled in the field of transplantation. Immune privilege is defined as the reduced incidence and tempo in the immune rejection of corneal allografts compared to other categories of organ allografts performed under the same conditions. Skin allografts transplanted across various MHC or minor histocompatibility barriers undergo rejection in approximately 100% of the hosts. By contrast, orthotopic corneal allografts experience long-term survival in 50% to >90% of the hosts, depending on the histocompatibility barriers that confront the host. The capacity of corneal allografts to evade immune rejection is attributable to multiple anatomical, physiological and immunoregulatory conditions that conspire to prevent the induction and expression of alloimmunity.
    MeSH term(s) Animals ; Corneal Transplantation ; Graft Survival/immunology ; Histocompatibility ; Humans ; Immune Tolerance ; T-Lymphocytes, Regulatory/immunology
    Language English
    Publishing date 2013-01-29
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 632825-8
    ISSN 1563-5244 ; 1545-5858 ; 0883-0185
    ISSN (online) 1563-5244 ; 1545-5858
    ISSN 0883-0185
    DOI 10.3109/08830185.2012.737877
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Ocular immune privilege and ocular melanoma: parallel universes or immunological plagiarism?

    Niederkorn, Jerry Y

    Frontiers in immunology

    2012  Volume 3, Page(s) 148

    Abstract: Evidence of immune privilege in the eye was recorded almost 140 years ago, yet interest in immune privilege languished for almost a century. However, the past 35 years have witnessed a plethora of research and a rekindled interest in the mechanisms ... ...

    Abstract Evidence of immune privilege in the eye was recorded almost 140 years ago, yet interest in immune privilege languished for almost a century. However, the past 35 years have witnessed a plethora of research and a rekindled interest in the mechanisms responsible for immune privilege in the anterior chamber of the eye. This research has demonstrated that multiple anatomical, structural, physiological, and immunoregulatory processes contribute to immune privilege and remind us of the enormous complexity of this phenomenon. It is widely accepted that immune privilege is an adaptation for reducing the risk of immune-mediated inflammation in organs such as the eye and brain whose tissues have a limited capacity to regenerate. Recent findings suggest that immune privilege also occurs in sites where stem cells reside and raise the possibility that immune privilege is also designed to prevent the unwitting elimination of stem cells by immune-mediated inflammation at these sites. Uveal melanoma arises within the eye and as such, benefits from ocular immune privilege. A significant body of research reveals an intriguing parallel between the mechanisms that contribute to immune privilege in the eye and those strategies used by uveal melanoma cells to evade immune elimination once they have disseminated from the eye and establish metastatic foci in the liver. Uveal melanoma metastases seem to have "plagiarized" the blueprints used for ocular immune privilege to create "ad hoc immune privileged sites" in the liver.
    Language English
    Publishing date 2012-06-13
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2012.00148
    Database MEDical Literature Analysis and Retrieval System OnLINE

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