Ultraviolet B radiation converts Langerhans cells from immunogenic to tolerogenic antigen-presenting cells. Induction of specific clonal anergy in CD4+ T helper 1 cells. 1991

J C Simon, and R E Tigelaar, and P R Bergstresser, and D Edelbaum, and P D Cruz
Department of Dermatology, University of Texas Southwestern Medical Center, Dallas 75235.

We have recently demonstrated that a single dose (200 J/m2) of UVB radiation abrogates the capacity of mouse epidermal Langerhans cells (LC) or splenic adherent cells (SAC) to present keyhole limpet hemocyanin (KLH) to Ag-specific, MHC-restricted CD4+ Th1 cells. In the present study we determined whether such Th1 unresponsiveness represented long-lasting immunologic tolerance. To address this question, Th1 were preincubated with KLH-pulsed UVB-LC or UVB-SAC, then isolated and restimulated with unirradiated APC (LC or SAC) plus KLH or with exogenous rIL-2 in the absence of APC. Preincubation with KLH and UVB-LC or UVB-SAC rendered Th1 unresponsive to subsequent restimulation with APC and KLH. In addition, such Th1 were defective in their autocrine IL-2 production, but could respond normally to exogenous rIL-2, indicating that unresponsiveness was due to functional inactivation and not to cell death. Th1 unresponsiveness was Ag-specific, MHC-restricted, and long lasting (greater than 16 days). In addition, it appears that Th1 unresponsiveness is not due to the release of soluble suppressor factors from UVB-LC or UVB-SAC because supernatants from such cells had no effect on Th1 proliferation. Addition of unirradiated allogeneic SAC during preincubation prevented the induction of unresponsiveness by UVB-LC or UVB-SAC, suggesting that UVB interferes with the capacity of LC or SAC to deliver a costimulatory signal(s) that can be provided by allogeneic SAC. We conclude that UVB can convert LC or SAC from immunogenic to tolerogenic APC.

UI MeSH Term Description Entries
D006968 Hypersensitivity, Delayed An increased reactivity to specific antigens mediated not by antibodies but by sensitized T CELLS. Hypersensitivity, Tuberculin-Type,Hypersensitivity, Type IV,Tuberculin-Type Hypersensitivity,Type IV Hypersensitivity,Delayed Hypersensitivity,Delayed Hypersensitivities,Hypersensitivity, Tuberculin Type,Tuberculin Type Hypersensitivity,Tuberculin-Type Hypersensitivities,Type IV Hypersensitivities
D007108 Immune Tolerance The specific failure of a normally responsive individual to make an immune response to a known antigen. It results from previous contact with the antigen by an immunologically immature individual (fetus or neonate) or by an adult exposed to extreme high-dose or low-dose antigen, or by exposure to radiation, antimetabolites, antilymphocytic serum, etc. Immunosuppression (Physiology),Immunosuppressions (Physiology),Tolerance, Immune
D007376 Interleukin-2 A soluble substance elaborated by antigen- or mitogen-stimulated T-LYMPHOCYTES which induces DNA synthesis in naive lymphocytes. IL-2,Lymphocyte Mitogenic Factor,T-Cell Growth Factor,TCGF,IL2,Interleukin II,Interleukine 2,RU 49637,RU-49637,Ro-23-6019,Ro-236019,T-Cell Stimulating Factor,Thymocyte Stimulating Factor,Interleukin 2,Mitogenic Factor, Lymphocyte,RU49637,Ro 23 6019,Ro 236019,Ro236019,T Cell Growth Factor,T Cell Stimulating Factor
D007801 Langerhans Cells Recirculating, dendritic, antigen-presenting cells containing characteristic racket-shaped granules (Birbeck granules). They are found principally in the stratum spinosum of the EPIDERMIS and are rich in Class II MAJOR HISTOCOMPATIBILITY COMPLEX molecules. Langerhans cells were the first dendritic cell to be described and have been a model of study for other dendritic cells (DCs), especially other migrating DCs such as dermal DCs and INTERSTITIAL DENDRITIC CELLS. Langerhans Cell,Dendritic Cells, Dermal,Dendritic Cells, Epidermal,Dendritic Cells, Skin,Dermal Dendritic Cells,Epidermal Dendritic Cells,Skin Dendritic Cells,Cell, Dermal Dendritic,Cell, Epidermal Dendritic,Cell, Langerhans,Cell, Skin Dendritic,Cells, Dermal Dendritic,Cells, Epidermal Dendritic,Cells, Langerhans,Cells, Skin Dendritic,Dendritic Cell, Dermal,Dendritic Cell, Epidermal,Dendritic Cell, Skin,Dermal Dendritic Cell,Epidermal Dendritic Cell,Skin Dendritic Cell
D008807 Mice, Inbred BALB C An inbred strain of mouse that is widely used in IMMUNOLOGY studies and cancer research. BALB C Mice, Inbred,BALB C Mouse, Inbred,Inbred BALB C Mice,Inbred BALB C Mouse,Mice, BALB C,Mouse, BALB C,Mouse, Inbred BALB C,BALB C Mice,BALB C Mouse
D008809 Mice, Inbred C3H An inbred strain of mouse that is used as a general purpose strain in a wide variety of RESEARCH areas including CANCER; INFECTIOUS DISEASES; sensorineural, and cardiovascular biology research. Mice, C3H,Mouse, C3H,Mouse, Inbred C3H,C3H Mice,C3H Mice, Inbred,C3H Mouse,C3H Mouse, Inbred,Inbred C3H Mice,Inbred C3H Mouse
D004307 Dose-Response Relationship, Radiation The relationship between the dose of administered radiation and the response of the organism or tissue to the radiation. Dose Response Relationship, Radiation,Dose-Response Relationships, Radiation,Radiation Dose-Response Relationship,Radiation Dose-Response Relationships,Relationship, Radiation Dose-Response,Relationships, Radiation Dose-Response
D005260 Female Females
D006377 T-Lymphocytes, Helper-Inducer Subpopulation of CD4+ lymphocytes that cooperate with other lymphocytes (either T or B) to initiate a variety of immune functions. For example, helper-inducer T-cells cooperate with B-cells to produce antibodies to thymus-dependent antigens and with other subpopulations of T-cells to initiate a variety of cell-mediated immune functions. Helper Cell,Helper Cells,Helper T Cell,Helper-Inducer T-Lymphocytes,Inducer Cell,Inducer Cells,T-Cells, Helper-Inducer,T-Lymphocytes, Helper,T-Lymphocytes, Inducer,Helper T-Cells,Cell, Helper T,Cells, Helper T,Helper Inducer T Lymphocytes,Helper T Cells,Helper T-Cell,Helper T-Lymphocyte,Helper T-Lymphocytes,Helper-Inducer T-Cell,Helper-Inducer T-Cells,Helper-Inducer T-Lymphocyte,Inducer T-Lymphocyte,Inducer T-Lymphocytes,T Cell, Helper,T Cells, Helper,T Cells, Helper Inducer,T Lymphocytes, Helper,T Lymphocytes, Helper Inducer,T Lymphocytes, Inducer,T-Cell, Helper,T-Cell, Helper-Inducer,T-Cells, Helper,T-Lymphocyte, Helper,T-Lymphocyte, Helper-Inducer,T-Lymphocyte, Inducer
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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