title: Plasma cells in immunopathology: concepts and therapeutic strategies.
abstract: Plasma cells are terminally differentiated B cells that secrete antibodies, important for immune protection, but also contribute to any allergic and autoimmune disease. There is increasing evidence that plasma cell populations exhibit a considerable degree of heterogeneity with respect to their immunophenotype, migration behavior, lifetime, and susceptibility to immunosuppressive drugs. Pathogenic long-lived plasma cells are refractory to existing therapies. In contrast, short-lived plasma cells can be depleted by steroids and cytostatic drugs. Therefore, long-lived plasma cells are responsible for therapy-resistant autoantibodies and resemble a challenge for the therapy of antibody-mediated autoimmune diseases. Both lifetime and therapy resistance of plasma cells are supported by factors produced within their microenviromental niches. Current results suggest that plasma cell differentiation and survival factors such as IL-6 also signal via mammalian miRNAs within the plasma cell to modulate downstream transcription factors. Recent evidence also suggests that plasma cells and/or their immediate precursors (plasmablasts) can produce important cytokines and act as antigen-presenting cells, exhibiting so far underestimated roles in immune regulation and bone homeostasis. Here, we provide an overview on plasma cell biology and discuss exciting, experimental, and potential therapeutic approaches to eliminate pathogenic plasma cells.
authors.affiliation: Institute for Systemic Inflammation Research (ISEF), University of Lübeck, Ratzeburger Allee 160, 23538, Lübeck, Germany.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Tiburzy
authors.forename: Upasana
authors.initials: U
authors.lastname: Kulkarni
authors.forename: Anja Erika
authors.initials: AE
authors.lastname: Hauser
authors.forename: Melanie
authors.initials: M
authors.lastname: Abram
authors.forename: Rudolf Armin
authors.initials: RA
authors.lastname: Manz
mesh_terms: D000818:Animals; D001842:Bone and Bones / Q000276:immunology / Q000378:metabolism; D002465:Cell Movement / Q000276:immunology; D002470:Cell Survival; D060833:Cellular Microenvironment / Q000276:immunology; D006706:Homeostasis; D006801:Humans; D007154:Immune System Diseases / Q000235:genetics / Q000276:immunology* / Q000378:metabolism / Q000628:therapy; D007109:Immunity; D035683:MicroRNAs / Q000235:genetics; D009092:Mucous Membrane / Q000166:cytology / Q000276:immunology; D009928:Organ Specificity / Q000276:immunology; D010641:Phenotype; D010950:Plasma Cells / Q000276:immunology* / Q000378:metabolism
chemical_list: D035683:MicroRNAs
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