title: Immunoproteasome-Selective Inhibitors: A Promising Strategy to Treat Hematologic Malignancies, Autoimmune and Inflammatory Diseases.
abstract: The immunoproteasome is predominantly expressed in monocytes and lymphocytes and is responsible for the generation of antigenic peptides for cell-mediated immunity. Upon the exposure of inflammatory cytokines IFN-γ and TNF-α, constitutive subunits can be replaced by the synthesis of the immuno-core particles β1i, β2i and β5i. Recent studies demonstrated that the immunoproteasome function is not only limited to MHC class I presentation, but it is also implicated in a number of pathological disorders including hematological malignancies, inflammatory and autoimmune diseases. At present the commercially available proteasome inhibitors Bortezomib and Carfilzomib, which have been validated in multiple myeloma and other diseases, appear to target both the constitutive and immunoproteasomes indiscriminately. This lack of specificity may, in part, explain some of the side effects of these agents. In contrast, by selectively targeting the immunoproteasome, it may be possible to keep the antimyeloma and antilymphoma efficacy unchanged and, at the same time, to increase the therapeutic index. The aim of this review article is to discuss the most promising immunoproteasome core particle-selective inhibitors which have been developed in the recent years, with a particular attention to their structural features, mechanism of action and therapeutic application.
authors.affiliation: Dipartimento di Scienze del Farmaco e Prodotti per la Salute, University of Messina, Viale Annunziata, 98168 Messina, Italy. rettari@unime.it.
authors.forename: Roberta
authors.initials: R
authors.lastname: Ettari
authors.forename: Santo
authors.initials: S
authors.lastname: Previti
authors.forename: Alessandra
authors.initials: A
authors.lastname: Bitto
authors.forename: Silvana
authors.initials: S
authors.lastname: Grasso
authors.forename: Maria
authors.initials: M
authors.lastname: Zappalà
mesh_terms: D000818:Animals; D001327:Autoimmune Diseases / Q000188:drug therapy*; D005260:Female; D019337:Hematologic Neoplasms / Q000188:drug therapy* / Q000628:therapy; D006801:Humans; D007249:Inflammation / Q000188:drug therapy; D051379:Mice; D061988:Proteasome Inhibitors / Q000494:pharmacology / Q000627:therapeutic use*
chemical_list: D061988:Proteasome Inhibitors