Article ; Online: Role of DAMPs and cell death in autoimmune diseases: the example of multiple sclerosis.
2023 Volume 24, Issue 2, Page(s) 57–70
Abstract: Multiple sclerosis is a chronic neuroinflammatory demyelinating disease of the central nervous system (CNS) of unknown etiology and still incompletely clarified pathogenesis. The disease is generally considered a disorder resulting from a complex ... ...
| Abstract | Multiple sclerosis is a chronic neuroinflammatory demyelinating disease of the central nervous system (CNS) of unknown etiology and still incompletely clarified pathogenesis. The disease is generally considered a disorder resulting from a complex interplay between environmental risk factors and predisposing causal genetic variants. To examine the etiopathogenesis of the disease, two complementary pre-clinical models are currently discussed: the "outside-in" model proposing a peripherally elicited inflammatory/autoimmune attack against degraded myelin as the cause of the disease, and the "inside-out" paradigm implying a primary cytodegenerative process of cells in the CNS that triggers secondary reactive inflammatory/autoimmune responses against myelin debris. In this review, the integrating pathogenetic role of damage-associated molecular patterns (DAMPs) in these two scenario models is examined by focusing on the origin and sources of these molecules, which are known to promote neuroinflammation and, via activation of pattern recognition receptor-bearing antigen-presenting cells, drive and shape autoimmune responses. In particular, environmental factors are discussed that are conceptually defined as agents which produce endogenous DAMPs via induction of regulated cell death (RCD) or act themselves as exogenous DAMPs. Indeed, in the field of autoimmune diseases, including multiple sclerosis, recent research has focused on environmental triggers that cause secondary events in terms of subroutines of RCD, which have been identified as prolific sources of DAMPs. Finally, a model of a DAMP-driven positive feed-forward loop of chronic inflammatory demyelinating processes is proposed, aimed at reconciling the competing "inside-out" and "outside-in" paradigms. |
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| MeSH term(s) | Humans ; Alarmins/metabolism ; Autoimmune Diseases/metabolism ; Autoimmune Diseases/pathology ; Cell Death ; Inflammation ; Multiple Sclerosis/metabolism ; Multiple Sclerosis/pathology |
| Chemical Substances | Alarmins |
| Language | English |
| Publishing date | 2023-02-07 |
| Publishing country | England |
| Document type | Journal Article ; Review |
| ZDB-ID | 2060566-3 |
| ISSN | 1476-5470 ; 1466-4879 |
| ISSN (online) | 1476-5470 |
| ISSN | 1466-4879 |
| DOI | 10.1038/s41435-023-00198-8 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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