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Article type: Review Article
Authors: Plantone, Domenicoa; * | Pardini, Matteob; c | Locci, Saraa | Nobili, Flaviob; c | De Stefano, Nicolaa
Affiliations: [a] Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy | [b] Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genova, Italy | [c] Ospedale Policlinico San Martino, IRCCS, Genoa, Italy
Correspondence: [*] Correspondence to: Domenico Plantone, Neurometabolic Unit, Dept. of Medicine, Surgery and Neuroscience, University of Siena, Viale Bracci 2, 53100 Siena, Italy. Tel.: +39 0577 232475; E-mail: [email protected].; ORCID: https://orcid.org/0000-0001-6666-7244.
Abstract: Alzheimer’s disease (AD) represents the most common type of neurodegenerative dementia and is characterized by extracellular amyloid-β (Aβ) deposition, pathologic intracellular tau protein tangles, and neuronal loss. Increasing evidence has been accumulating over the past years, supporting a pivotal role of inflammation in the pathogenesis of AD. Microglia, monocytes, astrocytes, and neurons have been shown to play a major role in AD-associated inflammation. However recent studies showed that the role of both T and B lymphocytes may be important. In particular, B lymphocytes are the cornerstone of humoral immunity, they constitute a heterogenous population of immune cells, being their mature subsets significantly impacted by the inflammatory milieu. The role of B lymphocytes on AD pathogenesis is gaining interest for several reasons. Indeed, the majority of elderly people develop the process of “inflammaging”, which is characterized by increased blood levels of proinflammatory molecules associated with an elevated susceptibility to chronic diseases. Epitope-specific alteration pattern of naturally occurring antibodies targeting the amino-terminus and the mid-domain of Aβ in both plasma and cerebrospinal fluid has been described in AD patients. Moreover, a possible therapeutic role of B lymphocytes depletion was recently demonstrated in murine AD models. Interestingly, active immunization against Aβ and tau, one of the main therapeutic strategies under investigation, depend on B lymphocytes. Finally. several molecules being tested in AD clinical trials can modify the homeostasis of B cells. This review summarizes the evidence supporting the role of B lymphocytes in AD from the pathogenesis to the possible therapeutic implications.
Keywords: Aging, Alzheimer’s disease, amyloid beta-peptides, B-lymphocytes, vaccination
DOI: 10.3233/JAD-220261
Journal: Journal of Alzheimer's Disease, vol. 88, no. 4, pp. 1241-1262, 2022
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