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• W4310593158 abstract "Rationale: Neuroinflammation is a primary feature of Alzheimer's disease (AD), for which an increasing number of drugs have been specifically developed. The present study aimed to define the therapeutic impact of a specific subpopulation of T cells that can suppress excessive inflammation in various immune and inflammatory disorders, namely, CD4+CD25+Foxp3+ regulatory T cells (Tregs). Methods: To generate Aβ antigen-specific Tregs (Aβ+ Tregs), Aβ 1-42 peptide was applied in vivo and subsequent in vitro splenocyte culture. After isolating Tregs by magnetic bead based purification method, Aβ+ Tregs were adoptively transferred into 3xTg-AD mice via tail vein injection. Therapeutic efficacy was confirmed with behavior test, Western blot, quantitative real-time PCR (qRT-PCR), enzyme-linked immunosorbent assay (ELISA), and immunohistochemistry staining (IHC). In vitro suppression assay was performed to evaluate the suppressive activity of Aβ+ Tregs using flow cytometry. Thy1.1+ Treg trafficking and distribution was analyzed to explore the infused Tregs migration into specific organs in an antigen-driven manner in AD mice. We further assessed cerebral glucose metabolism using 18F-FDG-PET, an imaging approach for AD biological definition. Subsequently, we evaluated the migration of Aβ+ Tregs toward Aβ activated microglia using live cell imaging, chemotaxis, antibody blocking and migration assay. Results: We showed that Aβ-stimulated Tregs inhibited microglial proinflammatory activity and modulated the microglial phenotype via bystander suppression. Single adoptive transfer of Aβ+ Tregs was enough to induce amelioration of cognitive impairments, Aβ accumulation, hyper-phosphorylation of tau, and neuroinflammation during AD pathology. Moreover, Aβ-specific Tregs effectively inhibited inflammation in primary microglia induced by Aβ exposure. It may indicate bystander suppression in which Aβ-specific Tregs promote immune tolerance by secreting cytokines to modulate immune responses during neurodegeneration. Conclusions: The administration of Aβ antigen-specific regulatory T cells may represent a new cellular therapeutic strategy for AD that acts by modulating the inflammatory status in AD." @default.
• W4310593158 created "2022-12-12" @default.
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• W4310593158 date "2022-01-01" @default.
• W4310593158 modified "2023-10-05" @default.
• W4310593158 title "Adoptive therapy with amyloid-β specific regulatory T cells alleviates Alzheimer's disease" @default.
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• W4310593158 doi "https://doi.org/10.7150/thno.75965" @default.
• W4310593158 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36451854" @default.
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