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Current Alzheimer Research


ISSN (Print): 1567-2050
ISSN (Online): 1875-5828

Research Article

Amyloid β-induced Mesenteric Inflammation in an Alzheimer’s Disease Transgenic Mouse Model

Author(s): Yasuhisa Ano*, Kumiko Ikado, Kazuyuki Uchida and Hiroyuki Nakayama

Volume 17, Issue 1, 2020

Page: [52 - 59] Pages: 8

DOI: 10.2174/1567205017666200212160343

Price: $65


Background: Alzheimer’s disease (AD) is a neurodegenerative disorder histopathologically characterized by the accumulation of amyloid β (Aβ) peptides and inflammation associated with activated microglia. These features are well investigated in the central nervous system using AD-model mice; however, peripheral inflammation in these mice has not been investigated well.

Objective: We evaluated the inflammatory responses, especially myeloid dendritic cells (mDCs), in peripheral lymphoid tissues in AD-model mice to determine their association with Aβ deposition.

Methods: We collected lymphocytes from mesenteric lymphoid nodes (MLNs) and Peyer’s patches (PPs) of 5×FAD transgenic mice used as an AD model. Lymphocytes were analyzed using a flow cytometer to characterize mDCs and T cells. Collected lymphocytes were treated with Aβ1-42 ex vivo to evaluate the inflammatory response.

Results: We observed elevated levels of inflammatory cytokines and chemokines including interleukin (IL)-12 and macrophage inflammatory protein-1α in mDCs from MLNs and PPs and reduced levels of programmed death-ligand-1, an immunosuppressive co-stimulatory molecule, on the surface of mDCs from 5×FAD mice. Additionally, we found increases in interferon (IFN)-γ-producing CD4- or CD8- positive T cells in MLNs were increased in 5×FAD mice. Moreover, ex vivo treatment with Aβ peptides increased the production of IL-12 and IFN-γ by lymphocytes from 5×FAD mice.

Conclusion: The present study showed that pro-inflammatory mDC and T cells were induced in MLNs and PPs of 5×FAD mice.

Keywords: Alzheimer's disease, amyloid β, mesenteric lymphoid node, myeloid dendritic cells, Peyer’s patch, T cells.

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