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Amyloid β-induced Mesenteric Inflammation in an Alzheimer's Disease Transgenic Mouse Model.
Current Alzheimer Research ( IF 1.8 ) Pub Date : 2020-01-01 , DOI: 10.2174/1567205017666200212160343
Yasuhisa Ano 1, 2 , Kumiko Ikado 2 , Kazuyuki Uchida 1 , Hiroyuki Nakayama 1
Affiliation  

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.

中文翻译:

在阿尔茨海默氏病转基因小鼠模型中,淀粉样β诱导的肠系膜炎症。

背景技术阿尔茨海默氏病(AD)是一种神经退行性疾病,其组织病理学特征在于淀粉样β(Aβ)肽的积累和与活化的小胶质细胞相关的炎症。这些特征在AD模型小鼠的中枢神经系统中得到了很好的研究。但是,尚未对这些小鼠的周围炎症进行深入研究。目的我们评估了AD模型小鼠外周淋巴组织的炎症反应,尤其是髓样树突状细胞(mDC),以确定它们与Aβ沉积的关系。方法我们收集了5只FAD转基因小鼠的肠系膜淋巴结(MLN)和淋巴集结(PPs)的淋巴细胞作为AD模型。使用流式细胞仪分析淋巴细胞以表征mDC和T细胞。离体用Aβ1-42处理收集的淋巴细胞以评估炎症反应。结果我们观察到在MLN和PP的mDC中,炎症细胞因子和趋化因子(包括白介素(IL)-12和巨噬细胞炎性蛋白-1α)的水平升高,并且编程性死亡配体1(一种免疫抑制的共刺激分子)的水平降低了。来自5 x FAD小鼠的mDC。此外,我们发现5XFAD小鼠中MLN中产生干扰素(IFN)-γ的CD4或CD8阳性T细胞增加。此外,用Aβ肽进行离体治疗可增加5xFAD小鼠淋巴细胞产生的IL-12和IFN-γ。结论本研究表明,在5×FAD小鼠的MLN和PP中诱导了促炎性mDC和T细胞。结果我们观察到在MLN和PP的mDC中,炎症细胞因子和趋化因子(包括白介素(IL)-12和巨噬细胞炎性蛋白-1α)的水平升高,并且编程性死亡配体1(一种免疫抑制的共刺激分子)的水平降低了。来自5 x FAD小鼠的mDC。此外,我们发现5XFAD小鼠中MLN中产生干扰素(IFN)-γ的CD4或CD8阳性T细胞增加。此外,用Aβ肽进行离体治疗可增加5xFAD小鼠淋巴细胞产生的IL-12和IFN-γ。结论本研究表明,在5×FAD小鼠的MLN和PP中诱导了促炎性mDC和T细胞。结果我们观察到在MLN和PP的mDC中,炎症细胞因子和趋化因子(包括白介素(IL)-12和巨噬细胞炎性蛋白-1α)的水平升高,并且编程性死亡配体1(一种免疫抑制的共刺激分子)的水平降低了。来自5 x FAD小鼠的mDC。此外,我们发现5XFAD小鼠中MLN中产生干扰素(IFN)-γ的CD4或CD8阳性T细胞增加。此外,用Aβ肽进行离体治疗可增加5xFAD小鼠淋巴细胞产生的IL-12和IFN-γ。结论本研究表明,在5×FAD小鼠的MLN和PP中诱导了促炎性mDC和T细胞。5XFAD小鼠的mDC上的一种免疫抑制共刺激分子。此外,我们发现5XFAD小鼠中MLN中产生干扰素(IFN)-γ的CD4或CD8阳性T细胞增加。此外,用Aβ肽进行离体治疗可增加5xFAD小鼠淋巴细胞产生的IL-12和IFN-γ。结论本研究表明,在5×FAD小鼠的MLN和PP中诱导了促炎性mDC和T细胞。5XFAD小鼠的mDC上的一种免疫抑制性共刺激分子。此外,我们发现5XFAD小鼠中MLN中产生干扰素(IFN)-γ的CD4或CD8阳性T细胞增加。此外,用Aβ肽进行离体治疗可增加5xFAD小鼠淋巴细胞产生的IL-12和IFN-γ。结论本研究表明,在5×FAD小鼠的MLN和PP中诱导了促炎性mDC和T细胞。
更新日期:2020-02-12
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