Lipoteichoic Acid from Lacticaseibacillus rhamnosus GG Modulates Dendritic Cells and T Cells in the Gut.

Lipoteichoic Acid from Lacticaseibacillus rhamnosus GG Modulates Dendritic Cells and T Cells in the Gut.
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DOI:
10.3390/nu14030723
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发表时间:
2022-02-08
期刊:
影响因子:
5.9
通讯作者:
González Maglio DH
González Maglio DH
中科院分区:
医学2区
文献类型:
--
作者:
Friedrich AD;Leoni J;Paz ML;González Maglio DH

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革兰氏阳性细菌的脂磷胆酸(LTA)根据其分离的细菌来源的不同,具有不同的免疫作用。鼠李糖乳杆菌GG-LTA (LGG-LTA)口服可降低uvb诱导的小鼠免疫抑制和皮肤肿瘤的发生。在本研究中,我们评估了LGG-LTA在体外和肠道相关淋巴组织(GALT)中对树突状细胞(DC)和T细胞的免疫调节作用。在细胞培养过程中,lta刺激的BMDC增加了CD86和MHC-II的表达,分泌低水平的促炎性和抗炎细胞因子。此外,lta处理的BMDC增加了T细胞启动能力,促进了IL-17A的分泌。另一方面,在口服lta处理的小鼠中,观察到成熟DC(固有层和Peyer 's斑块)的减少。同时,IL-12p35和IFN-γ转录增加(固有层和Peyer 's Patches)。最后,在Peyer斑块中观察到CD103+ DC数量的增加。总之,我们的数据表明,LGG-LTA激活DC细胞和T细胞。此外,我们发现口服LTA后,体内会触发th1偏向性免疫反应。这些效果证明了先前观察到的口服LTA活性。
Lipoteichoic acid (LTA) from Gram-positive bacteria exerts different immune effects depending on the bacterial source from which it is isolated. Lacticaseibacillus rhamnosus GG LTA (LGG-LTA) oral administration reduces UVB-induced immunosuppression and skin tumor development in mice. In the present work, we evaluate the immunomodulatory effect exerted by LGG-LTA in dendritic cells (DC) and T cells, both in vitro and in the gut-associated lymphoid tissue (GALT). During cell culture, LTA-stimulated BMDC increased CD86 and MHC-II expression and secreted low levels of pro and anti-inflammatory cytokines. Moreover, LTA-treated BMDC increased T cell priming capacity, promoting the secretion of IL-17A. On the other hand, in orally LTA-treated mice, a decrease in mature DC (lamina propria and Peyer’s patches) was observed. Concomitantly, an increase in IL-12p35 and IFN-γ transcription was presented (lamina propria and Peyer’s Patches). Finally, an increase in the number of CD103+ DC was observed in Peyer’s patches. Together, our data demonstrate that LGG-LTA activates DC and T cells. Moreover, we show that a Th1-biased immune response is triggered in vivo after oral LTA administration. These effects justify the oral LTA activity previously observed.
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