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Erschienen in: Graefe's Archive for Clinical and Experimental Ophthalmology 4/2021

20.10.2020 | Inflammatory Disorders

Linoleic acid inhibits in vitro function of human and murine dendritic cells, CD4+T cells and retinal pigment epithelial cells

verfasst von: Xinyue Huang, Shenglan Yi, Jianping Hu, Ziyu Du, Qingfeng Wang, Zi Ye, Guannan Su, Aize Kijlstra, Peizeng Yang

Erschienen in: Graefe's Archive for Clinical and Experimental Ophthalmology | Ausgabe 4/2021

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Abstract

Purpose

Increased linoleic acid (LA) was observed in acute anterior uveitis (AAU) patient feces in our previous study. To investigate the immunoregulatory effect of LA, we studied the effect of LA on human and murine dendritic cells (DCs), CD4+T cells, and retinal pigment epithelial (RPE) cells in vitro.

Methods

The level of LA in feces from AAU patients and healthy individuals was measured by gas chromatography coupled with a mass spectrometer (GC-MS). The immunoregulatory effect of LA on human and murine DCs, CD4+ T cells, and RPE cells was evaluated by enzyme linked immunosorbent assay (ELISA) and flow cytometry (FCM). The effect of LA on DCs was evaluated by Tandem mass tag (TMT)-based proteomics analysis.

Results

Increased LA was observed in feces from AAU patients (1018.35 ± 900.01 mg/kg) as compared with healthy individuals (472.55 ± 365.49 mg/kg, p = 0.0136). LA attenuated the antigen-presenting function of human and murine DCs by decreasing the expression of CD40, the secretion of IL-6 and IL-12p70, and the ability to shift naïve T cells towards T helper type 1 (Th1) and Th17 cells. LA also inhibited the secretion of MCP-1 and IL-8 from RPE cells. Proteomics analysis showed differential expression of 28 proteins, including squalene epoxidase (SQLE), farnesyl-diphosphate farnesyltransferase 1 (FDFT1), and cytochrome P450 family 51 subfamily A member 1 (CYP51A1), in LA-treated DCs compared with controls. LA also accelerated the apoptosis of DCs from healthy individuals.

Conclusion

LA inhibited the function of human and murine DCs, CD4+T cells, and RPE cells, regulated the expression of proteins, and promoted the apoptosis of human DCs. These results collectively suggest that LA might decrease the function of immune cells in vitro, and further studies are needed to investigate its role in the pathogenesis of AAU.
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Metadaten
Titel
Linoleic acid inhibits in vitro function of human and murine dendritic cells, CD4+T cells and retinal pigment epithelial cells
verfasst von
Xinyue Huang
Shenglan Yi
Jianping Hu
Ziyu Du
Qingfeng Wang
Zi Ye
Guannan Su
Aize Kijlstra
Peizeng Yang
Publikationsdatum
20.10.2020
Verlag
Springer Berlin Heidelberg
Erschienen in
Graefe's Archive for Clinical and Experimental Ophthalmology / Ausgabe 4/2021
Print ISSN: 0721-832X
Elektronische ISSN: 1435-702X
DOI
https://doi.org/10.1007/s00417-020-04972-6

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