2′-fucosyllactose (2′-FL); MUC2; NLRP6; goblet cell; Food Science; Microbiology; Health (social science); Health Professions (miscellaneous); Plant Science
Abstract :
[en] In several mice inflammatory models, human milk oligosaccharides (HMOs) were shown to protect the intestinal barrier by promoting mucin secretion and suppressing inflammation. However, the functions of the individual HMOs in enhancing mucin expression in vivo have not been compared, and the related mechanisms are not yet to be clarified. In this study, we investigated the modulatory effects of 2′-fucosyllactose (2′-FL), 3′-sialyllactose (3′-SL), galacto-oligosaccharide (GOS) and lactose (Lac) on goblet cells’ functions in vitro. The appropriate dosage of the four chemicals was assessed in LS174T cells using the CCK-8 method. Then they were supplemented into a homeostasis and inflammatory environment to further investigate their effects under different conditions. Mucin secretion-related genes, including mucin 2 (MUC2), trefoil factor family 3 (TFF3), resistin-like β (RETNLB), carbohydrate sulfotransferase 5 (CHST5) and galactose-3-O-sulfotransferase 2 (GAL3ST2), in LS174T cells were detected using quantitative RT-qPCR. The results showed that 2′-FL (2.5 mg/mL, 72 h) was unable to increase MUC2 secretion in a steady-state condition. Comparatively, it exhibited a greater ability to improve mucin secretion under an inflammatory condition compared with GOS, demonstrated by a significant increase in TFF3 and CHST5 mRNA expression levels (p > 0.05). However, 3′-SL and Lac exhibited no effects on mucin secretion. To further investigate the underlying mechanism via which 2′-FL enhanced goblet cells’ secretion function, the NOD-like receptor family pyrin domain containing 6 (NLRP6) gene, which is closely related to MUC2 secretion, was silenced using the siRNA method. After silencing the NLRP6 gene, the mRNA expression levels of MUC2, TFF3 and CHST5 in the (2′-FL + tumor necrosis factor α (TNF-α) + NLRP6 siRNA) group were significantly decreased compared with the (2′-FL + TNF-α) group (p > 0.05), indicating that NLRP6 was essential for MUC2 expression in goblet cells. We further found that 2′-FL could significantly decrease toll-like receptor 4 (TLR4, p < 0.05), myeloid differential protein-88 (MyD88, p < 0.05) and nuclear factor kappa-B (NF-κB, p < 0.05) levels in LS174T inflammatory cells, even when the NLRP6 was silenced. Altogether, these results indicated that in goblet cells, 2′-FL exerts its function via multiple processes, i.e., by promoting mucin secretion through NLRP6 and suppressing inflammation by inhibiting the TLR4/MyD88/NF-κB pathway.
Disciplines :
Food science
Author, co-author :
Yao, Qianqian ; Université de Liège - ULiège > TERRA Research Centre ; State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
Li, Huiying; Beijing Key Laboratory of Food Processing and Safety in Forestry, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100085, China
Gao, Yanan; State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
Zheng, Nan; State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
Delcenserie, Véronique ; Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Gestion de la qualité dans la chaîne alimentaire
Wang, Jiaqi ; State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
Language :
English
Title :
The Milk Active Ingredient, 2'-Fucosyllactose, Inhibits Inflammation and Promotes MUC2 Secretion in LS174T Goblet Cells In Vitro.
This study was funded by grants from the Scientific Research Project for Ministry of Modern Agro-Industry Technology Research System of China (CARS-36), the Agricultural Science and Technology Innovation Program (ASTIP-IAS12), and the National Key R&D Program of China (No. 2022YFD1301004).
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