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- W2790603693 abstract "Abstract Phospholipids have been shown to modulate intestinal cholesterol absorption in cells and animals, a process that is regulated by several transporter proteins. Of these proteins, Niemann–Pick C1‐Like 1 (NPC1L1) is a major contributor to this process. The mechanism by which phospholipids modulate cholesterol absorption remains unknown. Here, we evaluate the effects of egg‐yolk phospholipids on cholesterol absorption and transport in human colon carcinoma cell line (Caco‐2 cells) and on the expression of NPC1L1 and others proteins associated with cholesterol absorption (ABCG5, ABCG8, ABCA1, ACAT2, MTP, CAV‐1, ANX‐2). The roles of SREBP‐1 and SREBP‐2 in this process were also investigated. The results show that egg‐yolk sphingomyelin (CerPCho) and phosphatidylcholine (PtdCho) inhibit cholesterol transport in the Caco‐2 monolayer in a dose‐dependent manner. These might be due to the decrease of the cholesterol solubility in micelles as well as to the increases in the micellar sizes and the bile acid‐binding capacity. Furthermore, the treatments with egg‐yolk CerPCho or PtdCho at 1.2 mmol/L reduced the expression levels of NPC1L1 protein to 21 or 22%, respectively, and its mRNA to 9 or 31% of that in the control group ( p < 0.05). Moreover, there was a general inhibitory effect of egg‐yolk PtdCho and CerPCho on the mRNA levels of SREBP‐1, and SREBP‐2. These results suggest that the inhibitory effect of egg‐yolk CerPCho and PtdCho on cholesterol transport might be due to their interference with the physicochemical properties of micelles and their regulations on the expression of the NPC1L1 gene." @default.
- W2790603693 created "2018-03-29" @default.
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- W2790603693 date "2018-02-01" @default.
- W2790603693 modified "2023-10-17" @default.
- W2790603693 title "Egg‐Yolk Sphingomyelin and Phosphatidylcholine Attenuate Cholesterol Absorption in Caco‐2 Cells" @default.
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- W2790603693 doi "https://doi.org/10.1002/lipd.12018" @default.
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