Abstract
Purpose
Food-derived nanoparticles exert cytoprotective effects on intestinal cells by delivering their cargo, which includes macromolecules such as microRNAs and proteins, as well as low-molecular weight compounds. We previously reported that apple-derived nanoparticles (APNPs) downregulate the expression of human intestinal transporter OATP2B1/SLCO2B1 mRNA. To verify the involvement of the cargo of APNPs in affecting the expression of transporters, we characterized the uptake mechanism of APNPs in intestinal cells.
Methods
The uptake of fluorescent PKH26-labeled APNPs (PKH-APNPs) into Caco-2, LS180, and HT-29MTX cells was evaluated by confocal microscopy and flow cytometry.
Results
The uptake of PKH-APNPs was prevented in the presence of clathrin-dependent endocytosis inhibitors, chlorpromazine and Pitstop2. Furthermore, PKH-APNPs were incorporated by the HT29-MTX cells, despite the disturbance of the mucus layer. Additionally, the decrease in SLCO2B1 mRNA by APNPs was reversed by Pitstop 2 in Caco-2 cells, indicating that APNPs decrease SLCO2B1 by being incorporated via clathrin-dependent endocytosis.
Conclusions
We demonstrated that clathrin-dependent endocytosis was mainly involved in the uptake of APNPs by intestinal cells, and that the cargo in the APNPs downregulate the mRNA expression of SLCO2B1. Therefore, APNPs could be a useful tool to deliver large molecules such as microRNAs to intestinal cells.
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Abbreviations
- APNPs:
-
Apple-derived nanoparticles
- miRNA:
-
microRNA
- NPs:
-
Nanoparticles
- OATP2B1:
-
Organic anion-transporting polypeptide 2B1
- PKH-APNPs:
-
PKH26-labeled APNPs
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Arai, M., Komori, H., Fujita, D. et al. Uptake Pathway of Apple-derived Nanoparticle by Intestinal Cells to Deliver its Cargo. Pharm Res 38, 523–530 (2021). https://doi.org/10.1007/s11095-021-03018-8
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DOI: https://doi.org/10.1007/s11095-021-03018-8