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Clathrin‐Mediated Endocytosis of Gold Nanoparticles In Vitro
Author(s) -
Ng Cheng Teng,
Tang Florence Mei Ai,
Li Jasmine Jia'en,
Ong Cynthia,
Yung Lanry Lin Yue,
Bay Boon Huat
Publication year - 2015
Publication title -
the anatomical record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.678
H-Index - 62
eISSN - 1932-8494
pISSN - 1932-8486
DOI - 10.1002/ar.23051
Subject(s) - endocytosis , colloidal gold , internalization , biophysics , clathrin , chemistry , receptor mediated endocytosis , cytoplasm , electron microscope , transmission electron microscopy , microbiology and biotechnology , cell , nanotechnology , nanoparticle , materials science , biochemistry , biology , physics , optics
ABSTRACT Gold nanoparticles (AuNPs) have potential biomedical and scientific applications. In this study, we evaluated the uptake and internalization of FBS‐coated 20 nm AuNPs into lung fibroblasts and liver cells by different microscopy techniques. AuNP aggregates were observed inside MRC5 lung fibroblasts and Chang liver cells under light microscopy, especially after enhancement with automegallography. Clusters of AuNPs were observed to be adsorbed on the cell surface by scanning electron microscopy. Ultrathin sections showed that AuNPs were mainly enclosed within cytoplasmic vesicles when viewed under transmission electron microscopy. We also investigated the mechanism of uptake for AuNPs, using endocytosis inhibitors and quantification of Au with inductively coupled plasma mass spectrometry. Cells treated with concanavalin A and chlorpromazine showed significant decrease of Au uptake in MRC5 lung fibroblasts and Chang liver cells, respectively, implying that the uptake of AuNPs was facilitated by clathrin‐mediated endocytosis. It would therefore appear that uptake of 20 nm AuNPs in both cell types with different tissues of origin, was dependent upon clathrin‐mediated endocytosis. Anat Rec, 298:418–427, 2015. © 2014 Wiley Periodicals, Inc.