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Gold nanoparticles promote osteogenic differentiation in human adipose-derived mesenchymal stem cells through the Wnt/β-catenin signaling pathway

Authors Choi SY, Song MS, Ryu PD, Lam ATN, Joo S, Lee SY

Received 5 December 2014

Accepted for publication 31 March 2015

Published 7 July 2015 Volume 2015:10(1) Pages 4383—4392


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Editor who approved publication: Prof. Dr. Thomas J Webster

Seon Young Choi,1 Min Seok Song,1 Pan Dong Ryu,1 Anh Thu Ngoc Lam,2 Sang-Woo Joo,2 So Yeong Lee1

1Laboratory of Veterinary Pharmacology, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, 2Department of Chemistry, Soongsil University, Seoul, South Korea

Abstract: Gold nanoparticles (AuNPs) are attractive materials for use in biomedicine due to their physical properties. Increasing evidence suggests that several nanoparticles induce the differentiation of human mesenchymal stem cells into osteoblasts and adipocytes. In this study, we hypothesized that chitosan-conjugated AuNPs promote the osteogenic differentiation of human adipose-derived mesenchymal stem cells. For the evaluation of osteogenic differentiation, alizarin red staining, an alamarBlue® assay, and a quantitative real-time polymerase chain reaction analysis were performed. In order to examine specific signaling pathways, immunofluorescence and a western blotting assay were performed. Our results demonstrate that chitosan-conjugated AuNPs increase the deposition of calcium content and the expression of marker genes related to osteogenic differentiation in human adipose-derived mesenchymal stem cells at nontoxic concentrations. These results indicate that chitosan-conjugated AuNPs promote osteogenesis through the Wnt/β-catenin signaling pathway. Therefore, chitosan-conjugated AuNPs can be used as a reagent for promoting bone formation.

Keywords: chitosan-conjugated gold nanoparticle, mineralization, nonphosphorylated beta-catenin

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