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Hydroxyapatite nanoparticles inhibit the growth of human glioma cells in vitro and in vivo

Authors Chu SH, Feng DF, Ma YB, Li ZQ

Received 4 May 2012

Accepted for publication 2 June 2012

Published 12 July 2012 Volume 2012:7 Pages 3659—3666

DOI https://doi.org/10.2147/IJN.S33584

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Sheng-Hua Chu,1 Dong-Fu Feng,1 Yan-Bin Ma,1 Zhi-Qiang Li2

1Department of Neurosurgery, No 3 People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; 2Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, China

Abstract: Hydroxyapatite nanoparticles (nano-HAPs) have been reported to exhibit antitumor effects on various human cancers, but the effects of nano-HAPs on human glioma cells remain unclear. The aim of this study was to explore the inhibitory effect of nano-HAPs on the growth of human glioma U251 and SHG44 cells in vitro and in vivo. Nano-HAPs could inhibit the growth of U251 and SHG44 cells in a dose- and time-dependent manner, according to methyl thiazoletetrazolium assay and flow cytometry. Treated with 120 mg/L and 240 mg/L nano-HAPs for 48 hours, typical apoptotic morphological changes were noted under Hoechst staining and transmission electron microscopy. The tumor growth of cells was inhibited after the injection in vivo, and the related side effects significantly decreased in the nano-HAP-and-drug combination group. Because of the function of nano-HAPs, the expression of c-Met, SATB1, Ki-67, and bcl-2 protein decreased, and the expression of SLC22A18 and caspase-3 protein decreased noticeably. The findings indicate that nano-HAPs have an evident inhibitory action and induce apoptosis of human glioma cells in vitro and in vivo. In a drug combination, they can significantly reduce the adverse reaction related to the chemotherapeutic drug 1,3-bis(2-chloroethyl)-1-nitrosourea (BCNU).

Keywords: glioma, hydroxyapatite nanoparticles, growth mechanism

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