Correlation study of DNA methylation of WNT6 gene with osteosarcoma in children

Li,Li; Xu,Chi; Liu,Pingtao; Huang,Jia

doi:10.3892/ol.2017.6135

Correlation study of DNA methylation of WNT6 gene with osteosarcoma in children

Authors:
- Li Li
- Chi Xu
- Pingtao Liu
- Jia Huang
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Affiliations: Department Ⅰ of Orthopedics, Jingmen No. 2 People's Hospital, Jingmen, Hubei 448000, P.R. China, School of Health Sciences, Wuhan University, Wuhan, Hubei 430000, P.R. China, Department Ⅳ of Orthopedics, Jingmen No. 2 People's Hospital, Jingmen, Hubei 448000, P.R. China
Published online on: May 8, 2017 https://doi.org/10.3892/ol.2017.6135
Pages: 271-275
Copyright: © Li et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The aim of this study was to evaluate the status and explore the impact of DNA methylation of WNT6 gene with osteosarcoma in children. A total of 50 patients with primary osteosarcoma in children were enrolled. The expression of WNT6 protein was determined by immunohistochemical staining. The DNA methylation level of WNT6 gene was evaluated by methylation-specific PCR (MSP). Human MG63 osteosarcoma cells and human normal Hfob1.19 osteoblasts were selected and cultured. Western blot analysis was utilized to measure the expression of WNT6 in the two cell lines. MSP was used to assess the status of DNA methylation of WNT6 gene. The correlation between DNA methylation of WNT6 gene and prognosis of osteosarcoma in children was evaluated by statistical analysis of the clinical and prognostic data. The results of the immunohistochemical assay showed that 84% (42/50) of primary osteosarcoma was WNT6 positive. MSP indicated that DNA methylation of WNT6 gene was found in 9 cases (18%) of primary osteosarcoma. Western blot analysis showed that WNT6 protein expression in MG63 cells was significantly higher than that in normal human Hfob1.19 osteoblasts, whereas, the level of DNA methylation of WNT6 gene in MG63 cells was significantly lower than in Hfob1.19 cells. Analysis of survival, prognosis and their correlation found that the DNA methylation level of WNT6 gene was negatively correlated with the prognosis of children with osteosarcoma. In conclusion, there was a high level of WNT6 gene expression in primary osteosarcoma, which was mainly due to low DNA methylation level of WNT6 gene. The DNA methylation of WNT6 gene was negatively correlated with the prognosis of patients with osteosarcoma in children.

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