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

Li Li1, Chi Xu2, Pingtao Liu1

  • 1Department I of Orthopedics, Jingmen No. 2 People's Hospital, Jingmen, Hubei 448000, P.R. China.

Oncology Letters
|July 12, 2017
PubMed

Insights

DNA methylation of the WNT6 gene is linked to childhood osteosarcoma. Lower WNT6 gene methylation correlates with poorer prognosis in pediatric osteosarcoma patients, indicating a potential biomarker.

Area of Science:

  • Oncology
  • Epigenetics
  • Pediatric Cancer Research

Background:

  • Osteosarcoma is a primary bone cancer affecting children and adolescents.
  • DNA methylation plays a crucial role in gene regulation and cancer development.
  • The WNT6 gene's role in osteosarcoma, particularly concerning its epigenetic regulation, requires further investigation.

Purpose of the Study:

  • To assess the DNA methylation status of the WNT6 gene in pediatric osteosarcoma.
  • To explore the relationship between WNT6 gene methylation and osteosarcoma in children.
  • To determine the impact of WNT6 gene methylation on patient prognosis.

Main Methods:

  • Immunohistochemical staining for WNT6 protein expression in 50 pediatric osteosarcoma samples.
  • Methylation-specific PCR (MSP) to evaluate WNT6 gene DNA methylation levels.
  • Western blot analysis in osteosarcoma (MG63) and normal osteoblast (Hfob1.19) cell lines.
  • Statistical analysis of clinical and prognostic data to correlate WNT6 methylation with outcomes.

Main Results:

  • WNT6 protein was expressed in 84% of primary osteosarcoma cases.
  • DNA methylation of the WNT6 gene was detected in 18% of primary osteosarcoma samples.
  • Osteosarcoma cells exhibited higher WNT6 protein expression and lower WNT6 gene methylation compared to normal osteoblasts.
  • A negative correlation was found between WNT6 gene DNA methylation levels and the prognosis of children with osteosarcoma.

Conclusions:

  • High WNT6 gene expression in pediatric osteosarcoma is associated with low DNA methylation levels.
  • WNT6 gene DNA methylation is negatively correlated with the prognosis of children diagnosed with osteosarcoma.
  • WNT6 gene methylation status may serve as a prognostic biomarker for pediatric osteosarcoma.