miR-486-5p expression is regulated by DNA methylation in osteosarcoma

BMC Genomics. 2022 Feb 17;23(1):142. doi: 10.1186/s12864-022-08346-6.


Background: Osteosarcoma is the most common primary malignant tumour of bone occurring in children and young adolescents and is characterised by complex genetic and epigenetic changes. The miRNA miR-486-5p has been shown to be downregulated in osteosarcoma and in cancer in general.

Results: To investigate if the mir-486 locus is epigenetically regulated, we integrated DNA methylation and miR-486-5p expression data using cohorts of osteosarcoma cell lines and patient samples. A CpG island in the promoter of the ANK1 host gene of mir-486 was shown to be highly methylated in osteosarcoma cell lines as determined by methylation-specific PCR and direct bisulfite sequencing. High methylation levels were seen for osteosarcoma patient samples, xenografts and cell lines based on quantitative methylation-specific PCR. 5-Aza-2'-deoxycytidine treatment of osteosarcoma cell lines caused induction of miR-486-5p and ANK1, indicating common epigenetic regulation in osteosarcoma cell lines. When overexpressed, miR-486-5p affected cell morphology.

Conclusions: miR-486-5p represents a highly cancer relevant, epigenetically regulated miRNA in osteosarcoma, and this knowledge contributes to the understanding of osteosarcoma biology.

Keywords: ANK1; Bone; Cell line; Epigenetic; Sarcoma; cancer; miRNA.

MeSH terms

  • Bone Neoplasms* / genetics
  • Bone Neoplasms* / pathology
  • Cell Line, Tumor
  • Cell Proliferation
  • DNA Methylation
  • Epigenesis, Genetic
  • Gene Expression Regulation, Neoplastic
  • Humans
  • MicroRNAs* / genetics
  • MicroRNAs* / metabolism
  • Osteosarcoma* / genetics
  • Osteosarcoma* / pathology


  • MIRN486 microRNA, human
  • MicroRNAs