miR-422a inhibits osteosarcoma proliferation by targeting BCL2L2 and KRAS.

Abstract

Osteosarcoma is the most common primary malignant bone tumor in children and adolescents. However, the underlying mechanism of osteosarcoma carcinogenesis and progression remains unknown. In the present study, we evaluated the expression profile of miRNAs in osteosarcoma tissues and the adjacent normal tissues. We found that the expression of miR-422a was down-regulated in osteosarcoma tissues and cell lines. In addition, we observed significantly elevated levels of repressive H3K9me3 and H3K27me3 and decreased active H3K4me3 on the promote region of miR-422a in osteosarcoma cells and clinical samples. Furthermore, up-regulation of miR-422a exhibited both in vitro and in vivo anti-tumor effects by inhibiting osteosarcoma cell growth and inducing apoptosis and cell cycle arrest. We also found that miR-422a targeted BCL2L2 and KRAS and negatively regulated their protein expression. Furthermore, restoration of miR-422a and knockdown of BCL2L2 and KRAS promoted apoptosis and induce cell cycle arrest in osteosarcoma cells. Taken together, the present study demonstrates that miR-422a may serve as a tumor suppressor in osteosarcoma via inhibiting BCL2L2 and KRAS translation both in vitro and in vivo Therefore, miR-422a could be developed as a novel therapeutic target in osteosarcoma.

• Authors: Hao Zhang, Qian-Yun He, Guang-Chao Wang, Da-Ke Tong, Ren-Kai Wang, Wen-Bin Ding, Cheng Li, Qiang Wei, Chen Ding, Pei-Zhao Liu, Hao-Chen Cui, Xin Zhang, Di Li, Hao Tang, Fang Ji
• Journal: Bioscience reports (Biosci Rep) Vol. 38 Issue 2 (04 27 2018) ISSN: 1573-4935 [Electronic] England
• PMID: 29358307 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2018 The Author(s).

Chemical References

• Apoptosis Regulatory Proteins
• BCL2L2 protein, human
• KRAS protein, human
• MIRN422 microRNA, human
• MicroRNAs
• RNA, Neoplasm
• Proto-Oncogene Proteins p21(ras)

Topics

• Apoptosis
• Apoptosis Regulatory Proteins (biosynthesis, genetics)
• Bone Neoplasms (genetics, metabolism, pathology)
• Cell Line
• Cell Proliferation
• Female
• Genes, Tumor Suppressor
• Humans
• Male
• MicroRNAs (genetics, metabolism)
• Osteosarcoma (genetics, metabolism, pathology)
• Protein Biosynthesis
• Proto-Oncogene Proteins p21(ras) (biosynthesis, genetics)
• RNA, Neoplasm (genetics, metabolism)