Doxorubicin Inhibits Proliferation of Osteosarcoma Cells Through Upregulation of the Notch Signaling Pathway.

Abstract

Doxorubicin plays a major role in the treatment of osteosarcoma disorders. The Notch signaling pathway exerts various biological functions, including cell proliferation, differentiation, and apoptosis. In the present study, we investigated the effects of different doses of doxorubicin on proliferation and apoptosis of osteosarcoma cells with or without Notch signaling. Results found that cellular viability was downregulated while caspase 3 activity and expression were promoted in osteosarcoma cells following treatment with various doses of doxorubicin for 24, 48, and 72 h, and the effects showed a dose- and time-dependent manner. Furthermore, it was found that various doses of doxorubicin activated the Notch signaling pathway, shown by the elevated expression of Notch target genes NOTCH1, HEY1, HES1, AND HES5. It was further proved that, after small interfering RNA (siRNA)-mediated knockdown of Notch, the effects of doxorubicin on the viability and apoptosis of osteosarcoma cells were significantly reduced. It was indicated that doxorubicin treatment reduced the proliferation and promoted the apoptosis of osteosarcoma cells, and this effect was mediated by the Notch signaling pathway.

• Authors: Peng Ji, Ling Yu, Wei-Chun Guo, Hong-Jun Mei, Xiao-Ju Wang, Hu Chen, Shuo Fang, Jian Yang
• Journal: Oncology research (Oncol Res) Vol. 22 Issue 4 Pg. 185-191 ( 2014) ISSN: 1555-3906 [Electronic] United States
• PMID: 26351207 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Antibiotics, Antineoplastic
• Basic Helix-Loop-Helix Transcription Factors
• Cell Cycle Proteins
• HEY1 protein, human
• Homeodomain Proteins
• NOTCH1 protein, human
• Receptor, Notch1
• Receptors, Notch
• Repressor Proteins
• Transcription Factor HES-1
• HES5 protein, human
• HES1 protein, human
• Doxorubicin

Topics

• Antibiotics, Antineoplastic (pharmacology)
• Apoptosis (drug effects)
• Basic Helix-Loop-Helix Transcription Factors (genetics, metabolism)
• Bone Neoplasms (drug therapy, genetics, metabolism, pathology)
• Cell Cycle Proteins (genetics, metabolism)
• Cell Line, Tumor
• Cell Proliferation (drug effects)
• Cell Survival (drug effects)
• Dose-Response Relationship, Drug
• Doxorubicin (pharmacology)
• Gene Expression Regulation, Neoplastic
• Homeodomain Proteins (genetics, metabolism)
• Humans
• Osteosarcoma (drug therapy, genetics, metabolism, pathology)
• RNA Interference
• Receptor, Notch1 (genetics, metabolism)
• Receptors, Notch (genetics, metabolism)
• Repressor Proteins (genetics, metabolism)
• Signal Transduction (drug effects)
• Time Factors
• Transcription Factor HES-1
• Transfection
• Up-Regulation