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Updated: Jul 21, 2026
Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
Published on: April 12, 2019
Effects of ZEB1 on regulating osteosarcoma cells via NF-κB/iNOS
1Hand and Foot Bone Surgery, Weifang People's Hospital, Weifang, Shandong, China. meixiuliu016@163.com.
Objective:
Osteosarcoma is one common malignant bone tumors, as it frequently has invasion, metastasis and recurrence, causing unfavorable prognosis of patients. Osteosarcoma has complicated pathogenesis, which has not been elucidated fully. Therefore, the identification of effective molecular target of osteosarcoma onset can help to improve treatment efficacy and prognosis of osteosarcoma. Zinc finger E-box binding homeobox 1 (ZEB1) protein is one member of zinc finger E-box binding protein family, and participates in embryonic genesis and development. A recent study found the participation of ZEB1 in mediating multiple tumor onset and its up-regulation of osteosarcoma. The regulatory mechanism of ZEB1 in osteosarcoma has not been illustrated yet.
Materials And Methods:
In vitro cultured osteosarcoma MG-63 cells were transfected with ZEB1 siRNA. Real-time PCR and Western blot were tested for ZEB1 mRNA/protein expression. MTT was used to test MG-63 cell proliferation, whilst cell invasion was used to describe the effect of ZEB1 on MG-63 cells. Caspase-3 activity assay was employed to test MG-63 cell apoptosis. Western blot was employed to detect nuclear factor kappa B (NF-kB) and inducible nitric oxide synthase (iNOS) protein expression.
Results:
After transfecting with ZEB1 siRNA, MG-63 cell proliferation or invasion was inhibited accompanied with lower ZEB1 mRNA/protein expression. Caspase3 activity was also increased after transfection (p < 0.05), along with down-regulation of NF-kB and iNOS proteins in MG-63 cells (p < 0.05).
Conclusions:
Inhibition of ZEB1 can facilitate osteosarcoma cell apoptosis and inhibit cell proliferation or invasion via down-regulating NF-kB/iNOS signal pathway.
Insights
Inhibiting Zinc finger E-box binding homeobox 1 (ZEB1) protein can reduce osteosarcoma cell growth and spread. This occurs by decreasing the NF-kB/iNOS signaling pathway, promoting cell death.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Osteosarcoma is a common malignant bone tumor with poor prognosis due to invasion, metastasis, and recurrence.
- The complex pathogenesis of osteosarcoma is not fully understood, necessitating the identification of effective molecular targets.
- Zinc finger E-box binding homeobox 1 (ZEB1) is implicated in tumor development and is upregulated in osteosarcoma, but its regulatory mechanism remains unclear.
Purpose of the Study:
- To investigate the role of ZEB1 in osteosarcoma progression.
- To elucidate the regulatory mechanism of ZEB1 in osteosarcoma.
- To determine if targeting ZEB1 can improve osteosarcoma treatment efficacy.
Main Methods:
- Osteosarcoma MG-63 cells were transfected with ZEB1 siRNA.
- ZEB1 mRNA and protein expression were assessed using real-time PCR and Western blot.
- Cell proliferation (MTT assay), invasion, apoptosis (caspase-3 activity), and NF-kB/iNOS protein levels were evaluated.
Main Results:
- Transfection with ZEB1 siRNA inhibited MG-63 cell proliferation and invasion.
- ZEB1 knockdown led to increased caspase-3 activity, indicating enhanced apoptosis.
- Down-regulation of NF-kB and iNOS proteins was observed in ZEB1-silenced cells.
Conclusions:
- Inhibition of ZEB1 facilitates osteosarcoma cell apoptosis.
- Targeting ZEB1 suppresses osteosarcoma cell proliferation and invasion.
- ZEB1 may exert its effects by down-regulating the NF-kB/iNOS signaling pathway.
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