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Updated: Oct 7, 2025
Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
Published on: April 12, 2019
Interfering with pak4 Protein Expression Affects Osteosarcoma Cell Proliferation and Migration
Yuxin Fu1, Lun Fang1, Qipu Yin1
1Institute of Sports Medicine, Shandong First Medical University & Shandong Academy Medical Sciences, 619 Changcheng Road, Taian, 271016 Shandong, China.
Purpose:
A number of studies have discovered various roles of PAK4 in human tumors, including osteosarcoma. However, the exact role of PAK4 in osteosarcoma and its mechanism have yet to be determined. Therefore, this study focused on interrogating the PAK4 effect on the proliferation and migration ability of osteosarcoma and its underlying mechanisms.
Materials And Methods:
Western blot and QRT-PCR were utilized to quantify the PAK4 relative protein and mRNA levels. To measure cellular viability and mobility, the MTT and wound-healing assays were preferred.
Results:
With the adenovirus-mediated overexpression of PAK4, the proliferation and migration of U2-OS and MG-63 osteosarcoma cells were stimulated. Furthermore, a liposome-mediated knockout of PAK4 will inhibit osteosarcoma cells from proliferating. In terms of mechanism, we observed the positive correlation of PAK4 expression with expression of P21, CyclinD1, CyclinE1, CDK2, and CDK6, which drives G0/G1 to the G2/M phase transition. PAK4 can also activate Erk expression in OS cells and induce EMT.
Conclusion:
Interfering with PAK4 protein expression has been shown to affect osteosarcoma proliferation and migration.
Insights
This study investigated the role of PAK4 in osteosarcoma, finding that PAK4 protein expression significantly impacts cancer cell proliferation and migration. Interfering with PAK4 affects osteosarcoma progression.
Area of Science:
- Oncology
- Molecular Biology
Background:
- The role of PAK4 in human tumors is recognized, but its specific function and mechanisms in osteosarcoma remain unclear.
- Understanding PAK4's involvement is crucial for developing targeted osteosarcoma therapies.
Purpose of the Study:
- To investigate the effect of PAK4 on osteosarcoma cell proliferation and migration.
- To elucidate the underlying molecular mechanisms of PAK4 in osteosarcoma.
Main Methods:
- Quantitative real-time PCR (QRT-PCR) and Western blot were used to measure PAK4 protein and mRNA levels.
- Cellular viability and mobility were assessed using MTT and wound-healing assays.
- Adenovirus-mediated overexpression and liposome-mediated knockout were employed to manipulate PAK4 levels.
Main Results:
- Overexpression of PAK4 stimulated proliferation and migration in U2-OS and MG-63 osteosarcoma cells.
- Knockout of PAK4 inhibited osteosarcoma cell proliferation.
- PAK4 expression positively correlated with cell cycle regulators (P21, CyclinD1, CyclinE1, CDK2, CDK6), promoting G0/G1 to G2/M phase transition.
- PAK4 activated Erk expression and induced epithelial-mesenchymal transition (EMT) in osteosarcoma cells.
Conclusions:
- PAK4 plays a significant role in regulating osteosarcoma cell proliferation and migration.
- Modulating PAK4 protein expression presents a potential therapeutic strategy for osteosarcoma.
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