SPOP suppresses osteosarcoma invasion via PI3K/AKT/NF-κB signaling pathway

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• Speckle-type POZ protein (SPOP) functions as an E3 ubiquitin ligase adaptor and is implicated in prostate and endometrial cancers.
• SPOP mediates oncogene SRC-3 ubiquitination and proteolysis in prostate cancer.
• The role of SPOP in osteosarcoma (OS) remains unexplored.

Purpose of the Study:

• To investigate the role of SPOP in osteosarcoma.
• To determine the effect of SPOP on the invasion and migration of OS cells.

Main Methods:

• Real-time PCR and Western blot were used to assess SPOP expression in OS samples and cell lines.
• Short hairpin RNA (shRNA) was employed to silence SPOP expression.
• In vitro assays, including Matrigel-coated invasion chambers, were utilized to evaluate OS cell invasion and migration.

Main Results:

• SPOP expression was found to be down-regulated in clinical OS samples and cell lines.
• Silencing SPOP expression enhanced the migratory and invasive capabilities of OS cells.
• Restoration of SPOP expression reversed these effects and modulated the PI3K/Akt/NF-κB signaling pathway.

Conclusions:

• Down-regulation of SPOP promotes OS cell migration and invasion by influencing the PI3K/Akt/NF-κB signaling pathway.
• SPOP represents a potential therapeutic target for inhibiting osteosarcoma invasion.