Titanium nanotubes activate genes related to bone formation in vitro

Area of Science:

• Biomaterials Science
• Cell Biology
• Genetics

Background:

• Titanium is widely used for osseointegrable devices due to excellent mechanical properties and biocompatibility.
• Extensive in vivo and clinical studies support titanium's efficacy over 40 years.
• The precise genetic impact of titanium on cellular behavior remains incompletely understood.

Purpose of the Study:

• To investigate the effects of titanium nanotubes on osteoblast differentiation and proliferation.
• To analyze the expression of specific osteoblast-related genes in response to titanium nanotube stimulation.

Main Methods:

• Quantitative Real-Time RT-PCR was employed to analyze gene expression.
• Osteoblast genes including SP7, RUNX2, COL3A1, COL1A1, ALPL, SPP1, and FOSL1 were targeted.
• Osteoblasts were cultivated on titanium nanotubes for 15 and 30 days.

Main Results:

• After 15 days, titanium nanotubes upregulated SP7, ENG, FOSL1, and SPP1, while downregulating RUNX2, COL3A1, COL1A1, and ALPL.
• After 30 days, SP7, ENG, FOSL1, and RUNX2 were upregulated, with COL3A1, COL1A1, ALPL, and SPP1 downregulated.
• Gene expression patterns indicate dynamic changes in osteoblast activity over time.

Conclusions:

• Titanium nanotubes facilitate osteoblast differentiation and extracellular matrix deposition.
• Activation of osteoblast-related genes SPP1, FOSL1, and RUNX2 is key to these processes.
• The findings suggest titanium nanotubes enhance mineralization in dental pulp stem cells.