Fluoride-Induced Oxidative and Inflammatory Stress in Osteosarcoma Cells: Does It Affect Bone Development Pathway?

Area of Science:

• Cell Biology
• Molecular Biology
• Toxicology

Background:

• Osteoblast cells are crucial for bone formation and are known to be negatively affected by oxidative stress.
• Fluoride exposure is a potential risk factor for bone health, but its molecular mechanisms on osteoblasts require further elucidation.

Purpose of the Study:

• To investigate the oxidative and inflammatory signatures in human osteosarcoma (HOS) cells exposed to sodium fluoride.
• To explore the association between these signatures and genes involved in osteoblastic differentiation and bone development pathways.

Main Methods:

• Human osteosarcoma (HOS) cells were exposed to a sublethal concentration (8 mg/L) of sodium fluoride for 30 days.
• Transcriptomic expression analysis was performed to identify differentially expressed genes.
• Quantitative PCR (qPCR) and Western blot analysis were used to validate key gene and protein expressions.

Main Results:

• Exposure to sodium fluoride resulted in significant alterations in 2632 transcripts.
• Genes associated with oxidative stress, inflammation, osteoblastic differentiation, and bone development pathways were significantly impacted.
• Serum amyloid A1 protein expression, a key inflammatory regulator, was validated.

Conclusions:

• Chronic oxidative and inflammatory stress are induced by fluoride exposure in HOS cells.
• Fluoride-induced stress is linked to the impediment of osteoblast differentiation and bone development pathways.