[Nickel smelting dust exposures to NIH/3T3 cellular mitochondrial damage and L-ascorbic acid interference effect]

Area of Science:

• Environmental toxicology
• Cell biology
• Biochemistry

Background:

• Nickel compounds are known carcinogens.
• Industrial smoke exposure poses health risks.
• Cellular damage mechanisms require further investigation.

Purpose of the Study:

• To investigate the protective effects of L-ascorbic acid against nickel-induced damage in mouse embryonic fibroblasts (NIH/3T3).
• To assess the impact of nickel exposure on mitochondrial function in NIH/3T3 cells.
• To determine if L-ascorbic acid can mitigate nickel's carcinogenic effects at the cellular level.

Main Methods:

• NIH/3T3 cells were exposed to varying concentrations of nickel refining dust.
• An intervention group received L-ascorbic acid treatment alongside nickel exposure.
• Cell viability (MTT assay), mitochondrial permeability transition pore (MPTP) opening (Calcein-AM), mitochondrial membrane potential (MMP) (JC-1), and mitochondrial respiratory chain complex activity were measured.

Main Results:

• Nickel exposure increased cell inhibition and MPTP opening while decreasing MMP and mitochondrial respiratory chain complex activity (I, II, IV) in a dose-dependent manner.
• L-ascorbic acid intervention significantly reduced nickel-induced cell damage and protected mitochondrial function.
• Statistical significance (P<0.05) was observed for all key findings.

Conclusions:

• Nickel exposure significantly damages NIH/3T3 cell mitochondria in a concentration-dependent manner.
• L-ascorbic acid demonstrates a protective effect against nickel-induced mitochondrial damage.
• These findings highlight the potential of L-ascorbic acid as a protective agent against environmental toxins.