Reversible effects of vitamins C and E combination on oxidative stress-induced apoptosis in melamine-treated PC12...

Area of Science:

• Neuroscience
• Biochemistry
• Toxicology

Background:

• Melamine adulteration of food products is a significant public health concern.
• Melamine exposure is known to cause oxidative stress and apoptosis in neuronal cells.
• The protective effects of antioxidant vitamins against melamine-induced neurotoxicity require further investigation.

Purpose of the Study:

• To investigate the potential neuroprotective effects of antioxidant vitamins C and E, individually and in combination, against melamine-induced toxicity in PC12 cells.
• To elucidate the mechanisms underlying the protective effects, focusing on oxidative stress markers and apoptosis pathways.

Main Methods:

• Cultured PC12 cells were exposed to melamine to induce neurotoxicity.
• Cells were treated with vitamin C, vitamin E, or a combination of both.
• Cell viability, reactive oxygen species (ROS) production, malondialdehyde (MDA) levels, antioxidant enzyme activities, and apoptosis (caspase-3 activation, nuclear morphology) were assessed.

Main Results:

• The combination of vitamins C and E significantly enhanced PC12 cell viability compared to individual treatments.
• Vitamin complex treatment effectively reduced ROS generation and MDA levels, while increasing antioxidant enzyme activities.
• Combination therapy markedly inhibited melamine-induced apoptosis, evidenced by reduced caspase-3 activation and normal nuclear morphology.

Conclusions:

• Combined administration of vitamins C and E demonstrates significant neuroprotective effects against melamine-induced toxicity in PC12 cells.
• The protective mechanism involves the downregulation of oxidative stress and the prevention of apoptosis.
• This vitamin combination therapy represents a promising approach to mitigate melamine-induced neuronal injury.