Apigenin attenuates streptozotocin-induced pancreatic β cell damage by its protective effects on cellular antioxidant...

Area of Science:

• Biochemistry
• Cell Biology
• Pharmacology

Background:

• Pancreatic beta cells are vulnerable to oxidative stress, a major contributor to diabetes-related cell damage.
• Developing effective therapeutics to protect these cells and identifying antioxidants for diabetes treatment are areas of growing interest.

Purpose of the Study:

• To investigate the protective effects of apigenin, a plant-derived flavonoid, against streptozotocin (STZ)-induced oxidative damage in rat insulinoma (RINm5F) pancreatic beta cells.
• To elucidate the underlying mechanisms of apigenin's protective action.

Main Methods:

• RINm5F cells were exposed to STZ to induce oxidative stress and cytotoxic effects.
• Cells were pretreated with apigenin to assess its protective capabilities.
• Measurements included intracellular reactive oxygen species (ROS) production, DNA damage, lipid peroxidation, protein carbonylation, and apoptosis.
• Gene transcription, protein expression, and enzyme activity of antioxidant enzymes were analyzed.

Main Results:

• STZ treatment induced significant oxidative stress and cytotoxicity in RINm5F cells.
• Apigenin pretreatment markedly reduced ROS production, DNA damage, lipid peroxidation, and protein carbonylation.
• Apigenin also attenuated STZ-induced apoptosis in pancreatic beta cells.
• The protective effects were linked to the amelioration of antioxidant enzyme loss at transcriptional, translational, and activity levels.

Conclusions:

• Apigenin demonstrates significant protective effects against STZ-induced oxidative damage in pancreatic beta cells.
• Apigenin acts as both a free radical scavenger and a regulator of cellular antioxidant defenses.
• These findings suggest apigenin holds promise as a novel therapeutic agent for diabetes treatment.