Beneficial Effect of Jojoba Seed Extracts on Hyperglycemia-Induced Oxidative Stress in RINm5f Beta Cells

Area of Science:

• Biochemistry
• Cell Biology
• Pharmacology

Background:

• Hyperglycemia in diabetes and insulin resistance elevates reactive oxygen species (ROS), causing oxidative stress and cellular damage.
• Polyphenols are crucial in combating oxidative stress.
• Jojoba seeds contain simmondsin, a molecule with potential antioxidant properties.

Purpose of the Study:

• To investigate the antioxidant effects of simmondsin and jojoba seed aqueous extract on fructose-induced oxidative stress in RINm5f beta cells.
• To evaluate their impact on cell viability, insulin secretion, ROS production, and antioxidant signaling pathways.

Main Methods:

• RINm5f beta cells were exposed to fructose to induce oxidative stress.
• Cells were pre-treated with simmondsin and jojoba seed aqueous extract.
• Measurements included cell viability, insulin secretion, ROS levels, caspase-3 activation, p22phox, and Nrf2 levels.

Main Results:

• Fructose exposure significantly reduced cell viability and insulin secretion while increasing ROS production.
• Pre-treatment with simmondsin and jojoba extract notably enhanced cell viability and insulin secretion.
• Both treatments decreased ROS and caspase-3 activation; the aqueous extract also inhibited p22phox and increased Nrf2 levels.

Conclusions:

• Simmondsin and jojoba seed aqueous extract demonstrate significant protective effects against hyperglycemia-induced oxidative stress in pancreatic beta cells.
• Jojoba seed extract, due to its diverse molecular composition, is a potent agent for preventing beta cell destruction.
• These findings highlight the therapeutic potential of jojoba seeds in managing diabetes-related complications.