Tetrahydrocurcumin Enhances Islet Cell Function and Attenuates Apoptosis in Mouse Islets

Area of Science:

• Immunology
• Endocrinology
• Cell Biology

Background:

• Pancreatic islet transplantation is a potential therapy for diabetes.
• Curcumin and its metabolite Tetrahydrocurcumin (THC) exhibit anti-inflammatory and antioxidant properties.
• This study investigated THC's protective effects on islets prior to transplantation.

Purpose of the Study:

• To determine if preoperative Tetrahydrocurcumin (THC) treatment can reduce ischemic damage and apoptosis in pancreatic islets.
• To evaluate the impact of THC on islet viability and function in vitro and after cytokine exposure.

Main Methods:

• Islets were cultured with or without THC.
• In vitro islet viability and function were assessed.
• Islets were exposed to a cytokine cocktail, and apoptosis-related proteins were analyzed in INS-1 cells.

Main Results:

• THC-treated islets showed 1.3-fold higher glucose-induced insulin secretion.
• THC improved glucose-induced insulin release and nitric oxide (NO) production after cytokine challenge.
• Apoptosis was significantly reduced, and B-cell lymphoma-2 (an anti-apoptotic protein) was elevated in THC-treated islets.

Conclusions:

• Preoperative THC administration enhances islet function and viability.
• THC attenuates cytokine-induced damage and apoptosis, suggesting a protective role in islet transplantation.