Garlic oil attenuates the cardiac apoptosis in hamster-fed with hypercholesterol diet

Area of Science:

• Cardiovascular Science
• Nutritional Biochemistry
• Cellular Biology

Background:

• Hypercholesterolemia is a known risk factor for cardiac cell apoptosis.
• Dietary cholesterol significantly impacts cardiac health and cellular integrity.
• Understanding protective mechanisms against diet-induced cardiac damage is crucial.

Purpose of the Study:

• To investigate the cardioprotective effects of garlic oil against hypercholesterolemia-induced cardiac apoptosis.
• To evaluate the impact of garlic oil on apoptotic pathways in the heart.
• To assess the modulation of survival signaling by garlic oil in a hypercholesterolemic model.

Main Methods:

• Golden-Syrian hamsters were fed a control diet, a high-cholesterol diet, or a high-cholesterol diet supplemented with garlic oil for 8 weeks.
• Cardiac apoptosis was assessed using TUNEL staining to quantify apoptotic cells in the left ventricle.
• Expression and activity of key apoptotic and survival proteins, including the IGF-I receptor pathway, were analyzed.

Main Results:

• The high-cholesterol diet significantly increased TUNEL-positive cells and apoptotic proteins in the left ventricle.
• Co-administration of garlic oil markedly reduced cardiac apoptosis compared to the cholesterol-only group.
• Garlic oil reversed the inhibition of the IGF-I receptor-dependent survival pathway observed in the cholesterol group.

Conclusions:

• Garlic oil demonstrates significant protective effects against cardiac apoptosis induced by a hypercholesterolemic diet.
• Garlic oil may exert its cardioprotective effects by modulating apoptotic pathways and restoring survival signaling.
• These findings suggest garlic oil as a potential dietary intervention for managing cholesterol-induced cardiac damage.