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Abdominal aortic aneurysm (AAA) is a vascular disease characterized by the weakening of the vascular walls and the progressive dilation of the abdominal aorta. Nicotine, a primary component of cigarette smoke, is associated with AAA development and rupture. Nicotine induces AAA development by weakening vascular walls. However, little is known about preventive methods using functional food factors for nicotine-induced vascular destruction. Sesamin and sesamolin are functional food factors that are fat-soluble lignans found in Sesamum indicum seeds. Previous reports indicated that sesamin and sesamolin have anti-oxidative and anti-inflammatory effects. In this study, we evaluated the effects of sesamin and sesamolin-rich sesame extract on the weakening of vascular walls in nicotine-administered mice. Sesame extract attenuated the degradation of collagen and elastin fibers caused by nicotine. In addition, sesame extract decreased the area positive for matrix metalloproteinase 12 (MMP-12) and oxidative stress in the vascular walls. These results suggest that sesame extract may decrease the weakening of vascular walls by suppressing the nicotine-induced degradation of collagen and elastin fibers. Sesame extract may be effective in preventing AAA development by decreasing both, MMP-12 expression and oxidative stress in vascular walls.

Sesame Extract Attenuates the Degradation of Collagen and Elastin Fibers in the Vascular Walls of Nicotine-administered Mice