Policosanol from Insect Wax Attenuates Atherosclerosis in Mice

Area of Science:

• Biochemistry
• Cardiovascular Science
• Nutritional Science

Background:

• Aging is linked to dyslipidemia and chronic inflammation, increasing atherosclerosis and cardiovascular risk.
• Policosanol from insect wax (PIW), a blend of long-chain aliphatic alcohols, is known to regulate lipid metabolism.
• The specific effects of PIW on atherosclerosis require further investigation.

Purpose of the Study:

• To investigate the preventive effects of PIW on high-fat diet-induced atherosclerosis in ApoE knockout mice.
• To evaluate PIW's impact on lipid profiles, inflammation, and atherosclerotic lesion development.

Main Methods:

• ApoE knockout mice were fed a high-fat diet and concurrently administered PIW (75 and 150 mg/kg) for eight weeks.
• Evaluated weight gain, serum lipid profiles (triglycerides, total cholesterol), and inflammatory biomarkers (IL-6, TNF-α, C-reactive protein).
• Performed histopathological analyses of the liver and aorta, and assessed molecular markers related to atherosclerosis.

Main Results:

• PIW administration reduced weight gain and improved lipid profiles, significantly decreasing triglycerides and total cholesterol.
• PIW lowered circulating inflammatory biomarkers and attenuated hepatic injury.
• PIW reduced aortic lipid deposition, lesion features, serum endothelin-1, and oxidized LDL, while modulating key molecular pathways.

Conclusions:

• PIW demonstrates preventive effects against high-fat diet-induced atherosclerotic features in mice.
• PIW holds potential as a functional food ingredient for promoting cardiovascular health and healthy aging.
• Findings support PIW's role in mitigating dyslipidemia and inflammation associated with aging and atherosclerosis.