Erectile dysfunction in hypercholesterolemic atherosclerotic apolipoprotein E knockout mice.

Area of Science:

• Cardiovascular Research
• Erectile Dysfunction Pathophysiology
• Atherosclerosis Modeling

Background:

• Erectile dysfunction (ED) and cardiovascular diseases share common risk factors.
• Hypercholesterolemic rabbit models are useful but costly for studying ED and hypercholesterolemia.
• Limitations in current models necessitate the development of new, cost-effective alternatives.

Purpose of the Study:

• To develop a novel model of atherosclerosis-associated ED using apolipoprotein E knockout (ApoE KO) mice.
• To establish a well-characterized experimental model for atherosclerosis research.
• To investigate the link between atherosclerosis and ED in a mouse model.

Main Methods:

• ApoE KO mice and C57BL6/J mice were fed a Western-type diet.
• Erectile function was assessed via intracavernous pressure measurements after cavernous nerve stimulation.
• Atherosclerotic lesion development was quantified using aortic planimetry.

Main Results:

• ApoE KO mice exhibited significant atherosclerotic lesions in the aorta, increasing with age (22% at 26 weeks to 35% at 38 weeks).
• Erectile responses were markedly impaired in 26-week-old ApoE KO mice compared to controls.
• This erectile dysfunction persisted in older ApoE KO mice, correlating with atherosclerosis progression.

Conclusions:

• ApoE KO mice provide a suitable model for studying atherosclerosis-associated ED.
• This model can be used to investigate therapeutic strategies targeting both atherosclerosis and ED.
• The ApoE KO mouse model offers a valuable tool for cardiovascular research.