Cardiovascular autonomic imbalance and baroreflex dysfunction in the apolipoprotein E-deficient mouse

Area of Science:

• Cardiovascular Research
• Animal Models
• Atherosclerosis Research

Background:

• Genetically engineered mouse models, particularly the apolipoprotein E-deficient (apoE(-/-)) mouse, are vital for studying cardiovascular disease.
• The apoE(-/-) mouse spontaneously develops hypercholesterolemia and atherosclerotic lesions analogous to human conditions.
• Understanding autonomic control of cardiovascular function in this model is essential.

Purpose of the Study:

• To review autonomic nervous system abnormalities in apoE(-/-) mice regarding cardiovascular control.
• To highlight baroreflex dysfunction in the context of hypercholesterolemia and atherosclerosis.
• To examine the influence of nitric oxide, reactive oxygen species, aging, and diet on this dysfunction.

Main Methods:

• Literature review of studies utilizing the apoE(-/-) mouse model.
• Analysis of research on autonomic nervous system function (parasympathetic and sympathetic).
• Examination of baroreflex sensitivity and its modulators in apoE(-/-) mice.

Main Results:

• ApoE(-/-) mice exhibit significant abnormalities in sympathetic and parasympathetic control of heart rate and blood pressure.
• Baroreflex control of cardiovascular function is impaired in this model.
• Nitric oxide, reactive oxygen species, aging, and atherogenic diets exacerbate autonomic dysfunction.

Conclusions:

• The apoE(-/-) mouse is a valuable model for investigating atherosclerosis-related autonomic dysfunction.
• Dysregulation of the autonomic nervous system significantly impacts cardiovascular control in hypercholesterolemic and atherosclerotic conditions.
• Further research is needed to elucidate the precise mechanisms and therapeutic targets.