Summary
Although many epidemiological studies have shown an association between hyperfibrinogenemia
and atherosclerosis, it is not established whether elevated fibrinogen has an etiological
role in the pathogenesis or is only a reflection of the ongoing disease.
We have studied the contribution of fibrinogen to the development of atherosclerosis
in atherosclerosis-prone ApoE*3-Leiden mice that have been cross-bred with transgenic
mice overexpressing fibrinogen. Genetic compound offspring were used to evaluate the
progression of atherosclerotic lesions after being fed an atherogenic diet for 7 weeks.
It was observed that the lesion area of the plaques as well as the severity of the
lesions in the aortic valve was comparable in control single transgenic ApoE*3-Leiden
mice and in double transgenic apoE*3-Leiden mice overexpressing fibrinogen. No thrombus
or fibrin deposition was observed in atherosclerotic lesions in either group of mice.
These results indicate that elevated plasma fibrinogen concentrations in ApoE*3-Leiden
transgenic mice do not affect the progression of diet-induced atherosclerotic lesions.
Keywords
Atherosclerosis - fibrinogen overexpression - transgenic mouse