Both AD and paraoxonase (PON) have been reported to be related to lipids an
d atherosclerosis, suggesting that the PON gene (PON) is a possible genetic
risk factor for AD. We found no association of PON polymorphism with sever
ity of atherosclerosis, densities of AD-type, neuropathologic change, or de
velopment of AD in 47 AD and 90 nondemented patients. Our study suggests th
at PON polymorphism does not play a. causal role in the development of athe
rosclerosis or AD.