The elucidation of the physiological polymorphism related to arteriosclerosis by the approach method from genetic and acquired factor

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We conducted the investigation study related to arteriosclerosis in small remote islands with a population of less than 1,000 and large island with a population of about 40,000 in Goto islands, where the environmental factor was considered to be different. Comparing 205 inhabitants in small islands with 2,520 inhabitants in large island after adjustment for age and sex, plasma homocysteine concentration and carotid intima-media thickness was significantly higher in large island, and plasma folic acid concentration was significantly higher in small island. Because there was not a difference by areas regarding the genetic factor related to the metabolism of folic acid, it was suggested that the physiological polymorphism with acquired factor existed.