鉛の脳内分布-特に生体必須金属 (鉄, 銅, 亜鉛) との関係について

概要

論文の詳細を見る
In order to determine both the distributional variation of heavy metals and the relationship between lead and essential metals in rats poisoned by lead, a study was undertaken using atomic absorption spectrophotometry.The cerebral lead concentration increased according to the amount of lead administered. The distribution patterns of lead in seven regions of the brain were significantly different between lead-treated animals and controls. In the latter, the differences in lead concentration among the individual regions were statistically significant, with the lowest levels reported for the cortex. In contrast, the cortex and hippocampus had the higher concentration in rats to which 45μg/g or 90μg/g of lead had been administered. Those given 180μg/g body weight showed uniform accumulations in all cerebral regions.Iron concentrations were highest in the hippocampus, while zinc and copper concentrations were distributed almost uniformly. No statistically signigicant loss of essential elements was recorded from the brains of lead-treated animals, but significant decreases of copper from the liver and of iron from the whole blood were found.