高锰对雌性仔鼠大脑发育的影响

Effects of high manganese on cerebral development of the offspring of rats

用不同锰含量的饮水（分别为２和１０ｇ／Ｌ）使孕鼠染锰，研究对子代大脑发育的影响。结果表明：（１）高剂量染锰组仔鼠大脑额叶和顶叶皮质厚度比低剂量组和对照组显著变薄，而胶质细胞纤维酸蛋白（ｇｌｉａｌｆｉｂｒｉｌａｒｙａｃｉｄｐｒｏｔｅｉｎ，ＧＦＡＰ）免疫反应强度及其阳性反应产物平均相对密度均明显增高；（２）高、低剂量染锰组仔鼠的扣带回皮质厚度显著较对照组增厚，ＧＦ－ＡＰ反应强度及其阳性反应产物相对密度显著升高；（３）高剂量染锰组仔鼠胼胝体的面积较对照组和低剂量组显著增大，ＧＦＡＰ免疫反应及其阳性反应产物相对密度明显增高，而低剂量组与对照组之间无差异。

Pregnant rats were divided into three groups. Two groups are exposed to manganese from drinking water contaminated with manganese in 10 and 2g/L respectively. Cerebral development of the offspring of rats was studied. The results are as follows. (1) The thickness of frontal and parental cortex of high dose Mn exposed groups was significantly reduced, but glial fibrillary acid protein (GFAP) and the densities of its products were increased. (2) Cingular cortex was thickened, GFAP and the density of its products of cingular cortex was increased in both Mn exposed groups compared with the control group. (3) The area, GFAP and the densits of its products of corpus callosium in the high Mn exposed group were significantly increased compared with those in both low Mn exposed and control groups.