实验性苯中毒对骨髓红细胞微核改变的意义

目的 探讨苯的不同给药浓度对骨髓红细胞微核改变的影响,拟建立一种理想的苯中毒模型,为进一步苯的实验研究奠定基础.方法 昆明种小鼠50只,随机分为5组:1个对照组,4个实验组,每组10只.对照组单纯皮下注射生理盐水,实验组在每周一、三、五皮下注射苯制剂,并按所给苯剂量分为B1组(0.5 ml/kg体重)、B2组(1.0 ml/kg体重)、B3组(1.5 ml/kg体重)、B4组(2.0 ml/kg体重),各实验组分别于给苯前及给苯1、2.3、4周后称重动物,检测外周血及骨髓中红细胞微核的变化等指标.结果 ①与对照组相比,实验组小鼠白细胞、血红蛋白、血小板三项指标B1、B2组只部分指标改变,B3、B4组在给苯4周后全部指标与对照组相比差异有统计学意义(P均<0.05).②实验组小鼠外周血及骨髓红细胞微核率随着苯注射时间的延长呈现一定的上升趋势,在第3周出现高峰后,第4周下降.③第4周各实验组与对照组比较,小鼠骨髓嗜多染红细胞微核率明显上升,且差异有统计学意义(P均<0.05).结论 苯中毒可以导致小鼠外周血成熟红细胞和骨髓嗜多染红细胞微核率的增高,以此可作为检测骨髓红细胞受抑状态.

Effect of experimental benzolism on marrow erythrocyte micronucleus

Objective To investigate the effect of experimental benzolism on marrow eryghrocyte micromucleus.Methods Fifty male KunMingmice(KM)were randomly divided into 5 groups:one control group and four experimental groups with 10 mice in each group.The mice were injected subcutaneously with sodium chloride in control group and benzene in experimental groups on every Monday,Wednesday and Friday for four weeks.Four experimental groups were injected with a dosage of 0.5 ml/kg(group B1),1.0 nd/kg(group B2),1.5 ml/kg(group B3) and 2.0 ml/ks(group B4),respectively.Before and after injection of sodium chloride or benzene weekly.weight was measured,and the alteration of erythrocyte micronucleus in peripheral blood and marrow were detected.Results ① Compared to the control group,several indices were partly changed in B1 and B2 groups,while all indices changed significantly in group B3 and B4 groups four weeks after injection(P<0.01).②The erythrocyte micronucleus rate of experimental mice in peripheral blood and marrow showed ascending tendency with the extension of benzene injection phase,peak emerged in the third week and decreased in the fourth week.③In the 4th week,compared to the control group,the alteration of erythrocyte micronucleus in marrow in all experimental groups were significantly increaged(P<0.05).Conclusions Benzolism may induce the increasing of micronucleus rate of mature erythrocyte in peripheral blood and erythrocyte in marrow.which can be used to detect status of being restrained in marrow erythrocyte series.