毒理性
这项研究调查了在大鼠中,通过注射金属补充剂对水杨酸盐致畸性的影响。在怀孕的第8、9和10天,分别通过腹腔注射给予硫酸亚铁(16 mg/kg)、硫酸锰(10 mg/kg)、硫酸铜(6 mg/kg)或去离子水。在第9天,金属盐处理后1小时,通过口服给予水杨酸钠(250或300 mg/kg)或去离子水。结果显示,锰显著增强了水杨酸盐的致畸效果,铁增强了水杨酸盐的效果,但程度不如锰,而铜对水杨酸盐的致畸性几乎没有影响。锰和铁在给予水杨酸盐处理6小时后,显著增加了胚胎和母体血浆中的总水杨酸盐浓度。没有发现对水杨酸盐与血浆蛋白结合的干扰。在40天大的后代中,研究了可能的水杨酸盐-金属相互作用的产后效果,这些动物在怀孕的第8、9和10天接受了125 mg/kg阿司匹林的口服和16 mg/kg硫酸亚铁的腹腔注射。与对照组相比,阿司匹林-铁和阿司匹林组在探索活动增加和平均体重方面都有所观察,但只有同时暴露于阿司匹林和铁的动物迷宫学习能力受损。通过注射金属盐补充剂增强水杨酸盐的产前和产后效果表明,水杨酸盐与金属在母体循环中存在相互作用,并提示螯合作用是水杨酸盐致畸作用的一种机制。
The effects of parenteral metal supplements of salicylate teratogenicity were studied in rats. Ferrous gluconate (16 mg/kg), manganous sulfate (10 mg/kg), cuprous sulfate (6 mg/kg), or deionized water were given ip on days 8, 9, and 10 of gestation. Sodium salicylate (250 or 300 mg/kg) or deionized water was administered /orally/ on day 9, 1 hr after the metal-salt treatment. Mn significantly enhanced the teratogenic effect of salicylate, Fe potentiated the salicylate effect but to a lesser extent than Mn, and Cu has little or no effect on salicylate teratogenicity. Mn and Fe significantly increased total salicylate concentration in both embryos and maternal plasma at 6 hr after salicylate treatment. No interference with plasma protein binding of salicylate could be detected. Postnatal effects of possible salicylate-mental interactions were studied in 40 day old offspring of animals treated with 125 mg/kg aspirin /orally/ and 16 mg/kg ferrous gluconate ip on days 8, 9, and 10. Increased exploratory activity and mean body weight were observed in both the aspirin-Fe and aspirin groups relative to vehicle controls, but maze learning was impaired only in animals exposed to both aspirin and Fe. The potentiation of the pre- and postnatal effects of salicylate by parenteral mental-salt treatment implies a salicylate-mental interaction in the maternal circulation and suggests chelation as a mechanism of the teratogenic action of salicylate.
来源:Hazardous Substances Data Bank (HSDB)