癌变·畸变·突变 ›› 1999, Vol. 11 ›› Issue (5): 249-251.doi: 10.3969/j.issn.1004-616x.1999.05.016

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铅对胎鼠中脑细胞增殖和分化的影响

符绍莲 李 宏   

  1. 北京医科大学妇幼卫生学系 北京 100083
  • 收稿日期:1999-07-05 修回日期:1999-09-15 出版日期:1999-09-30 发布日期:1999-09-30

EFFECTS OF LEAD ON RAT EMBRYO MIDBRAIN CELL PROLIFERATION AND DIFFERENTIATION

Fu Shaolian , Li Hong   

  1. Department of Maternal and Chil d Heal th , Beijing Medical University , Beijing  100083
  • Received:1999-07-05 Revised:1999-09-15 Online:1999-09-30 Published:1999-09-30

摘要: 目的:研究铅对胎脑神经细胞增殖和分化的影响,为进一步揭示其脑发育毒性作用机理提供依据。方法:应用大鼠胚胎中脑细胞微团培养法,观察不同浓度的醋酸铅对胚胎脑细胞增殖和分化的影响。结果:醋酸铅对体外培养的中脑细胞的增殖和分化均有抑制作用,并均有明显的浓度- 效应关系。醋酸铅的神经细胞半数增殖抑制浓度( ICp50) 为3. 69μmol/ L ,半数分化抑制浓度( ICd50) 为1. 03μmol/ L 。结论:按Flint 评价标准,醋酸铅是脑细胞分化的特异抑制剂,它的脑细胞发育毒性与抑制细胞的增殖和分化有关。

关键词: 铅, 胚胎中脑神经细胞, 微团培养, 发育毒性, 大鼠

Abstract: Objective :To study the brain developmental toxicity of lead and it s relationship with cell proliferation and differentiation. Method :The rat embryonic midbrain micromass cult rue method was used to observe the effect of PbAc on brain cells proliferation and differetiation. Restults :The proliferation and differetiation of cultured cells were both inhibited by PbAc , and both effect s showed obvious dose2dependent decreases( P < 0. 05) . Concent rations of lead to inhibit cell proliferaion and differentiation by 50 % were 3. 69μmol ( ICp50) and 1. 03μmol ( ICd50) respectively. Conclusion :According to the standard of Flint , PbAc can be a specific inhibitor of rain cell differentiation , it s brain cell developmental toxicity is related to the inhibition of cell proliferation and ifferentiation.

Key words: Lead, Embryo midbrain neural cell, Micromass culture, Developmental toxicity, Rat