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甲醛和苯联合染毒对小鼠胚胎的影响

 喆1,袁 衡1,2,朱 武1,黄 河1,罗晓敏2,*   

  1. ( 1. 中南大学基础医学院组织学与胚胎学系,湖南 长沙 410013;2. 长沙医学院组织胚胎学教研室,湖南 长沙 410219 )
  • 收稿日期:2013-01-28 修回日期:2013-04-17 出版日期:2013-09-30 发布日期:2013-09-30
  • 通讯作者: 罗晓敏,E-mail:sunshine951753@sina.com
  • 作者简介:张 喆 (1987- ),女,天津人,硕士研究生,研究方向:发育生物学。Tel:13973163457;E-mail:zhezhang156@163.com
  • 基金资助:

    湖南省教育厅优秀青年基金 ([2009]75-09B015),国家自然科学基金 (81141068),湖南省自然基金 (12JJ3023),中南大学贵重仪器设备开放共享基金 (CSUZC2013035)

Effects of joint exposure to formaldehyde and benzene on mice embryos
 

ZHANG Zhe1YUAN Heng1,2,ZHU Wu1,HUANG He1,LUO Xiao-min2,*   

  1. (1. Department of Histology and Embryology, College of Basic Medicine, Central South University, Changsha 410013; 2. Department of Histology and Embryology, Changsha School of Medicine, Changsha 410219, Hunan, China)
  • Received:2013-01-28 Revised:2013-04-17 Online:2013-09-30 Published:2013-09-30
  • Contact: LUO Xiao-min,E-mail:sunshine951753@sina.com

摘要:

目的: 研究甲醛和苯联合染毒对小鼠胚胎发育的影响。方法:将昆明孕鼠随机分为4组,每组10只。胚胎植入后进行不同浓度的甲醛和苯联合染毒,分别为对照组 (甲醛0 mg/m3、苯0 mg/m3)、低剂量组[甲醛 (0.10±0.01) mg/m3、苯 (0.11±0.01) mg/m3]、中剂量组[甲醛 (5.00±0.30) mg/m3、苯 (5.50±0.40) mg/m3]、高剂量组[甲醛 (10.00±0.50) mg/m3、苯 (11.00±0.50) mg/m3],每天染毒2 h,持续15 d。观察孕鼠一般情况,记录其生产情况及24 h存活仔鼠数目;称量仔鼠体质量、肝脏质量;并提取仔鼠肝脏总RNA,采用RT-PCR检测肝细胞中细胞周期调控基因Cdk2、CyclinE、Cdk7、CyclinH的表达情况。结果:高剂量组孕鼠平均体质量低于其余各组 (P<0.05),孕鼠、流产孕鼠数高于其他各组 (P<0.05),此外,高剂量组孕鼠产仔数及24 h存活仔鼠数也低于其他剂量组,差异均具有统计学意义 (P<0.05)。细胞周期调控基因Cdk2在中剂量组、高剂量组的表达高于对照组与低剂量组,CyclinE在高剂量组的表达高于其余各组,差异具均有统计学意义 (P<0.05)。Cdk7、CyclinH在各组中表达的差异均无统计学意义 (P>0.05)。结论:小鼠胚胎植入后,甲醛和苯联合可导致流产增加及胎鼠存活率降低,并引起仔鼠肝细胞中细胞周期调控异常。

关键词: 苯, 甲醛, 细胞周期, 胚胎, 发育

Abstract:

OBJECTIVE: To study the combined effects of formaldehyde and benzene on the development of mice embryo after implantation. METHODSPregnant mice were randomly divided into four groups and exposed to different concentrations of formaldehyde and benzene starting from embryo implantation for 15 days. The concentrations of formaldehyde and benzene were 0 mg/m3 of formaldehyde and 0 mg/m3 of benzene for control group,(0.10±0.01) mg/m3 of formaldehyde and (0.11±0.01) mg/m3 of benzene for low dose group,(5.00±0.30) mg/m3 of formaldehyde and (5.50±0.40) mg/m3 of benzene for medium dose group,(10.00±0.50) mg/m3 of formaldehyde and (11.00±0.50) mg/m3 of benzene for high dose group. The general condition of pregnant mice,number of newborns as well as 24-hour survival of newborns were recorded. The body weight of newborns along with liver weight were also recorded to calculate liver coefficient. Total RNA was extracted from liver to detect the expression of cell cycle regulatory genes,Cdk2, CyclinE,Cdk7,CyclinH,by RT-PCR. RESULTSThe average weight of pregnant mice in high dose group was lower than the remaining groups (P<0.05) while the number of abortion was higher (P<0.05). In addition,the number of newborns and 24-hour survival of newborns in the high dose group were also lower than other dose groups,and the difference was statistically significant (P<0.05).The expression of Cdk2 in the medium and high dose groups were stronger than that in control group and low dose group. Besides,the expression of CyclinE in high dose groups was stronger than any other groups. The difference was statistically significant (P<0.05). The expressions of Cdk7 and CyclinH were not statistically significant (P>0.05) among the groups. CONCLUSION:Exposure of pregnant mice to formaldehyde and benzene after implantation could lead to abortion,the reduction of newborns and their survival. It could also cause hepatocyte cell cycle regulation abnormalities in newborn mice

Key words: benzene, formaldehyde, cell cycle, embryo, development