胎儿宫内多环芳烃暴露水平及其母婴暴露关系研究

目的了解胎儿宫内多环芳烃(PAHs)暴露水平,并探讨母婴暴露关系。方法于2006年10月至2008年1月在太原市两所二级甲等医院中随机调查符合条件的347名孕产妇,进行流行病学调查和生物样品的收集,其中母婴匹配的有271对用于本次分析。采用改进的高效液相色谱法测定母亲外周静脉血及新生儿脐带血中7种PAHs水平。结果可供检测的271对血清样本中,芘及苯并(a)蒽的检出率分别为母90.94%和脐79.34%;母95.97%和脐85.03%,其余4种致癌性PAHs的检出率均在50%～70%左右。脐带血苯并(k)荧蒽(P=0.002)、苯并(a)芘(P=0.002)、二苯并(a,h)蒽(P<0.001)水平均高于母血清,差异有统计学意义。此外,新生儿血清中苯并(b)荧蒽浓度要稍高于母亲,但差异没有统计学意义(P=0.075)。结论新生儿脐带血中可检出多种致癌性多环芳烃,并且脐带血中PAHs水平与母体相当甚至高于母体水平。

Relationship of PAHs levels in umbilical cord blood and the PAHs exposure between the mother and the paired newborns

Objective To determinate the present polycyclic aromatic hydrocarbons (PAHs) levels in cord blood in order to discuss the PAHs exposure relationships between mother and paired newborns.Methods 347 pregnant women joined the study and the information of the 271 paired mother- newborns were used to analysis the exposure relationship. Questionnaire and bio-samples were got during the period of October 2006 to January 2008. High-performance liquid chromatography (HPLC) was used to determine the PAHs(7 kinds)levels in cord blood and maternal blood. Results In the 271 paired mother/newborns, several kinds of PAHs were detected in nearly all the serum of the subjects. The serum concentrations of B(k)F, B(a)P and DB(a,h)A in cord blood were significantly higher than those in paired maternal blood. In addition, the serum concentrations of B(b)F in cord blood was higher than that in maternal blood (P>0.05). Conclusion There are several kinds of PAHs detected in the umbilical cord blood and the PAHs levels in cord blood is the same as or even higher than that in the maternal blood, which means that could be is very important to develop the prenatal exposure assessment