JAMA Pediatr:孕期高PM2.5导致新生儿端粒缩短

2017-10-17 zhangfan MedSci原创

研究认为,妊娠期处于高PM2.5环境中会导致新生儿端粒长度缩短,是可能影响新生儿寿命的重要产前因素

端粒长度是生物老化的标志,反映细胞处于氧化应激和炎症状态的程度。出生时端粒长度与预期寿命有关。近日研究人员通过脐带血和胎盘端粒长度来评估产前大气颗粒物(PM)与新生儿端粒长度的关系。

研究招募了730名孕37周以上的新生儿母亲,记录母体家庭中可入肺颗粒物PM2.5浓度。在胎儿出生后,采集新生儿脐带血和胎盘组织进行相对端粒长度测定。使用高分辨率时空插值的方法估计怀孕期间孕产妇居住的PM2.5暴露量。在分布滞后模型中,考察脐带血和胎盘端粒长度与孕期平均每周PM2.5暴露剂量的关系。

在641名新生儿中,脐带血(孕12-25周)和胎盘(孕15-27周)的端粒长度与妊娠中期可入肺颗粒物暴露成显著负相关。整个妊娠期间可入肺颗粒物暴露量每增加5μg/m3,脐血白细胞端粒长度缩短8.8%(95%,CI,3.1-14.1%),胎盘细胞端粒长度缩短13.2%(95%,CI,6.7-19.3%),该相关性在调整了分娩日期、胎龄、母体体重指数、产妇年龄、父亲年龄、新生儿性别、新生儿种族、分娩季节、胎次、母亲吸烟状况、母亲教育程度、妊娠并发症和环境温度后仍显著。

研究认为,妊娠期处于高PM2.5环境中会导致新生儿端粒长度缩短,是可能影响新生儿寿命的重要产前因素。

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    2018-08-02 feather89
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    2017-10-20 wxl882001

    学习一下

    0

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