Recently we first report that perfluorooctane sulfonate (PFOS) inhibit 11β hydroxysteroid dehydrogenase 2 (11βHSD2) activity in vitro, meanwhile 11βHSD2 is closely related to low birth weight infant (LBWI). We also found that exposure of pregnant rats to PFOS is associated with intrauterine growth restriction, IGF1 downregulation, and decreased cholesterol. LBWI proportion gradually increased in china, which is closely related to the environmental pollutants based on the WHO survey. PFOS,as emerging environmental pollutants,is extensive used in recent years. There is no report about PFOS epidemiological study in china now. Thus the applicant designed this project to be carried out case - control epidemiological studies based on low birth weight infant population, and collect fetal and mother's serum,urine and placenta. In this project we aimed to assess maternal-fetal PFOS exposure, and the relationship among in utero PFOS, GC, IGF1/2 or 11βHSD2 and LBWI in neonates and mothers by LC-MS-MS and ELISA and Bioscan enzymatic assays. We also detect the PFOS level and metabolomics changes of the maternal serum and cord blood in order to provide a scientific basis for the formulation of appropriate laws and regulations.
我们首先报告了全氟辛烷磺酸(PFOS)体外抑制11β羟基类固醇脱氢酶2(11βHSD2)活性。最近发现11βHSD2与低体重出生儿(LBWI)关系密切,同时申请者还报道了PFOS可使仔鼠体内脂类代谢障碍及母鼠胎盘中IGF1含量降低,进而导致新生儿低体重。在我国,LBWI出生比例逐步上升,WHO调查发现其与环境污染物密切相关。PFOS是近几年新出现的环境污染物并被广泛利用。在人群中PFOS与LBWI关系的研究尚未见报道,综合上述发现及国内外研究进展。因此,申请者设计本课题拟开展以LBWI人群为基础的病例-对照研究,收取母体血液、胎盘、尿样和胎儿脐带血及尿样等样本,利用LC-MS-MS、ELISA、酶学、分子生物学等手段检测PFOS、GC、IGF1/2、11β-HSD2及胎盘功能,阐明PFOS等危险因素与LBWI之间的关系,为制定相应的防止环境污染法规提供科学依据。
申请者设计本课题拟开展以LBWI 人群为基础的病例-对照研究,收取母体血液、胎盘、尿样和胎儿脐带血及尿样等样本,利用LC-MS-MS、ELISA、酶学、分子生物学等手段检测PFOS、GC、IGF1/2、11β-HSD2 及胎盘功能,阐明PFOS 等危险因素与LBWI 之间的关系,为制定相应的防止环境污染法规提供科学依据。.(1)对牡丹江地区6县4区进行了自2000年至2012年低体重出生儿的流行病学调查,牡丹江地区低体重出生儿自2000年至2012年总体增长近4倍,6县中穆棱市增长了5倍,绥芬河市增长了4倍,宁安市增长最低达到2倍。4区中东安区增长5倍;.(2)低体重出生儿胎盘11β羟基类固醇脱氢酶2(11βHSD2)酶学活性降低,并且11βHSD2酶学活性与低体重出生儿体重正相关;.(3)miR-124是新近发现的与低体重出生儿密切相关的miRNA,我们对牡丹江地区低体重出生儿母亲血液、胎盘病例收集,并对母亲血液、胎盘组织中小RNA124(miR-124)进行q-PCR检测,发现低体重出生儿母亲血液、胎盘中miR-124水平表达降低;.(4)低体重出生儿胎盘组织中蛋白p38MAPK、ERK、AKT信号通路分析(见图四),低体重出生儿胎盘中p38MAPK、ERK、AKT被激活;.(5)最重要的发现:低体重出生儿胎盘组织中TUNEL凋亡染色分析及凋亡蛋白caspase-3 western-bloting蛋白分析显示低体重出生儿凋亡降低;
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数据更新时间:2023-05-31
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