血清维生素B12水平对产妇及新生儿IGF2 DNA甲基化的影响The relationship of serum vitamin B12 and insulin-like growth factor-Ⅱ in maternal and cord blood
李娜,张志强,刘付东,马强,巴月
摘要(Abstract):
目的评价健康产妇血清维生素B12水平对胎儿甲基化状态的影响。方法对河南省侯寨乡中心卫生院80例临产产妇进行回顾性健康问卷调查;采用顺磁性颗粒化学发光免疫法测定血清维生素B12含量;real time-PCR分析IGF2 P2、P3启动子区甲基化状态。结果母亲与脐血血清维生素B12水平分别为167.68 pg/m L和205.98 pg/m L,两组之间差异具有统计学意义(P<0.05)。母血IGF2 P2甲基化率均值为3.03%,脐血3.84%,脐血IGF2 P2甲基化率高于母血IGF2 P2甲基化率(P<0.05)。母血IGF2 P3甲基化率均值为5.58%,脐血为4.35%,母血IGF2 P3甲基化率高于脐血IGF2 P3甲基化率(P<0.05)。脐血IGF2 P3的甲基化状态与母血IGF2P3的甲基化状态呈正相关(β=0.423,P=0.000 5),同时与母血维生素B12水平呈负相关(β=-0.211,P=0.006 9),与母亲受教育程度呈正相关(β=0.185,P=0.038)。母血IGF2 P2的甲基化状态与母血维生素B12水平呈负相关(β=-0.213,P=0.016),与母亲被动吸烟(β=0.310,P=0.022)和孕期增重(β=0.362,P=0.019)呈正相关。结论环境因素可影响母亲外周血及脐血DNA甲基化水平。
关键词(KeyWords): 产妇;胎儿;维生素B12;IGF2;DNA甲基化
基金项目(Foundation):
作者(Author): 李娜,张志强,刘付东,马强,巴月
DOI: 10.13515/j.cnki.hnjpm.1006-8414.2018.03.006
参考文献(References):
- [1]訾晓渊,熊俊,胡以平.基因印记及其生物学意义[J].中国科学基金,2001,2:68-71.
- [2]Jonen E K.Plasma and red cell folate value newborn infant and their mother in relation to gestational age[J].Pedia Tries,1990,81(2):188.
- [3]Beeghly AC,Katsaros D,Wiley AL,et al.IGF-II promoter methylation and ovarian cancer prognosis[J].J Cancer Res Clin Oncol,2007,133(7):13-23.
- [4]Lingeng Lu,Dionyssios Katsaros,Irene A.Rigault de la Longrais,et al.Hypermethylation of let-7a-3 in Epithelial Ovarian Cancer Is Associated with Low Insulin-like Growth Factor-ⅡExpression and Favorable Prognosis[J].Cancer Res,2007,67(21):17-22.
- [5]尹国武,杨梦庚,王金声,等.产妇血清脐血及乳汁中叶酸和维生素B12水平测定及意义[J].中国实用妇科与产科杂志,1997,13(5):278-280.
- [6]蒋文跃,韩巍,李志新.成人疾病胎源学说的证据及机制[J].北京大学学报,2007,39(1):96-100.
- [7]Reik W,Constancia M,Fowden A,et al.Regulation of supply and demand formaternal nutrients in mammals by imp rinted genes[J].J Physiol,2003,547:35-44.
- [8]Sussenbach J,Steenbergh PH,Holthuizen P,et al.Structure and expression of the human insulin-like growth factor genes[J].Growth Megual,1992,(2):165-170.
- [9]张农.人肝癌中IGF2表达与基因印迹异常调控的关系[J].上海医科大学学报,1999,26(2):79-82.
- [10]Beeghly AC,Katsaros D,Wiley AL,Rigault de la Longrais A,Prescott AT,Chen H,Puopolo M,Rutherford TJ,Yu H(2007)IGF-II promoter methylation and ovarian cancer prognosis[J].J Cancer Res Clin Oncol,2007,133(7):713-723.