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Hypertension:糖尿病妊娠或可诱导Srebf2基因表观遗传变化,从而导致胎儿生长受限

2018-04-03 MedSci MedSci原创

糖尿病妊娠与后代完全由表观遗传介导的代谢和神经疾病的患病风险增高相关。目前,对于糖尿病妊娠胎儿所发生的表观遗传改变,我们知之甚少。Michaela Golic等人尝试阐述已存在的母体糖尿病之后的围产期环境,并探究胎儿所发生的相关表观遗传学改变。经前期工作,研究人员将重点放在调控胆固醇代谢的主基因——转录因子Srebf2(固醇调节元件结合转录因子2)上。研究人员对糖尿病妊娠是否诱导Srebf2启动子

糖尿病妊娠与后代完全由表观遗传介导的代谢和神经疾病的患病风险增高相关。目前,对于糖尿病妊娠胎儿所发生的表观遗传改变,我们知之甚少。
Michaela Golic等人尝试阐述已存在的母体糖尿病之后的围产期环境,并探究胎儿所发生的相关表观遗传学改变。

经前期工作,研究人员将重点放在调控胆固醇代谢的主基因——转录因子Srebf2(固醇调节元件结合转录因子2)上。研究人员对糖尿病妊娠是否诱导Srebf2启动子区发生表观遗传学改变以及其是否在Srebf2基因表达水平改变中显现出来进行探究。

研究人员建立一2型糖尿病的转基因大鼠模型(Tet29),并通过多西环素(腹腔注射,Tet29和野生对照)诱导的RNA干扰敲低胰岛素受体的表达。仅注射多西环素的Tet29鼠表现为高血糖、高胰岛素血症和高脂血症。用qPCR检测基因表达、焦磷酸测序分析CpG启动子甲基化。对胎脑进行免疫组化。患糖尿病的Tet29的胎儿在妊娠末期表现为高血糖和生长受限,同时伴随肝脏和大脑重量减轻、海马内小胶质神经细胞活性下降。此外,糖尿病妊娠诱导胎儿肝脏和大脑的Srebf2启动子的CpG岛超甲基化,而CpG岛超甲基化会降低Srebf2基因的表达。

总而言之,糖尿病和高脂性妊娠可诱导大鼠胎儿发生神经、代谢和表观遗传改变。Srebf2是一潜在的介导子宫内环境驱动胎儿发生表观遗传改变的候选基因。

原始出处:

Michaela Golic, et al.Diabetes Mellitus in Pregnancy Leads to Growth Restriction and Epigenetic Modification of the Srebf2 Gene in Rat Fetuses.Hypertension. April 2,2018.https://doi.org/10.1161/HYPERTENSIONAHA.117.10782

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