DNA methylation signatures of adolescent victimization: analysis of a longitudinal monozygotic twin sample.

DNA methylation signatures of adolescent victimization: analysis of a longitudinal monozygotic twin sample.
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DOI:
10.1080/15592294.2020.1853317
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发表时间:
2021-11
期刊:
影响因子:
3.7
通讯作者:
Wong CCY
Wong CCY
中科院分区:
生物学3区
文献类型:
--
作者:
Kandaswamy R;Hannon E;Arseneault L;Mansell G;Sugden K;Williams B;Burrage J;Staley JR;Pishva E;Dahir A;Roberts S;Danese A;Mill J;Fisher HL;Wong CCY

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越来越多的证据表明,在关键发育阶段遭受受害的个体与没有/最小压力事件的个体相比可能具有不同的表观遗传指纹,但结果尚无定论。本研究旨在通过控制遗传变异、年龄、性别和共同环境暴露,加强青少年受害对表观基因组影响的因果推断。我们使用 5、10 和 18 岁时收集的口腔 DNA 和 Illumina EPIC 阵列,对来自环境风险研究的 118 对同卵 (MZ) 双胞胎的 DNA 甲基化 (DNAm) 图谱进行了纵向表观基因组关联分析 (EWAS),这些双胞胎有或没有严重青少年受害情况。此外,我们对同一个体的 18 岁血液和口腔 DNA 进行了横断面 EWAS,以阐明青少年严重受害的组织特异性特征。我们的分析确定了 20 个提示性差异甲基化位置 (DMP) (P < 5e-05),其 DNAm 轨迹在 10-18 岁之间发生变化,与严重的青少年受害相关(ΔBeta 范围=−5.5%−5.3%)。 18 岁横断面分析显示 72 份血液(ΔBeta 范围=−2.2%−3.4%)和 42 份口腔(ΔBeta 范围=−3.6%−4.6%)提示与青少年受害相关的严重 DMP,并有一些证据表明这两种组织类型之间存在汇聚信号。下游区域分析分别在 18 岁血液和口腔 EWAS 中确定了 LGR6 和 ANK3(Šidák P = 5e-09 和 4.07e-06)中的显着差异甲基化区域(DMR)以及 CCL27 上游的一个(Šidák P = 2.80e-06)。我们的研究代表了对 DNAm 和严重青少年受害的首次纵向同卵双胞胎分析,为遭受青少年受害的个体中 DNA 甲基组学特征的改变提供了初步证据。
Accumulating evidence suggests that individuals exposed to victimization at key developmental stages may have different epigenetic fingerprints compared to those exposed to no/minimal stressful events, however results are inconclusive. This study aimed to strengthen causal inference regarding the impact of adolescent victimization on the epigenome by controlling for genetic variation, age, gender, and shared environmental exposures. We conducted longitudinal epigenome-wide association analyses (EWAS) on DNA methylation (DNAm) profiles of 118 monozygotic (MZ) twin pairs from the Environmental Risk study with and without severe adolescent victimization generated using buccal DNA collected at ages 5, 10 and 18, and the Illumina EPIC array. Additionally, we performed cross-sectional EWAS on age-18 blood and buccal DNA from the same individuals to elucidate tissue-specific signatures of severe adolescent victimization. Our analyses identified 20 suggestive differentially methylated positions (DMPs) (P < 5e-05), with altered DNAm trajectories between ages 10–18 associated with severe adolescent victimization (∆Beta range = −5.5%−5.3%). Age-18 cross-sectional analyses revealed 72 blood (∆Beta range = −2.2%−3.4%) and 42 buccal (∆Beta range = −3.6%−4.6%) suggestive severe adolescent victimization-associated DMPs, with some evidence of convergent signals between these two tissue types. Downstream regional analysis identified significant differentially methylated regions (DMRs) in LGR6 and ANK3 (Šidák P = 5e-09 and 4.07e-06), and one upstream of CCL27 (Šidák P = 2.80e-06) in age-18 blood and buccal EWAS, respectively. Our study represents the first longitudinal MZ twin analysis of DNAm and severe adolescent victimization, providing initial evidence for altered DNA methylomic signatures in individuals exposed to adolescent victimization.
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