First name
Alexandra
Middle name
E
Last name
Dereix

Title

Pregnancy-associated changes in cervical noncoding RNA.

Year of Publication

2020

Number of Pages

1013-1025

Date Published

2020 06

ISSN Number

1750-192X

Abstract

<p>To identify pregnancy-associated changes in cervical noncoding RNA (ncRNA), including miRNA and long noncoding RNA (lncRNA), and their potential effects on biologic processes. We enrolled 21 pregnant women with term deliveries (≥37&nbsp;weeks' gestation) in a prospective cohort and collected cervical swabs before 28&nbsp;weeks' gestation. We enrolled 21 nonpregnant controls. We analyzed miRNA, lncRNA and mRNA expression, applying a Bonferroni correction. Five miRNA and three lncRNA were significantly differentially (&gt;twofold change) expressed. Putative miRNA targets are enriched in genes mediating organogenesis, glucocorticoid signaling, cell adhesion and ncRNA machinery. Differential cervical ncRNA expression occurs in the setting of pregnancy. Gene ontology classification reveals biological pathways through which miRNA may play a biologic role in normal pregnancy physiology.</p>

DOI

10.2217/epi-2019-0231

Alternate Title

Epigenomics

PMID

32808540

Title

Maternal anxiety and depression in pregnancy and DNA methylation of the glucocorticoid receptor gene.

Year of Publication

2020

Date Published

2020 Nov 20

ISSN Number

1750-192X

Abstract

<p><strong>Aim:&nbsp;</strong>To quantify associations of anxiety and depression during pregnancy with differential cord blood DNA methylation of the glucorticoid receptor (<em>NR3C1</em>). <strong>Materials &amp; methods:&nbsp;</strong>Pregnancy anxiety, trait anxiety and depressive symptoms were collected using the Pregnancy Related Anxiety Scale, State-Trait Anxiety Index and Edinburgh Postnatal Depression Scale, respectively. <em>NR3C1&nbsp;</em>methylation was determined at four methylation sites. <strong>Results:</strong>&nbsp;DNA methylation of CpG 1 in the <em>NR3C1&nbsp;</em>CpG island shore&nbsp;was higher in infants born to women with high pregnancy anxiety (β 2.54, 95% CI: 0.49-4.58) and trait anxiety (β 1.68, 95% CI: 0.14-3.22). No significant association was found between depressive symptoms and <em>NR3C1&nbsp;</em>methylation. <strong>Conclusion:</strong>&nbsp;We found that maternal anxiety was associated with increased <em>NR3C1&nbsp;</em>CpG island shore methylation.</p>

DOI

10.2217/epi-2020-0022

Alternate Title

Epigenomics

PMID

33215541

Title

Racial and ethnic representation in epigenomic studies of preterm birth: a systematic review.

Year of Publication

2020

Date Published

2020 Dec 02

ISSN Number

1750-192X

Abstract

<p>We conducted a systematic review evaluating race/ethnicity representation in DNA methylomic studies of preterm birth. PubMed, EMBASE, CINHAL, Scopus and relevant citations from 1 January&nbsp;2000 to 30 June&nbsp;2019. Two authors independently identified abstracts comparing DNA methylomic differences between term and preterm births that included&nbsp;race/ethnicity data. 16&nbsp;studies were included. Black and non-Hispanic Black deliveries were well represented (28%). However, large studies originating from&nbsp;more than&nbsp;95% White populations were excluded due to unreported race/ethnicity data. Most studies were cross-sectional, allowing for reverse causation. Most studies were also racially/ethnically homogeneous, preventing direct comparison of DNA methylomic differences across race/ethnicities. In DNA methylomic studies, Black women and infants were well represented. However, the literature has limitations and precludes drawing definitive conclusions.</p>

DOI

10.2217/epi-2020-0007

Alternate Title

Epigenomics

PMID

33264049

Title

Long noncoding RNA expression in the cervix mid-pregnancy is associated with the length of gestation at delivery.

Year of Publication

2018

Number of Pages

742-750

Date Published

2018

ISSN Number

1559-2308

Abstract

<p>Infants born preterm are at increased risk of multiple morbidities and mortality. Why some women deliver preterm remains poorly understood. Prior studies have shown that cervical microRNA expression and DNA methylation are associated with the length of gestation. However, no study has examined the role of long noncoding RNAs (lncRNAs) in the cervix during pregnancy. To determine whether expression of lncRNAs is associated with length of gestation at delivery, we analyzed RNA from cervical swabs obtained from 78 women during pregnancy (mean 15.5, SD 5.0, weeks of gestation) who were participating in the Spontaneous Prematurity and Epigenetics of the Cervix (SPEC) Study in Boston, MA, USA. We used a PCR-based platform and found that 9 lncRNAs were expressed in at least 50% of the participants. Of these, a doubling of the expression of TUG1, TINCR, and FALEC was associated with shorter lengths of gestation at delivery [2.8 (95% CI: 0.31, 5.2); 3.3 (0.22, 6.3); and 4.5 (7.3, 1.6) days shorter respectively]. Of the lncRNAs analyzed, none was statistically associated with preterm birth, but expression of FALEC was 2.6-fold higher in women who delivered preterm vs. term (P&nbsp;=&nbsp;0.051). These findings demonstrate that lncRNAs can be measured in cervical samples obtained during pregnancy and are associated with subsequent length of gestation at delivery. Further, this study supports future work to replicate these findings in other cohorts and perform mechanistic studies to determine the role of lncRNAs in the cervix during pregnancy.</p>

DOI

10.1080/15592294.2018.1503490

Alternate Title

Epigenetics

PMID

30045669

WATCH THIS PAGE

Subscription is not available for this page.