ABSTRACT
Background: The COVID-19 pandemic represents a collective trauma that may have enduring stress effects during sensitive periods, such as pregnancy. Prenatal stress may result in epigenetic signatures of stress-related genes (e.g., the serotonin transporter gene, SLC6A4) that may in turn influence infants’ behavioral development. Methods: In April 2020, we launched a longitudinal cohort study to assess the behavioral and epigenetic vestiges of COVID-19-related prenatal stress exposure in mothers and infants. COVID-19-related prenatal stress was retrospectively assessed at birth. SLC6A4 methylation was assessed in infants’ buccal cells. Infants’ temperament was assessed at 3-month-age. Results: Complete data were available from 108 mother-infant dyads. Greater COVID-19-related prenatal stress was significantly associated with higher infants’ SLC6A4 methylation (RR =.07, p =.007, B =.16 [.05;.29]). SLC6A4 methylation at these sites predicted infants’ temperament at 3 months (RR =.05, p =.027, B = -.45 [-.92;-.06]). Conclusion: Indirect effects of the pandemic may alter the trajectories of behavioral development infants. Appropriate prevention and care acts need to be adopted by healthcare systems.
ABSTRACT
The prevalence of SARS-CoV-2 infection during pregnancy is relatively unknown. In this study we report the potential impact of undiagnosed SARS-CoV-2 infection on pregnancy loss in the first half of pregnancy by comparing the prevalence of the infection in a retrospective group of pregnant women with miscarriage (n=62) and a prospective control group with no pregnancy loss in the first trimester (n=218). Of 62 women who had miscarriage, 2 (3.2%) resulted IgM for SARS-CoV-2 negative and IgG seropositive, while of 218 pregnant women, 5 (2.3 %) resulted IgM for SARS-CoV- 2 and IgG seropositive. The SARS-CoV-2 seroprevalence was not significantly different in the two groups of women, therefore excluding a significant role of SARS-CoV-2 infection in pregnancy loss. Therefore, our data show that SARS-CoV-2 infection within the first trimester does not seem to predispose to early pregnancy loss and that the impact of asymptomatic or mildly symptomatic SARS-CoV-2 infection on pregnancy appears limited.
ABSTRACT
Background: The coronavirus disease of 2019 (Covid-19) represents an unprecedented threat for human health worldwide that may have profound stress effects. Pregnancy is a sensitive period for adverse parenting effects on infants’ development and epigenetic mechanisms (DNA methylation) may play a pivotal role. Here we present the study protocol of the MOM-COPE project. Methods: Mothers and infants will be enrolled in twelve neonatal units in Northern Italy, a dramatic hotspot for Covid-19 contagion in Europe. Maternal covid-related stress will be assessed with an ad-hoc questionnaire. At birth, newborns and mothers’ salivary samples will be obtained to estimate target genes’ methylation (BDNF, FKBP5, NR3C1, SLC6A4, and OXTR). Post-natal bonding and infants’ temperament will be assessed through maternal reports at 3, 6 and 12 months. Maternal sensitivity and infants’ emotional regulation will be assessed during remote videotaped mother-infant interaction at 12 months. Results: The study has obtained approval of the Ethics Committee and is going to start by May 15th. Hypotheses and anticipated results will be discussed according to the available behavioral epigenetic literature on parenting, pregnancy and large-scale disasters. Discussion: This multi-centric study will provide evidence about the effect of pandemic-related prenatal stress exposure on the health and well-being of mothers and infants from birth to 12 months of age. Moreover, the longitudinal nature of the study will allow to assess the relative role of epigenetic regulation of specific target genes in mediating the effect of this precocious adverse exposure on short- and long-term outcomes.