Publications by authors named "Rachel L Maguire"

Article Synopsis
  • CpG site methylation patterns could enhance the differentiation between high-grade and low-grade cervical abnormalities, potentially improving screening processes.
  • In a study involving cervical samples from 117 low-grade (≤CIN1) and 31 high-grade (CIN2+) lesions, DNA was analyzed using Illumina HumanMethylation arrays to assess differential methylation (DM) and differential variability (DV) among cancer-associated genes.
  • The results showed higher methylation in specific gene clusters for CIN2+ and identified 3,534 DM and 270 DV CpGs, with implications for refining cervical cancer screening algorithms through better triage of detected abnormalities.
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  • African American women experience poorer birth outcomes, such as preterm birth, largely due to multifaceted factors including psychosocial stressors and oxidative stress, which have not been extensively studied.
  • The study measured psychosocial stressors among 50 pregnant women and linked higher oxidative stress in African Americans to increased adverse childhood experiences and depression, which were associated with lower gestational age at birth.
  • While the findings are based on a small sample, they suggest a potential connection between psychosocial stress and oxidative stress in relation to preterm births in African Americans, indicating a need for larger studies to validate these results.
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  • * A meta-analysis of 37 studies revealed that higher MEA is linked to different DNA methylation patterns in offspring at birth, childhood, and adolescence, with significant findings at 473 specific sites associated with maternal factors like smoking and nutrition.
  • * The research underscores the connection between socio-economic status and biological processes, enhancing our understanding of how maternal education impacts health through genetic mechanisms and emphasizing the role of social determinants in health disparities.
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  • Methylation levels in cervical samples may serve as predictive markers for the progression of precancerous cervical lesions, particularly high-grade cervical intraepithelial neoplasia (CIN2+).
  • A study analyzing DNA samples from 289 colposcopy patients showed that increased methylation at specific genes correlated with a quicker progression to CIN2+, with specific markers like CADM1 and RARB showing significant associations.
  • The research also identified 336 novel CpGs related to disease progression, highlighting the potential for these markers in future cervical cancer assessments.
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  • Seasonal variations at birth can influence DNA methylation, which may affect health outcomes over a person’s lifetime.
  • A study involving multiple cohorts discovered specific DNA methylation patterns linked to different birth seasons, revealing 26 differentially methylated regions (DMRs) at birth and 32 in childhood.
  • Results suggested that geographic latitude plays a role in these associations, linking certain genes to conditions like schizophrenia and asthma, particularly in infants born in higher latitudes (≥50°N).
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Background: Psychosocial and physiologic stressors, such as depression and obesity, during pregnancy can have negative consequences, such as increased systemic inflammation, contributing to chronic disease for both mothers and their unborn children. These conditions disproportionately affect racial/ethnic minorities. The effects of recommended dietary patterns in mitigating the effects of these stressors remain understudied.

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Introduction: Smoking and smoke exposure among pregnant women remain persistent public health issues. Recent estimates suggest that approximately one out of four nonsmokers have measurable levels of cotinine, a marker indicating regular exposure to secondhand smoke. Epidemiological research has attempted to pinpoint individual-level and neighborhood-level factors for smoking during pregnancy.

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  • Research shows that children exhibit sex-specific differences in disease prevalence, onset age, and susceptibility, potentially linked to DNA methylation variations.
  • A meta-analysis of 8438 newborns and 4268 older children found significant differences in DNA methylation at nearly 47,000 CpG sites, with males generally showing lower methylation than females.
  • The study identified additional methylation sites related to conditions like cancer and psychiatric disorders, emphasizing the role of DNA methylation in understanding health disparities between sexes.
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Background: High-risk human papillomavirus (hrHPV) testing is utilized in primary cervical cancer screening, generally along with cytology, to triage abnormalities to colposcopy. Most screening-based hrHPV testing involves pooled detection of any hrHPV or of HPV16/18. Cervical neoplasia progression risks based on extended hrHPV genotyping-particularly non-16/18 hrHPV types-are not well characterized.

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Despite years of advisories against the behavior, smoking among pregnant women remains a persistent public health issue in the USA. Recent estimates suggest that 9.4% of women smoke before pregnancy and 7.

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Maternal periconceptional diets have known associations with proper offspring neurodevelopment. Mechanisms for such associations include improper energy/nutrient balances between mother and fetus, as well as altered offspring epigenetics during development due to maternal nutrient and inflammatory status. Using a comprehensive food frequency questionnaire and assessing offspring temperament with the Infant-Toddler Social and Emotional Assessment ( = 325, mean age = 13.

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There has been limited examination of the association between parenting stress and child weight-related behaviors. We aimed to determine whether parenting stress is associated with child weight-related behaviors, including physical activity, screen time, diet, sedentary time, and eating in the absence of hunger (EAH). Secondarily, we assessed association between parenting stress and child weight status.

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Smoke-free home rules restrict smoking in the home, but biomarkers of secondhand smoke exposure are needed to help understand the association between smoke-free homes and child secondhand smoke exposure. Participants ( = 346) were majority Black/African American mother-child dyads from a longitudinal study in North Carolina. Mothers completed questionnaires on household smoking behaviors and rules, and child saliva samples were assayed for secondhand smoke exposure.

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Background: Maternal smoking during pregnancy is related to altered DNA methylation in infant umbilical cord blood. The extent to which low levels of smoke exposure among nonsmoking pregnant women relates to offspring DNA methylation is unknown.

Objective: This study sought to evaluate relationships between maternal prenatal plasma cotinine levels and DNA methylation in umbilical cord blood in newborns using the Infinium HumanMethylation 450K BeadChip.

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Background: Although maternal systemic inflammation is hypothesized to link maternal pre-pregnancy obesity to offspring metabolic dysfunction, patient empirical data are limited.

Objectives: In this study, we hypothesized that pre-pregnancy obesity alters systemic chemo/cytokines concentrations in pregnancy, and this alteration contributes to obesity in children.

Methods: In a multi-ethnic cohort of 361 mother-child pairs, we measured prenatal concentrations of plasma TNF-α, IL-6, IL-8, IL-1β, IL-4, IFN-γ, IL-12 p70 subunit, and IL-17A using a multiplex ELISA and examined associations of pre-pregnancy obesity on maternal chemo/cytokine levels, and associations of these cytokine levels with offspring body mass index z score (BMI-z) at age 2-6 years using linear regression.

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Introduction: Many children suffer from secondhand smoke exposure (SHSe), which leads to a variety of negative health consequences. However, there is no consensus on how clinicians can best query parents for possible SHSe among children. We employed a data-driven approach to create an efficient screening tool for clinicians to quickly and correctly identify children at risk for SHSe.

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Article Synopsis
  • DNA methylation in childhood and adolescence shows significant correlations with body mass index (BMI), suggesting potential early indicators of obesity.
  • Analysis involved cord blood and whole blood measurements from up to 4,133 children in various studies, indicating the importance of age-specific patterns in dietary and physical health.
  • Findings reveal that as children age, the strength of the associations between DNA methylation and BMI increases, emphasizing the potential for using methylation patterns in obesity prevention strategies.
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Prenatal cadmium exposure at non-occupational levels has been associated with poor birth outcomes. The intake of essential metals, such as iron and selenium, may mitigate cadmium exposure effects. However, at high levels, these metals can be toxic.

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Cadmium (Cd) is a ubiquitous environmental pollutant associated with a wide range of health outcomes including cancer. However, obscure exposure sources often hinder prevention efforts. Further, although epigenetic mechanisms are suspected to link these associations, gene sequence regions targeted by Cd are unclear.

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Understanding the relationship between snacking and dietary intake in early life years is one key but understudied area. In this study, we examined snacking patterns in toddlers and preschool children and the associations between snacking frequency and daily energy intake. We analyzed data from children aged 12-72 months (N = 1186) in the Newborn Epigenetic STudy (NEST).

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  • Birthweight is linked to health outcomes throughout life, and DNA methylation may play a significant role, as shown in a meta-analysis involving 8,825 neonates.
  • The study identified 914 DNA methylation sites in neonatal blood associated with birthweight, revealing a weight difference from -183 to 178 grams per 10% increase in methylation.
  • Although some of the methylation changes related to birthweight were also seen in childhood, they did not persist into adulthood, suggesting the need for further research to clarify the causal relationships involved.
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Pre-pregnancy obesity is an established risk factor for adverse sex-specific cardiometabolic health in offspring. Epigenetic alterations, such as in DNA methylation (DNAm), are a hypothesized link; however, sex-specific epigenomic targets remain unclear. Leveraging data from the Newborn Epigenetics Study (NEST) cohort, linear regression models were used to identify CpG sites in cord blood leukocytes associated with pre-pregnancy obesity in 187 mother-female and 173 mother-male offsprings.

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Background: Epigenetic mechanisms, including methylation, can contribute to childhood asthma. Identifying DNA methylation profiles in asthmatic patients can inform disease pathogenesis.

Objective: We sought to identify differential DNA methylation in newborns and children related to childhood asthma.

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Maternal diet during pregnancy has been shown to influence the child neuro-developmental outcomes. Studies examining effects of dietary patterns on offspring behavior are sparse. Determine if maternal adherence to a Mediterranean diet is associated with child behavioral outcomes assessed early in life, and to evaluate the role of differentially methylated regions (DMRs) regulating genomically imprinted genes in these associations.

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Background: Epigenetic modifications, including DNA methylation, act as one potential mechanism underlying the detrimental effects associated with prenatal tobacco smoke (PTS) exposure. Methylation in a gene called AXL was previously reported to differ in response to PTS.

Methods: We investigated the association between PTS and epigenetic changes in AXL and how this was related to childhood asthma phenotypes.

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