Publications by authors named "Sabrina LLop"

The placenta plays a crucial role in protecting the fetus from environmental harm and supports the development of its brain. In fact, compromised placental function could predispose an individual to neurodevelopmental disorders. Placental epigenetic modifications, including DNA methylation, could be considered a proxy of placental function and thus plausible mediators of the association between intrauterine environmental exposures and genetics, and childhood and adult mental health.

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Background: The purpose of this study was to assess the relationship between noise disturbance at home, sleep disturbance, and neurodevelopmental problems in 9-year-old children.

Material And Methods: Noise exposure (frequency) perceived by 430 9-year-old children from the INMA cohort in Valencia, Spain, were reported by their mothers. The risk of developing attention deficit hyperactivity disorder, as well as internalizing and externalizing problems, were assessed using the Child Behaviour Checklist.

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Article Synopsis
  • Telomere length (TL) and mitochondrial DNA copy number (mtDNAcn) are crucial biomarkers for assessing aging and oxidative stress; researchers hypothesized that exposure to methylmercury (MeHg) from fish would shorten TL and reduce mtDNAcn due to increased oxidative stress.
  • A study involving children aged 6-11 from six European countries measured prenatal and postnatal mercury levels and determined TL and mtDNAcn, while controlling for factors like lifestyle and fish consumption.
  • Results indicated that higher blood mercury levels were associated with longer TL, particularly during prenatal exposure, with significant variation based on concentration, while no changes in mtDNAcn were observed; further research is needed to understand these effects and their health implications.
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Unlabelled: The objective is to investigate the relation between cord blood mercury concentrations and child neurobehavioural functioning assessed longitudinally during childhood until pre-adolescence.

Methods: The study involves mothers and their offspring engaged in the Spanish INMA birth cohort (n = 1147). Total mercury (THg) was determined in cord blood.

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The gut-brain axis is a crucial interface between the central nervous system and the gut microbiota. Recent evidence shows that exposure to environmental contaminants, such as heavy metals, can cause dysbiosis in gut microbiota, which may affect the gut-brain communication, impacting aspects of brain function and behavior. This systematic review of the literature aims to evaluate whether deleterious effects on brain function due to heavy metal exposure could be mediated by changes in the gut microbiota profile.

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Background: Early life determinants of the development of gut microbiome composition in infants have been widely investigated; however, if early life pollutant exposures, such as tobacco or mercury, have a persistent influence on the gut microbial community, its stabilization at later childhood remains largely unknown.

Objective: In this exposome-wide study, we aimed at identifying the contribution of exposure to tobacco and mercury from the prenatal period to childhood, to individual differences in the fecal microbiome composition of 7-year-old children, considering co-exposure to a width of established lifestyle and clinical determinants.

Methods: Gut microbiome was studied by 16S rRNA amplicon sequencing in 151 children at the genus level.

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Article Synopsis
  • Mercury is widely used in industry and products, leading to significant environmental contamination and occupational exposure, with genetic factors potentially influencing how it is absorbed and metabolized in the body.
  • A study analyzed blood mercury levels in pregnant women and children to identify genetic variations (SNPs) linked to mercury concentrations, finding an estimated heritability of 24% in pregnant women but not in children.
  • The research identified 16 SNPs connected to mercury levels in pregnant women and 21 in children, but there was no significant overlap or conclusive results, suggesting differences in metabolism and the need for further validation of these findings.
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Human exposure to mycotoxins is a global concern since filamentous fungi can contaminate food and feed from crops to ready-to-eat meals. Human urine biomonitoring is a widely used technique to evaluate mycotoxins exposure, as an alternative to food correlation studies. The aim of this study is to describe human exposure to mycotoxins and to investigate the associated sociodemographic, lifestyle and dietary variables.

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Objective: Mercury (Hg) is a toxic metal, and dietary exposure is the main one in humans, especially fish consumption. In order to reduce Hg exposure, maximum levels in fish products have been established. We aimed to describe total mercury (THg) and methylmercury (MeHg) concentrations in fish species consumed in Comunitat Valenciana, as well as factors associated and their tendency during the period 2011-2017.

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Background: Energy balance-related behaviours (EBRBs), that is, dietary intake, screen, outdoor play and sleep, tend to combine into 'lifestyle patterns', with potential synergistic influences on health. To date, studies addressing this theme mainly focused on school children and rarely accounted for sleep, with a cross-country perspective.

Objectives: We aimed at comparing lifestyle patterns among preschool-aged children across Europe, their associations with socio-demographic factors and their links with body mass index (BMI).

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We explored the influence of child and maternal single nucleotide polymorphisms (SNPs) in genes related to neurological function and arsenic metabolism (i.e., , , , , , , , and as well as ) on the association between prenatal arsenic (As) exposure and methylation efficiency and neuropsychological development in 4-5-year-old children.

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Background: Inorganic arsenic (iAs) is a widespread toxic metalloid. It is well-known that iAs metabolism and its toxicity are mediated by polymorphisms in AS3MT and other genes. However, studies during pregnancy are scarce.

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Background: Several studies have reported that prenatal exposure to some persistent organic pollutants (POPs) is associated with higher adiposity in childhood. Few studies have assessed whether this finding persists into adolescence, and few have considered exposure to POPs as a mixture. This study aims to assess the association between prenatal exposure to multiple POPs and adiposity markers and blood pressure in preadolescents.

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The toxic effects of mercury exposure on human health are a public health concern. The most important source of this exposure is the consumption of fish and marine mammals. This study aims to describe hair mercury concentrations and their evolution from birth until eleven years of age in adolescents from the INMA (Environment and Childhood) birth cohort study, and to assess the association of hair mercury concentrations at eleven years of age with sociodemographic and dietary factors.

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Sedentary behaviour (SB) may be related to telomere length (TL) attrition due to a possible pro-inflammatory effect. This study examined the association between parent-reported sedentary behaviour (SB) and leukocyte TL at the age of 4 and telomere tracking from 4 to 8 years. In the Spanish birth cohort Infancia y Medio Ambiente (INMA) project, we analysed data from children who attended follow-up visits at age 4 (n = 669) and 8 (n = 530).

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Article Synopsis
  • Recent research indicates that the placenta plays a significant role in neurodevelopment and may contribute to the onset of neuropsychiatric disorders later in life.
  • A new placental methylation quantitative trait loci (mQTL) database was created, incorporating data from 368 fetal placenta samples to explore the genetic ties between placental DNA methylation and neuropsychiatric disorders using advanced statistical methods.
  • Findings suggest that certain genetic risks for schizophrenia, bipolar disorder, and major depressive disorder may be linked to DNA methylation activity in the placenta, influencing gene expression associated with these disorders.
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Background: Prenatal exposure to persistent organic pollutants (POPs) may contribute to the development of childhood obesity and metabolic disorders. However, little is known about whether the maternal nutritional status during pregnancy can modulate these associations.

Objectives: The main objective was to characterize the joint associations and interactions between prenatal levels of POPs and nutrients on childhood obesity.

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Evidence suggests that iron status may be linked to symptoms of childhood attention deficit/hyperactivity disorder (ADHD), but there is little data available on the relationship between iron status in pregnancy and the risk of developing ADHD. And the data that does exist is inconsistent. Our aim here is to assess the effect of maternal serum ferritin (SF) and haemoglobin (Hb) levels during pregnancy on manifestations of ADHD in children at 7 years of age.

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  • - Mycotoxin contamination in food is a global health issue, so it's important to monitor human exposure, primarily through urine where these toxins are found.
  • - This study aimed to develop and validate a sensitive method using Liquid Chromatography coupled to Quadrupole Time of Flight Mass Spectrometry (LC-Q-TOF-MS) to detect ten specific mycotoxins while also identifying others.
  • - The researchers employed various extraction methods and settled on a modified QuEChERS technique, achieving good recovery rates for the mycotoxins, and tested the final method on urine samples from women, finding higher levels of specific untargeted mycotoxins.
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Background: In the USA, genetically admixed populations have the highest asthma prevalence and severe asthma exacerbations rates. This could be explained not only by environmental factors but also by genetic variants that exert ethnic-specific effects. However, no admixture mapping has been performed for severe asthma exacerbations.

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Background & Aims: Maternal ultra-processed food (UPF) consumption during pregnancy may adversely affect child development. Pregnancy sugar-sweetened beverage consumption (as a part of UPF) has been associated with child cognitive dysfunction in the general population, but the role of total UPF consumption during pregnancy in later child neuropsychological development has not been studied. We aimed to analyse the association between maternal pregnancy UPF consumption and child neurodevelopment.

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Background: Inadequate sleep duration has been suggested as a chronic stressor associated with changes in telomere length (TL). This study aimed to explore the association between sleep duration and TL using the INMA birth cohort study data.

Methods: A total of 1014 children were included in this study (cross-sectional: 686; longitudinal: 872).

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Previous literature on prenatal phenol exposure and thyroid hormone (TH) alteration is conflicting, and the possible mechanisms of action involved remain unclear. We aimed to examine the association between prenatal phenol exposure and levels of maternal and neonatal THs, as well as the possible role of iodothyronine deiodinase (DIO) gene polymorphisms in this relation. We studied 387 Spanish mother-neonate pairs with measurements of maternal phenols, total triiodothyronine (TT3) and free thyroxine (FT4), maternal and neonatal thyroid-stimulating hormone (TSH), and maternal genotypes for single nucleotide polymorphisms in the DIO1(rs2235544) and DIO2(rs12885300) genes.

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Early exposure to mercury has been related to endocrine disruption. Steroid hormones play a crucial role in neural cell migration, differentiation, etc., as well as protecting against several neurotoxic compounds.

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