Microbiota composition from fecal samples of low-weight preterm neonates
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PROVIDER: PRJEB30846 | ENA |
REPOSITORIES: ENA
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Project description:Microbiota composition from fecal samples of low-weight preterm neonates Metagenome
| PRJNA510235 | ENA
Project description:Endothelial colony-forming cells were isolated and expanded from the mononuclear cell fraction (MNC) obtained from the cord blood of term (CT) and preterm (PT) neonates, and characterized as previously described (Vassallo PF et al 2014). The objective of the study was to identify differentially expressed genes between CT and PT neonates. ECFC were harvested from cultures dishes at passage 3 and total RNA was extracted using the mirVana miRNA Isolation Kit (Ambion), according to the manufacturerâs recommendations. Cy3-CTP labeled RNA was prepared according to standard Agilent protocol from 400ng total RNA. The hybridization was performed for 17 hrs at 65°C. cRNA labeling and hybridization performance were performed and all parameters checked were found within the manufacturers specifications. Arrays were scanned as described in the manufacturersâ protocol. Signal intensities on 20 bit tiff images were calculated by Feature Extraction software (FE, Version 8.5; Agilent Technologies). Data analyses were conducted with GeneSpring GX software (Vers.13.1.1; Agilent Technologies)
2017-10-01 | E-MTAB-4860 | biostudies-arrayexpress
Project description:Intestinal microbiota colonization is important for intestinal development and health of preterm infants, especially those with extremely low birth weight. Recent studies indicated for a dynamic crosstalk between that gut microbiota and DNA methylome of host intestinal cells. Thereby, we sought to determine the epigenomic and metagenomic consequences of suppression of microbiota colonization in the intestine of preterm neonates to gain insights into biological pathways that shape the interface between the gut microbiota and the preterm intestinal cells. We examined 14 preterm piglets by comparing the conventional preterm neonates with those ones treated with oral antibiotics for genome wide DNA methylation and 16S rDNA microbiome. Our results demonstrated an extensive genome-wide DNA methylation changes in response to the suppression of intestinal microbe colonization, especially genes involved in neonatal immune response signaling and glycol-metabolism pathways were identified. Our study highlights several key genes that might predispose preterm neonates to NEC risk due to their key roles involved in the immune-metabolic networks. Our study not only provided rich omic-data to interpret molecular program in relation with microbiota-associated methylome-proteome network changes, but also confer clinical usage of key gene markers for potential early diagnostics of NEC of preterm neonates.
2017-10-12 | GSE88697 | GEO
Project description:Necrotizing enterocolitis (NEC) is an acute and life-threatening gastrointestinal disorder afflicting preterm infants, which is currently unpreventable. Fecal microbiota transplantation (FMT) is a promising preventative therapy, but potential bacterial infection raise concern. Removal of bacteria from donor feces may reduce this risk while maintaining the NEC-preventive effects. We aimed to assess preclinical efficacy and safety of bacteria-free fecal filtrate transfer (FFT). Using fecal material from healthy suckling piglets, we administered FMT rectally, or cognate FFT either rectally or oro-gastrically to formula-fed preterm, cesarean-delivered piglets as a model for preterm infants, We compared gut pathology and related safety parameters with saline controls, and analyzed ileal mucosal transcriptome to gauge the host e response to FMT and FFT treatments relative to control. Results showed that oro-gastric FFT prevented NEC, whereas FMT did not perform better than control. Moreover, FFT but not FMT reduced intestinal permeability, whereas FMT animals had reduced body weight increase and intestinal growth. Global gene expression of host mucosa responded to FMT but not FFT with increased and decreased bacterial and viral defense mechanisms, respectively. In conclusion, as preterm infants are extremely vulnerable to enteric bacterial infections, rational NEC-preventive strategies need incontestable safety profiles. Here we show in a clinically relevant animal model that FFT, as opposed to FMT, efficiently prevents NEC without any recognizable side effects. If translatable to preterm infants, this could lead to a change of practice and in turn a reduction in NEC burden.
2021-10-01 | GSE158878 | GEO
Project description:Epigenome analysis of whole-blood samples of septic and healthy preterm neonates
| PRJNA656201 | ENA
Project description:Impact of early empiric antibiotic use on the gut microbiota in very low birth weight preterm infants
| PRJEB39734 | ENA
Project description:Impact of early empiric antibiotic use on the gut microbiota in very low birth weight preterm infants
| PRJEB39732 | ENA
Project description:To characterize the molecular profile of the chorioamniotic membranes of preterm neonates with and without neurocognitive impairment at 18-24 months and (2) to determine if neonates who developed neurocognitive impairment can be identified at birth. Paired two-group design
2015-01-21 | E-GEOD-61822 | biostudies-arrayexpress
Project description:Bronchopulmonary dysplasia (BPD) is a lung disease in premature infants characterized by impaired pulmonary development which persists into later life. While advances in neonatal care have improved survival rates of premature infants, cases of BPD haves been increased. Therapeutic options are limited for prevention and treatment. This study was designed to explore the relationship between gestational age (GA), birth weight and estímate blood cell-type composition in premature infants and to elucidate early epigenetic biomarkers associated with BPD. Cord blood DNA from preterm neonates that went on to develop BPD (n = 14) or not (nonBPD, n = 93) was applied to Illumina 450K methylation arrays. Using DNA methylation analysis of cord blood DNA, we investigated association of GA and birth weight with the estimated distribution of cord blood cell types, particularly the nucleated red blood cell (NRBC) in a pilot-size cohort of preterm infants with or without BPD. We describe changes in methylation-based estimates of blood cell-type composition in relation to GA and birth weight. After adjusting for covariates (GA, birth weight, cell type proportions, etc.) we identify differentially methylated CpGs and genes associated with BPD.
2022-05-05 | GSE188949 | GEO
Project description:Preterm neonates are susceptible to gastrointestinal (GI) disorders such as necrotizing enterocolitis (NEC). Maternal milk, and especially colostrum, protects against NEC via growth promoting, immunomodulatory and antimicrobial factors. The fetal enteral diet, amniotic fluid (AF), contains similar bioactive components and we hypothesized that postnatal AF administration would reduce inflammatory responses and NEC in preterm neonates. Thirty preterm pigs (92% gestation) were delivered by caesarean section and fed total parental nutrition (TPN) for 48 h followed by enteral porcine colostrum (COLOS, n=7), infant formula (FORM, n=13) or formula + porcine AF (AF, n=10). Using a previously validated model of NEC in preterm pigs, we determined the structural, functional, microbiological and immunological responses to AF when administered prior to and after introduction of a suboptimal enteral formula diet. Keywords: Healthy versus inflammed tissues in relation to necrotizing enterocolitis
2010-03-01 | GSE13515 | GEO