Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR10230812_1.fastq.gz | Fastqsanger.gz | |||
| SRR10230812_2.fastq.gz | Fastqsanger.gz | |||
| SRR10230813.fastq.gz | Fastqsanger.gz |
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Project description:Genetic factors do not fully account for the relatively high heritability of neurodevelopmental conditions, suggesting that non-genetic heritable factors contribute to their etiology. To evaluate the potential contribution of aberrant thyroid hormone status to the epigenetic inheritance of neurological phenotypes, we examined genetically normal mice with paternal grandparents that were developmentally overexposed to thyroid hormone due to a Dio3 mutation. Hypothalamic gene expression profiling in postnatal day 15 mice with control ancestry (Control), with a Dio3KO paternal grandmother (PGM), with Dio3KO paternal grandfather (PGF), with a heterozygous DIo3KO mother (HM) and with a heterozygous DIO3KO father (HF).
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Project description:Human milk (HM) is rich in miRNAs, which are thought to contribute to infant protection and development. We used deep sequencing to profile miRNAs in the cell and lipid fractions of HM obtained post-feeding from 10 lactating women in month 2, 4, and 6 postpartum. In both HM fractions, 1,195 mature known miRNAs were identified, which were positively associated with the cell (p=0.048) and lipid (p=0.010) content of HM. An additional 5,167 novel miRNA species were predicted, of which 235 were high-confidence miRNAs expressed in ≥3 samples with total reads of >20. HM cells contained more known miRNAs than HM lipids (1,136 and 835 respectively, p<0.001), with 146 of the common species upregulated in HM cells and 133 in HM lipids (p<0.05). Further, the profile of the novel miRNAs was very different between the two HM fractions, with the majority conserved in the cell fraction and being mother-specific. However, out of the 776 known miRNA species commonly present in the two HM fractions, 63.9% were similarly expressed (p>0.05), with great similarities in the profile of top 20 known miRNAs. These were largely similar also between the three lactation stages examined, as were the total miRNA concentration, and the number and overall expression of the known miRNAs commonly present in the two HM fractions (p>0.05). Yet, approximately a third of known miRNAs were differentially expressed during the first 6 months of lactation (p<0.05), with more pronounced miRNA upregulation seen in month 4. These findings indicate that although the total miRNA concentration of HM cells and lipids provided to the infant does not change in the first 6 months of lactation, the miRNA composition is somewhat altered, particularly in month 4 compared to months 2 and 6. This may reflect the remodeling of the gland in response to infant feeding patterns, which usually change after exclusive breastfeeding, and thus adaptation to infant needs.
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Project description:Despite the use of current antiretroviral therapy (ART) in HIV-1 infected mothers, approximately 5% of new HIV-1 infections still occur in breastfed infants annually. Human Milk (HM) exosomes are highly enriched in maternal microRNAs (miRNAs) and after ingestion and subsequent absorption play an important role in neonatal innate and adaptive immunity. Although, HM exosomes derived from healthy donors are known to inhibit HIV-1 transmission; the effect of HIV-1 on HM exosomal miRNA signatures remains unknown. In the present study, for the first time HM derived exosomal miRNA profiles were determined in HIV-1 infected women.
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