Transcriptional characterization of reproductive driven liver remodeling
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE260714 | GEO | 2024/06/26
REPOSITORIES: GEO
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Project description:Purpose: To perform RNA-Seq expression profiling of the normal rodent liver at nulliparous, lactation, and involution day 6 reproductive stages. Methods: RNA was extracted and isolated from flash frozen murine liver using the Direct-zol RNA MiniPrep kit. An input of 100ng of RNA was used for library preparation. Library construction was performed by Novogene using a NEBNext® Ultra RNA Library Prep Kit for Illumina. Qualified libraries were sequenced on an Illumina Novaseq6000 Platform using a paired-end 150 run. Results: We identified gene pathway differences bile acid production and FGFR4 signaling between different reproductive stages with upregulation of these pathways during lactation. Additionally, individual genes involved with promoting bile acid synthesis were elevated at lactation whereas genes associated with inhibiting bile acid synthesis were reduced during lactation and elevated during involution.
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Project description:The mammary gland develops mainly postnatally, when during pregnancy the epithelium grows out into the mammary fat pad and forms a network of epithelial ducts. During pregnancy, these ducts branch and bud to form alveoli. These alveoli produce the milk during lactation. After 7 days of lactation, involution was induced by force weaning the pups. The newly formed epithelium undergoes apoptosis and is removed from the tissue by neighbouring epithelial cells. Tissue remodelling leads to a morphology resembling a gland of a pre-pregnant mouse. Microarray analysis was used to measure mRNA expression of genes during puberty, pregnancy, lactation and involution in a Balb/c mouse strain. Experiment Overall Design: Total RNA was extracted from the 4th (inguinal) gland after removal of the lymph node. Individual samples represent RNA from one gland of one mouse. Samples were taken in triplicate (i.e. three mice per triplicate) for 18 time points of development.
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Project description:Primiparous sows were randomly allocated to two treatments and were separated from piglets 8h daily from Day 21 of lactation companied with daily boar exposure for oestrus detection until weaning (Day 28). Gene expression of Day 9 embryos were compared between control sows (FE; sows artificially inseminated when in heat during lactation ) and Skip-a-Heat sows (SE; sows in heat during lactation and artificially inseminated on the following oestrus cycle). Stimulating lactational oestrus then two mating strategies were applied to primiparous sows; 1)FE; sows were in heat during lactation and received artificial insemination) and Skip-a-Heat sows (SE; sows were in heat during lactation and received artificial insemination at fallowing oestrus cycle).
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