Differentially expressed genes in cotyledon of ewes fed mycotoxins
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA656255 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR12422825.fastq.gz | Fastqsanger.gz | |||
| SRR12422826.fastq.gz | Fastqsanger.gz | |||
| SRR12422828.fastq.gz | Fastqsanger.gz | |||
| SRR12422829.fastq.gz | Fastqsanger.gz | |||
| SRR12422830.fastq.gz | Fastqsanger.gz |
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Project description:Consumption of ergot alkaloids, specifically ergovaline, found in endophyte-infected tall fescue causes potent vasoconstriction and has been linked to reductions in placental mass and fetal growth and development. The objective of this study was to elucidate differences in the cotyledonary transcriptome of ewes consuming ergovaline during gestation through RNA-sequencing.
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Project description:Bisphenol S (BPS) is a substitute for bisphenol A in plastic manufacturing, the BPA being an endocrine disruptor that alters granulosa cell (GC) functions. Furthermore, bisphenols are able to modulate lipid metabolism and adipogenesis. The aim of this study was therefore to characterise the effects of chronic exposure to BPS on the proteome of ewe GCs considering the interaction between metabolism and reproductive function. Forty adult cyclic ewes were divided into two groups with contrasted diets: restricted (R, n=20) and well-fed (WF, n=20). Within each group, two subgroups were defined according to BPS exposure (0 and 50 µg/kg/day) to generate 4 final groups: R0 and R50 for the restricted ewes, WF0 and WF50 for the well-fed ewes. After three months, the mean body condition score and plasma levels of glucose and non-esterified fatty acids were significantly higher in well-fed than in restricted females. After synchronization of the ewes, GC samples were collected from preovulatory follicles, few hours before the presumptive ovulation. After washing of the cells, the proteins in collected GCs samples (50 µg) were analyzed by nanoliquid chromatography coupled with tandem mass spectrometry (nanoLC-MS/MS). Overall, 1004 proteins were identified, among which 882 were quantified. Principal component analysis of data revealed that all the conditions are quite distinct from one another, and there is a clear separation between ewes on a restricted diet and those on a well-fed diet. Hierarchical clustering of differentially abundant proteins (DAPs) identified five clusters of DAPs, and three cluster have unique protein profile for one condition. Functional analysis of DAPs showed an enrichment in metabolic processes, immune system and cell response to stress. This study is the first reporting and comparing the entire proteome of granulosa cells from ewes exposed or not to chronic BPS exposure with a contrasted diet.
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Project description:Pregnant Suffolk ewes (n = 19; 81.2kg ± 7.7) estimated to be carrying twins were assigned to endophyte-infected tall fescue seed (E+; 4.14 µg ergovaline + ergovalinine/g seed) or a control diet (CON; 0 µg ergovaline + ergovalinine) and evaluated at different stages of gestation (gd85 [pre-treatment, n = 3], gd110 [n = 4/treatment] or gd133 [n = 4/treatment). Ewes were individually fed a basal diet with (E+) or without (CON) endophyte-infected tall fescue seed from gd86 to gd110 or gd133. A terminal necropsy was performed, and uterine components were evaluated for size, weight, and type. Data were analyzed using a priori contrasts to test effects of stage of gestation (gd85 vs. gd110 or gd110 vs. gd133) and adaptive responses to feeding E+ fescue seed versus CON at gd110 and gd133. Serum prolactin concentrations were greater (P < 0.05) at gd110 than gd85, and then remained constant to gd133. Feeding E+ tall fescue seed reduced (P < 0.05) serum prolactin concentrations compared to CON at both gd110 and gd133. From gd85 to gd110, placentome type and number changed from type A to type B (P < 0.05) but did not change (P > 0.05) after gd110. Total fetal weight per ewe increased 2977 g from gd85 to gd110 (P = 0.011) and then 3151 g from gd110 to 133 (P = 0.012). Brain weight as a percentage of fetal body weight was higher (P = 0.029) for E+ fetuses on gd110 compared to CON, which demonstrates asymmetrical growth and intrauterine growth restriction (IUGR). In total, 15,961 genes were identified in the cotyledon through mapping to the ovine genome across all samples. There were 136 genes differentially expressed (FDR < 0.05; log2foldchange < -1 and > 1) from gd85 to gd110 with ovarian steroidogenesis and steroid biosynthesis pathways enriched and 469 genes differentially expressed from gd110 to gd133 with ribosome and oxidative phosphorylation pathways enriched. Exposure to E+ fescue resulted in differential expression of 22 genes at gd110 but only one gene at gd133 compared to CON. These results show that there are major changes in fetal growth and placental remodeling during the late gestation period that are influenced by exposure to ergot alkaloids from endophyte-infected tall fescue seed; however, major changes in the transcriptome of the cotyledon tissue in response to E+ fescue were not observed and other factors must be involved in the reduction of placental efficiency and fetal growth observed with E+ fescue exposure.
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