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Histone mark modifications in murine ovary after gestational exposure to chlordecone

ABSTRACT: Histone mark modifications in murine ovary after gestational exposure to chlordecone

PROVIDER: PRJNA533110 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8910496.fastq.gz	Fastqsanger.gz
	SRR8910497.fastq.gz	Fastqsanger.gz
	SRR8910498.fastq.gz	Fastqsanger.gz
	SRR8910499.fastq.gz	Fastqsanger.gz

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Histone mark modifications in murine ovary after gestational exposure to chlordecone

Project description:We hypothesized that gestational exposure to chlordecone can lead to alteration of murine ovary's epigenetic landscape. To test our hypothesis, we exposed mice to chlordecone during embryonic development and we analyzed F1 female progeny epigenetic mark H3K4me3 in ovaries. We performed ChIP using anti-H3K4me3 commercial antibody (Merck Millipore, 07-473). DNA-protein complexes were immunoprecipitated, eluted and then DNA were purified.

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Transgenerational effect of Chlordecone [RNA-seq]

Project description:RNA seq project designed to understand the role of pesticide on transription of mRNA in the testis. We treated adult female mice with chlordecone with doses 0 (control), 100 Xg/kg/day and 1 mg/kg/day during gestation period E6- E15. Male born from Chlordecone- treated mice were crossed for a three generations. The testes from F3 generations were taken for mRNA extraction. For mRNA extraction we used columb. Three biological replicates used for each condition . We hypothesize that chlordecone cause changes in mRNA due to transgenerational effect of pesticides (Skinner et al, Science 2005). The changes in expression of certain genes can help us understand the effect of pesticides on many tissues. Number of sample :9 samples. We require Paired End sequencing and number of reads equal or more than 25M tags, strand specific sequencing

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Chemical modifications mark alternatively spliced and actively degrading messenger RNAs in Arabidopsis and humans

Project description:Post-transcriptional chemical modification of RNA bases is a widespread and physiologically relevant regulator of RNA maturation, stability, and function. While modifications are best characterized in short, noncoding RNAs such as transfer RNAs (tRNAs), growing evidence indicates that messenger RNAs (mRNAs) and long noncoding RNAs (lncRNAs) are likewise modified. Here, we apply our High-throughput Annotation of Modified Ribonucleotides (HAMR) pipeline to identify and classify modifications that affect Watson-Crick base-pairing at three different levels of the human and Arabidopsis thaliana transcriptomes (polyadenylated, small, and degrading RNAs). We find modifications primarily within actively degrading mRNAs and lncRNAs, suggesting they can act as a potent signal for RNA turnover. Additionally, modifications within stable mRNAs mark alternatively spliced introns, suggesting they regulate splicing. Furthermore, these modifications target mRNAs with coherent functions, including stress responses. Thus, our comprehensive analysis of RNA modification across multiple RNA classes yields new functional insights into these covalent RNA additions. polyA-selected RNA-seq, smRNA-seq, and polyA-selected global mapping of uncapped transcripts (GMUCT) in Arabidopsis thaliana; smRNA-seq in HEK293T and HeLa human cell lines.

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Project description:The environmental factors such as pesticides could affect the developmental processes and cause the phenotypic changes. Moreover, the changes could be transferred to a subsequent generation via gametes. In this project we studied whether the pesticide chlordecone could cause the developmental effects and cause the transgenerational inheritance in outbred mouse strain. Mice were treated during development at dose 100 µg/kg/day and the progeny of exposed mice were crossed for three generations. The testes of the third generations males were used for anti-H3K4me3 ChiP-seq analysis. We used two biological replicates for each condition.

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