Keyword search (4,164 papers available)

"Lafleur C" Authored Publications:

Title Authors PubMed ID
1 ChIP-seq protocol for sperm cells and embryos to assess environmental impacts and epigenetic inheritance Lismer A; Lambrot R; Lafleur C; Dumeaux V; Kimmins S; 34159325
PERFORM
2 Histone H3 lysine 4 trimethylation in sperm is transmitted to the embryo and associated with diet-induced phenotypes in the offspring. Lismer A, Dumeaux V, Lafleur C, Lambrot R, Brind'Amour J, Lorincz MC, Kimmins S 33596408
PERFORM
3 Sperm histone H3 lysine 4 trimethylation is altered in a genetic mouse model of transgenerational epigenetic inheritance Lismer A; Siklenka K; Lafleur C; Dumeaux V; Kimmins S; 33068438
PERFORM

 

Title:Sperm histone H3 lysine 4 trimethylation is altered in a genetic mouse model of transgenerational epigenetic inheritance
Authors:Lismer ASiklenka KLafleur CDumeaux VKimmins S
Link:https://pubmed.ncbi.nlm.nih.gov/33068438/
DOI:10.1093/nar/gkaa712
Publication:Nucleic acids research
Keywords:
PMID:33068438 Category: Date Added:2020-10-19
Dept Affiliation: PERFORM
1 Department of Pharmacology and Therapeutics, Faculty of Medicine, McGill University, Montreal, Canada.
2 Department of Animal Science, Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, Canada.
3 PERFORM Center and Department of Biology, Concordia University, Montreal, Canada.

Description:

Advancing the molecular knowledge surrounding fertility and inheritance has become critical given the halving of sperm counts in the last 40 years, and the rise in complex disease which cannot be explained by genetics alone. The connection between both these trends may lie in alterations to the sperm epigenome and occur through environmental exposures. Changes to the sperm epigenome are also associated with health risks across generations such as metabolic disorders and cancer. Thus, it is imperative to identify the epigenetic modifications that escape reprogramming during spermatogenesis and embryogenesis. Here, we aimed to identify the chromatin signature(s) involved in transgenerational phenotypes in our genetic mouse model of epigenetic inheritance that overexpresses the histone demethylase KDM1A in their germ cells. We used sperm-specific chromatin immunoprecipitation followed by in depth sequencing (ChIP-seq), and computational analysis to identify whether differential enrichment of histone H3 lysine 4 trimethylation (H3K4me3), and histone H3 lysine 27 trimethylation (H3K27me3) serve as mechanisms for transgenerational epigenetic inheritance through the paternal germline. Our analysis on the sperm of KDM1A transgenic males revealed specific changes in H3K4me3 enrichment that predominantly occurred independently from bivalent H3K4me3/H3K27me3 regions. Many regions with altered H3K4me3 enrichment in sperm were identified on the paternal allele of the pre-implantation embryo. These findings suggest that sperm H3K4me3 functions in the transmission of non-genetic phenotypes transgenerationally.





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