In a few words...
The GReD is a Research Center at Clermont-Ferrand, capital of the Auvergne region of central France. Created in 2008, the GReD is supported by the University of Auvergne, the University Blaise Pascal, the CNRS (UMR6293) and the INSERM (U1103). The center is composed of 10 research groups (totalling 130 people in April 2014) and is situated on the neighbouring campuses ...Read more
When it comes to DNA methylation, 1 + 1 = 3.
Variation in DNA methylation, which decorates DNA of most living organisms, can impact gene transcription, just like does DNA sequence. How distinct DNA methylation states of genes and transposons, called epialleles, emerge is not well understood. A collaborative work by the groups of Olivier Mathieu (CNRS/Laboratory GReD) and Detlef Weigel (Max Planck Institute for Developmental Biology, Germany) published in PNAS now highlights the rapid and massive creation of novel epialleles following an epigenomic shock. The epigenomic shock is triggered by combining identical genomes with different DNA methylation patterns in the same individual, and is characterized by widespread changes in DNA methylation and gene expression. Many novel epialleles not found in the parents emerge at protein-coding genes. On the other hand, transposons generally undergo decrease in DNA methylation associated with transcriptional activation, which can translate into transposon mobilization in the progeny. Hence, in addition to providing a scenario for the rapid and broad-scale emergence of epigenetic variation, this work may have implications for transposon dynamics within populations.Read more
When the liver controls male puberty....
Puberty is a key event for the development of male reproductive functions. It depends on the increase of testosterone produced by the testis, under the control of the activity of the hypothalamic-pituitary axis. Ultimately, this leads to the maturation of secondary sexual characteristics, to the establishment and maintenance of spermatogenesis and fertility. In a study published in Oncotarget (Baptisard et al., 2016), David Volle and Coll. reveal that he nuclear receptor for bile acids, FXRa, play a key role in this process.Read more
A focus on sperm DNA oxidative damage : a putative new trail to improve some male infertile situations
Oxidative alterations of the sperm nucleus are causative of reproductive failures and increase the risk of transmitting paternal inherited mutations to the next generation. With the goal to explore new therapeutic approaches, two new reports from the GReD research team « Mechanisms of Post-testicular Infertility » headed by Joël Drevet, have focused on one of the most common sperm DNA alterations, which is sperm DNA oxidation.Read more
Les Mardis du GRed - Mai 2016
12H30 – 13H30
Faculté de médecine
Amphi 1 (1èR étage, R1)
GRED’s people in the spotlight
Heidi Serra received the young researcher award 2015 from the Bettencourt-Schueller foundation.Read more