Research Thematics
News
Les Mardis du GRed - Octobre 2018
12H45 – 13H45
Faculté de médecine
Amphi Limagne (CRBC RdC)
Appel à candidature pour la future direction du GReD
Le GReD lance un appel à candidature pour recruter sa future directrice ou futur directeur, pour une prise de fonction en janvier 2021
CALL for a NEW RESEARCH GROUP LEADER
The GReD wishes to recruit a new independent leader to form a group within the scientific spectrum of the GReD. The GReD will provide laboratory space (50m2) and free access to state-of-the-art technological platforms (cell/tissue culture, FACS, imaging/live imaging, histology). The successful candidates will have full access to transgenic plant and animal (mouse, drosophila, Arabidopsis) and bioinformatics facilities and will benefit of administrative support. Facilities for high-throughput sequencing, mass spectrometry, proteomics, electron microscopy and radiobiology are available on the multidisciplinary Medical School campus.
Conference : "Systems biology approach to early neuronal cell fate acquisition"
"Systems biology approach to early neuronal cell fate acquisition" Hinrich Gronemeyer, IGBMC, Illkirch
Thursday 20th of septembre 2018 ; 2:30 pm
Amphi VOLCAN, CRBC, Medical School.
Contact: Laurence Vandel ( laurence.vandel@uca.fr)
GH1-HMGA1 : une protéine chromatinienne impliquée dans la stabilité des télomères et la réparation des cassures double brin de l’ADN
De par leur nature linéaire, les chromosomes des eucaryotes ont dû développer des mécanismes de protection de leurs extrémités appelés télomères. Si ces mécanismes sont défaillant, les télomères sont reconnus par la cellule comme des cassures de l’ADN et vont donc être « réparés » de façon abusive et engendrer des dommages génomiques dramatiques pour la cellule. Chez l’homme, l’ADN télomérique est remodelé par un complexe protéique spécifique, qui constituent une « coiffe » qui a pour rôle principal d’assurer la protection du génome. Malgré d’intenses recherches, très peu de protéines impliquées dans l'homéostasie des télomères ont été identifiées chez les plantes.
Dans sa dernière étude (Charbonnel et al.), le groupe de Charles White décrit le rôle de la protéine GH1-HMGA1 dans l’homéostasie télomérique ainsi que dans la réparation de l’ADN chez la plante Arabidopsis thaliana.
PhD Thesis defense : Cecilia BASSALERT
Cecilia BASSALERT (Team “Molecular mechanisms of cell lineage differentiation in the early mouse embryo") will defend her thesis entitled:
"Influence des voies de signalisation IGF et MAPK sur la spécification des lignages de l'embryon de souris préimplantatoire."
Friday the 7th of September 2018 at 2 pm
Amphi 6B , Medical School
DNA methylation : a new actor in CML biology
Chronic myeloid leukemia (CML), a cancer of the white blood cell, results from a translocation event that ultimately leads to the production of BCR-ABL1, a chimeric oncoprotein that promotes CML by aberrantly phosphorylating target proteins. Nonetheless, this event on its own, cannot account for an increasing number of clinical observation suggesting the involvement of other pathways, among which DNA methylation alteration emerges as a relevant candidate.
On that basis the teams of Marc BERGER (CHU, Clermont-Ferrand) and Philippe ARNAUD have characterized for the first time the DNA methylation patterns of CML cell subsets (immature and mature cells) isolated form the same clone during the early stage of the disease, before any treatment (Maupetit-Méhouas, Court, Bourgne et al.,). Altogether, this collaborative study demonstrated that DNA methylation abnormalities exist at early stages of CML and can affect the transcriptional landscape of malignant cells. These observations paved the way for new therapeutic strategies based on epigenetic drugs.
GENOME PLASTICITY: EXAMPLE OF 5S RIBOSOMAL RNA GENES
The genes coding 5S ribosomal RNAs (critical components of the ribosomes, the cellular machineries translating mRNA into proteins) are highly repeated in the genome, which allows the production of large quantities of these rRNAs.
In their last study (Simon et al., 2018), the team of Aline Probst and Christophe Tatout revealed an important variation in number and expression of 5S rRNA genes between different ecotypes of Arabidopsis thaliana.
Cymbopogon citratus and cancer: when citronella is a repellent not only for mosquitoes…
Through a real bilateral collaboration, Drs. Silvère BARON’s et and Jean-Marc LOBACCARO’s team Nuclear Receptor and Prostate diseases and Pr. Jacques SIMPORE’s team (Laboratoire de Biologie Moléculaire et de Génétique, Université de Ouagadougou, Burkina Faso), have identified medicinal plants of the Burkina Faso pharmacopeia that could be used in the future in cancer treatment (Bayala et al., 2018).
Recombination machinery compensates telomere loss in the absence of telomerase.
The chromosomes of most eukaryotic species are linear, consisting of a single DNA double-helix running from one end to the other. Each chromosome thus has two ends and these are protected by specialized DNA-protein structures named telomeres. The importance of telomere structure is readily observed in the severe genetic instability and cell death that result from its absence.
In its last study ( Olivier et al., 2018), the team of Charles White and Maria Gallego unveiled mechanisms by which recombination machinery contributes to protect the telomeres from replicative failure, ensuring their stability.
In a few words...
The GReD is a Research Center at Clermont-Ferrand, Auvergne Rhône Alpes region of France. Created in 2008, the GReD is supported by the University Clermont Auvergne (UCA), the CNRS (UMR6293) and the INSERM (U1103). The center is composed of 14 research groups (totalling 147 people in December 2017) based at the Centre de Recherche Bio-Clinique (CRBC) on the campus ...
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