Team Leader : Florence Cammas
Institut de Recherche en
Cancérologie de Montpellier
CRLC Val d’Aurelle-Paul Lamarque
34298 Montpellier cedex 5
Tél. : 33 (0)4 67 61 24 21
Fax : 33 (0)4 67 61 37 87
In eucaryotic cells, DNA, the support of genetic information is wrapped in a complex nucleo-proteic structure called chromatin which dynamics plays an essential role in the interpretation of genetic information. This structure is regulated by several chromatin remodeling and modifying complexes and constitutes a second level of information so-called epigenetic information. From the last few years it has become clear that many cancers originate in incorrect establishment and/or mis-interpretation of this epigenetic information opening possibilities for new therapeutic strategies.
In the laboratory we are interested in studying the epigenetic mechanisms that regulate the choice between cell proliferation and differentiation. Our researches are focused on two families of proteins: HP1 (Heterochromatin protein 1) and TIF1 (Transcriptional Intermediary Factor 1) with a particular interest in the corepressor TIF1β (also known as KAP1 or TRIM28). These proteins are molecular platforms that allow the recruitment of multiple factors implicated in chromatin dynamics and are involved in many cellular processes including gene expression regulation, DNA repair and more globally chromatin sub-nuclear organization. We showed in the laboratory that these proteins are essential in numerous physiological processes including embryonic development and cell differentiation as well as in several pathological processes such as the establishment and/or progression of some cancers. Our research is centered on the functional characterization of these two families of proteins at the chromatin level and understanding how these proteins influence cell homeostasis.
Herquel B, Ouararhni K, Martianov I, Le Gras S, Ye T, Keime C, Lerouge T, Jost B, Cammas F, Losson R, Davidson I. Trim24-repressed VL30 retrotransposons regulate gene expression by producing noncoding RNA. Nat Struct Mol Biol. 2013 Feb 3;20(3):339-46. doi: 10. 10 38 /n s m b.2496. Epub 2013 Feb 3.
Allan RS, Zueva E, Cammas F, Schreiber HA, Masson V, Belz GT, Roche D, Maison C, Quivy JP, Almouzni G, Amigorena S. An epigenetic silencing pathway controlling T helper 2 cell lineage commitment. Nature. 2012 Jul 4. doi: 10.1038/nature 11173. [Epub ahead of print]
Allan R.S., Zueva E., Cammas F., Masson V., Roche D., Maison C., Quivy J-P., Almouzni G. & Amigorena S. Epigenetic control of Th1 to Th2 plasticity by Suv39h1 and HP1. Submitted. : contributed equally to the work.
Jeevan-Raj BP, Robert I, Heyer V, Page A, Wang JH, Cammas F, Alt FW, Losson R & Reina-San-Martin B. (2011) Epigenetic tethering of AID to the donor switch region during immunoglobulin class switch recombination. J Exp Med 208, 1649-1660.
Herquel B., Ouarahni K., Khetchoumian K., Ignat M, Télétin M., Mark M., Béchade G., Van Dorsselaer A., Sanglier-Cianférani S., Hamiche A., Cammas F., Davidson I. & Losson R (2011). Transcription cofactors TRIM24, TRIM28 and TRIM33 associate to form regulatory complexes that suppress murine hepatocellular carcinoma. Proc Natl Acad Sci U S A. 108: 8212-8217.
more informations ...