Recurrent activating mutations of PPAR gamma associated with luminal bladder tumors.Rochel, N., Krucker, C., Coutos-Thevenot, L., Osz, J., Zhang, R., Guyon, E., Zita, W., Vanthong, S., Hernandez, O.A., Bourguet, M., Badawy, K.A., Dufour, F., Peluso-Iltis, C., Heckler-Beji, S., Dejaegere, A., Kamoun, A., de Reynies, A., Neuzillet, Y., Rebouissou, S., Beraud, C., Lang, H., Massfelder, T., Allory, Y., Cianferani, S., Stote, R.H., Radvanyi, F., Bernard-Pierrot, I.
(2019) Nat Commun 10: 253-253
- PubMed: 30651555
- DOI: 10.1038/s41467-018-08157-y
- Structures With Same Primary Citation
- PubMed Abstract:
The upregulation of PPARγ/RXRα transcriptional activity has emerged as a key event in luminal bladder tumors. It renders tumor cell growth PPARγ-dependent and modulates the tumor microenvironment to favor escape from immuno-surveillance. The activati ...
The upregulation of PPARγ/RXRα transcriptional activity has emerged as a key event in luminal bladder tumors. It renders tumor cell growth PPARγ-dependent and modulates the tumor microenvironment to favor escape from immuno-surveillance. The activation of the pathway has been linked to PPARG gains/amplifications resulting in PPARγ overexpression and to recurrent activating point mutations of RXRα. Here, we report recurrent mutations of PPARγ that also activate the PPARγ/RXRα pathway, conferring PPARγ-dependency and supporting a crucial role of PPARγ in luminal bladder cancer. These mutations are found throughout the protein-including N-terminal, DNA-binding and ligand-binding domains-and most of them enhance protein activity. Structure-function studies of PPARγ variants with mutations in the ligand-binding domain allow identifying structural elements that underpin their gain-of-function. Our study reveals genomic alterations of PPARG that lead to pro-tumorigenic PPARγ/RXRα pathway activation in luminal bladder tumors and may open the way towards alternative options for treatment.
Sorbonne Universités, UPMC Université Paris 06, CNRS, UMR144, 75005, Paris, France. firstname.lastname@example.org.