TNFSF10/TRAIL regulates human T4 effector memory lymphocyte radiosensitivity and predicts radiation-induced acute and subacute dermatitis
Metrics: PDF 1790 views | HTML 2736 views | ?
Jan Baijer1,2,3,4, Nathalie Déchamps1,2,3,4, Hervé Perdry5, Pablo Morales1, Sarah Kerns6, Alexandre Vasilescu1, Sylvain Baulande7, David Azria8, Paul Henri Roméo1,2,3,4 and Annette Schmitz1
1 CEA/DRF/IRCM/SCSR, Fontenay-aux-Roses Cedex, France
2 Inserm U967, Fontenay-aux-Roses Cedex, France
3 Université Paris-Diderot, Paris, France
4 Université Paris-Sud, Paris, France
5 Université Paris-Saclay, Univ. Paris-Sud, Inserm, CESP, Villejuif, France
6 University of Rochester Medical Center, Rochester, NY, USA
7 ICGex Next-Generation Sequencing Platform, Institut Curie, Paris, France
8 Department of Radiation Oncology, ICM-Val d’Aurelle and INSERM U896, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
Paul Henri Roméo, email:
Keywords: TRAIL, biomarker, lymphocyte, apoptosis, acute radiosensitivity
Received: November 13, 2015 Accepted: February 18, 2016 Published: March 16, 2016
Sensitivity of T4 effector-memory (T4EM) lymphocytes to radiation-induced apoptosis shows heritability compatible with a Mendelian mode of transmission. Using gene expression studies and flow cytometry, we show a higher TNF-Related Apoptosis Inducing Ligand (TRAIL/TNFSF10)mRNA level and a higher level of membrane bound TRAIL (mTRAIL) on radiosensitive compared to radioresistant T4EM lymphocytes. Functionally, we show that mTRAIL mediates a pro-apoptotic autocrine signaling after irradiation of T4EM lymphocytes linking mTRAIL expression to T4EM radiosensitivity. Using single marker and multimarker Family-Based Association Testing, we identified 3 SNPs in the TRAIL gene that are significantly associated with T4EM lymphocytes radiosensitivity. Among these 3 SNPs, two are also associated with acute and subacute dermatitis after radiotherapy in breast cancer indicating that T4EM lymphocytes radiosensitivity may be used to predict response to radiotherapy. Altogether, these results show that mTRAIL level regulates the response of T4EM lymphocytes to ionizing radiation and suggest that TRAIL/TNFSF10 genetic variants hold promise as markers of individual radiosensitivity.
All site content, except where otherwise noted, is licensed under a Creative Commons Attribution 4.0 License.