Cellular Prion Protein PrPC and Ecto-5'-Nucleotidase Are Markers of the Cellular Stress Response to Aneuploidy

In this study, we screened cell surface biomarkers of approximately 300 proteins by multiparameter flow cytometry using multiple aneuploid model systems such as cell lines, patient samples, and mouse models. Several new biomarkers were identified with altered expression in aneuploid cells, including overexpression of the cellular prion protein CD230/PrPC and the immunosuppressive cell surface enzyme ecto-5′-nucleotidase CD73. Functional analyses associated these alterations with increased cellular stress. An increased number of CD73+ cells was observed in confluent cultures in aneuploid cells relative to their diploid counterparts. An elevated expression in CD230/PrPC was observed in serum-deprived cells in association with increased generation of reactive oxygen species. Overall, our work identified biomarkers of aneuploid karyotypes, which suggest insights into the underlying molecular physiology of aneuploid cells. Cancer Res; 77(11); 2914–26. ©2017 AACR.

Source: Cancer Research - May 31, 2017 Category: Cancer & Oncology Authors: Patricia H. Domingues, Lalitha S.Y. Nanduri, Katarzyna Seget, Sharavan V. Venkateswaran, David Agorku, Cristina Vigano, Conrad von Schubert, Erich A. Nigg, Charles Swanton, Rocio Sotillo, Andreas Bosio, Zuzana Storchova, Olaf Hardt Tags: Molecular and Cellular Pathobiology Source Type: research