Oncogenic cooperation between SOCS family proteins and EGFR identified using a Drosophila epithelial transformation model

Héctor Herranz; Xin Hong; Nguyen Thanh Hung; P. Mathijs Voorhoeve; Stephen M. Cohen

doi:10.1101/gad.192021.112

Oncogenic cooperation between SOCS family proteins and EGFR identified using a Drosophila epithelial transformation model

¹Institute of Molecular and Cell Biology, Singapore 138673, Singapore;
²Department of Biological Sciences, National University of Singapore, Singapore 119613, Singapore;
³Duke-NUS (National University of Singapore) Graduate Medical School, Singapore 169857, Singapore;
⁴Department of Biochemistry, National University of Singapore, Singapore 119613, Singapore

↵5 These authors contributed equally to this work.

Abstract

MicroRNAs (miRNAs) are emerging as cooperating factors that promote the activity of oncogenes in tumor formation and disease progression. This poses the challenge of identifying the miRNA targets responsible for these interactions. In this study, we identify the growth regulatory miRNA bantam and its target, Socs36E, as cooperating factors in EGFR-driven tumorigenesis and metastasis in a Drosophila model of epithelial transformation. bantam promotes growth by limiting expression of Socs36E, which functions as a negative growth regulator. Socs36E has only a modest effect on growth on its own, but behaves as a tumor suppressor in combination with EGFR activation. The human ortholog of SOCS36E, SOCS5, behaves as a candidate tumor suppressor in cellular transformation in cooperation with EGFR/RAS pathway activation.