STAT3 is a Master Regulator of Epithelial Identity and KRAS-driven Tumorigenesis
Overview
Affiliations
A dichotomy exists regarding the role of signal transducer and activator of transcription 3 (STAT3) in cancer. Functional and genetic studies demonstrate either an intrinsic requirement for STAT3 or a suppressive effect on common types of cancer. These contrasting actions of STAT3 imply context dependency. To examine mechanisms that underlie STAT3 function in cancer, we evaluated the impact of STAT3 activity in KRAS-driven lung and pancreatic cancer. Our study defines a fundamental and previously unrecognized function of STAT3 in the maintenance of epithelial cell identity and differentiation. Loss of STAT3 preferentially associates with the acquisition of mesenchymal-like phenotypes and more aggressive tumor behavior. In contrast, persistent STAT3 activation through Tyr705 phosphorylation confers a differentiated epithelial morphology that impacts tumorigenic potential. Our results imply a mechanism in which quantitative differences of STAT3 Tyr705 phosphorylation, as compared with other activation modes, direct discrete outcomes in tumor progression.
The HOXC10/NOD1/ERK axis drives osteolytic bone metastasis of pan-KRAS-mutant lung cancer.
Li K, Yang B, Du Y, Ding Y, Shen S, Sun Z Bone Res. 2024; 12(1):47.
PMID: 39191757 PMC: 11349752. DOI: 10.1038/s41413-024-00350-8.
The Janus kinase 1 is critical for pancreatic cancer initiation and progression.
Shrestha H, Radler P, Dennaoui R, Wicker M, Rajbhandari N, Sun Y Cell Rep. 2024; 43(5):114202.
PMID: 38733583 PMC: 11194014. DOI: 10.1016/j.celrep.2024.114202.
STAT3 is a genetic modifier of TGF-beta induced EMT in KRAS mutant pancreatic cancer.
DAmico S, Kirillov V, Petrenko O, Reich N Elife. 2024; 13.
PMID: 38573819 PMC: 10994661. DOI: 10.7554/eLife.92559.
The roles of JAK2/STAT3 signaling in fusion of the secondary palate.
Yoshida N, Inubushi T, Hirose T, Aoyama G, Kurosaka H, Yamashiro T Dis Model Mech. 2023; 16(10).
PMID: 37846594 PMC: 10602007. DOI: 10.1242/dmm.050085.
Wang J, Weng S, Zhu Y, Chen H, Pan J, Qiu S J Cell Commun Signal. 2023; 17(4):1417-1433.
PMID: 37548811 PMC: 10713918. DOI: 10.1007/s12079-023-00780-9.