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STAT3: a multifaceted oncoprotein
Aleks C Guanizo1,2, Chamira Dilanka Fernando1,2, Daniel J Garama1,2
1a Centre for Cancer Research , Hudson Institute of Medical Research , Clayton , VIC , Australia.
Growth Factors (Chur, Switzerland)
|June 7, 2018
Summary
Signal transducer and activator of transcription (STAT) 3 is crucial for cell growth and survival. Its complex regulation, including post-translational modifications, influences its dual role as oncogene or tumor suppressor, impacting human diseases.
Area of Science:
- Molecular Biology
- Cellular Signaling
- Oncology
Background:
- Signal transducer and activator of transcription (STAT) 3 is a key signaling protein involved in cellular growth, differentiation, and survival.
- STAT3 dysregulation is implicated in pathologies like hyper IgE syndrome and is found in approximately 50% of human tumors.
- The traditional view of STAT3 as a tyrosine phosphorylated transcription factor is evolving.
Purpose of the Study:
- To explore the complex regulation of STAT3 activity beyond tyrosine phosphorylation.
- To discuss the diverse biological outcomes of STAT3 activation.
- To examine the dual role of STAT3 as either an oncogene or a tumor suppressor.
Main Methods:
- Literature review of STAT3 signaling pathways.
- Analysis of post-translational modifications affecting STAT3 function.
- Examination of STAT3's genomic and non-genomic activities.
Main Results:
- STAT3 regulation involves numerous post-translational modifications beyond tyrosine phosphorylation.
- These modifications impact both nuclear and non-genomic functions of STAT3.
- Emerging evidence suggests STAT3 can act as both an oncogene and a tumor suppressor.
Conclusions:
- STAT3's role in cancer is complex and context-dependent.
- Understanding STAT3's multifaceted regulation is critical for therapeutic strategies.
- Further research is needed to fully elucidate STAT3's oncogenic and tumor-suppressive functions.
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