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Role of STAT3 in Genesis and Progression of Human Malignant Gliomas
Zangbéwendé Guy Ouédraogo1,2,3, Julian Biau1,2,4, Jean-Louis Kemeny1,5
1Clermont Université, Université d'Auvergne, EA 7283, CREaT, BP 10448, F-63000, Clermont-Ferrand, France.
Abstract:
Signal transducer and activator of transcription 3 (STAT3) is aberrantly activated in glioblastoma and has been identified as a relevant therapeutic target in this disease and many other human cancers. After two decades of intensive research, there is not yet any approved STAT3-based glioma therapy. In addition to the canonical activation by tyrosine 705 phosphorylation, concordant reports described a potential therapeutic relevance of other post-translational modifications including mainly serine 727 phosphorylation. Such reports reinforce the need to refine the strategy of targeting STAT3 in each concerned disease. This review focuses on the role of serine 727 and tyrosine 705 phosphorylation of STAT3 in glioma. It explores their contribution to glial cell transformation and to the mechanisms that make glioma escape to both immune control and standard treatment.
Insights
Targeting Signal transducer and activator of transcription 3 (STAT3) in glioblastoma is crucial. This review examines STAT3
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Signal transducer and activator of transcription 3 (STAT3) is frequently activated in glioblastoma.
- STAT3 is a recognized therapeutic target in glioblastoma and other cancers, yet no approved therapies exist.
- STAT3 activation occurs via tyrosine 705 phosphorylation, with emerging evidence for serine 727 phosphorylation's role.
Purpose of the Study:
- To review the role of STAT3 phosphorylation at serine 727 and tyrosine 705 in glioma.
- To explore how these phosphorylation events contribute to glioblastoma development and immune evasion.
- To discuss the implications for refining therapeutic strategies targeting STAT3 in glioma.
Main Methods:
- Literature review of studies investigating STAT3 phosphorylation in glioma.
- Analysis of canonical and non-canonical STAT3 activation pathways.
- Examination of STAT3's involvement in glioblastoma pathogenesis and treatment resistance.
Main Results:
- STAT3 phosphorylation at both serine 727 and tyrosine 705 is implicated in glioblastoma.
- These modifications contribute to glial cell transformation and tumor progression.
- STAT3 signaling pathways facilitate glioma's evasion of immune surveillance and standard therapies.
Conclusions:
- Understanding the distinct roles of STAT3 serine 727 and tyrosine 705 phosphorylation is vital for effective glioblastoma treatment.
- Targeting STAT3 requires nuanced strategies that consider its complex post-translational modifications.
- Further research into STAT3 signaling is essential for developing novel, approved therapies for glioma.
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