Related Experiment Video
Updated: Jul 13, 2025
09:58
Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis
Published on: June 27, 2020
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New JAK3-INSL3 Fusion Transcript-An Oncogenic Event in Cutaneous T-Cell Lymphoma
Loka Reddy Velatooru1, Cheng Hui Hu1, Pedram Bijani1
1Department of Dermatology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
Cells
|October 13, 2023
Summary
A novel JAK3-INSL3 fusion transcript drives cancer in cutaneous T-cell lymphoma (CTCL). High expression correlates with poor survival, and its inhibition reduces CTCL cell growth and tumor formation.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Constitutively activated Janus kinase 3 (JAK3) is linked to cutaneous T-cell lymphoma (CTCL) pathogenesis.
- Mechanisms of JAK3 activation in CTCL remain unclear, with mutations found in a minority of patients.
Purpose of the Study:
- To investigate the oncogenic role of a newly identified JAK3-INSL3 fusion transcript in CTCL.
- To correlate JAK3-INSL3 expression levels with patient survival and cellular behavior.
Main Methods:
- RT-PCR and Sanger sequencing to detect JAK3-INSL3 fusion transcript in 33 Sézary syndrome (SS) patients.
- Quantitative PCR (qPCR) to assess expression levels and correlate with survival.
- RNA interference and CRISPR/Cas9 gene editing for knockdown/knockout studies in CTCL cell lines (MJ and HH).
- NSG xenograft mouse models to evaluate tumor growth after gene editing.
Main Results:
- JAK3-INSL3 fusion transcript was detected in SS patients with heterogeneous expression levels.
- High JAK3-INSL3 expression was associated with significantly poorer 5-year survival (42.1%) compared to low expression (78.6%).
- Inhibition of JAK3-INSL3 reduced CTCL cell proliferation, colony formation, and tumor size in vivo.
Conclusions:
- The JAK3-INSL3 fusion transcript represents a novel oncogenic event in CTCL.
- Targeting JAK3-INSL3 may offer a therapeutic strategy for CTCL patients.
- Further research into JAK3 activation mechanisms in CTCL is warranted.
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