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Updated: May 23, 2026
09:52
A Chromatin Immunoprecipitation Assay to Identify Novel NFAT2 Target Genes in Chronic Lymphocytic Leukemia
Published on: December 4, 2018
Expression and function of FRA2/JUND in cutaneous T-cell lymphomas
Takashi Nakayama1, Tomonori Higuchi, Naoki Oiso
1Department of Microbiology, Kinki University Faculty of Medicine, Osaka-Sayama, Osaka, Japan.
Anticancer Research
|April 12, 2012
Summary
A common oncogenic pathway involving FRA2/JUND drives CC chemokine receptor 4 (CCR4) expression in mature T-cell cancers like ATLL and CTCL. This discovery offers new therapeutic targets for these lymphomas.
Area of Science:
- Oncology
- Molecular Biology
- Immunology
Background:
- Adult T-cell leukemia/lymphoma (ATLL) and cutaneous T-cell lymphomas (CTCLs) frequently express CC chemokine receptor 4 (CCR4).
- Previous research identified activating protein 1 (AP1) family member FRA2 and JUND up-regulating CCR4 and proto-oncogenes in ATLL.
Purpose of the Study:
- To investigate the expression of FRA2, JUND, CCR4, MYB, MDM2, and BCL6 in clinical samples of CTCL.
- To determine the role of FRA2 and JUND in CTCL cell growth and gene expression.
Main Methods:
- Gene expression analysis (transcript and protein levels) in CTCL skin lesions.
- siRNA-mediated knockdown of FRA2 and JUND in CTCL cell lines.
- Cell growth assays.
Main Results:
- High levels of FRA2, JUND, CCR4, MYB, MDM2, and BCL6 transcripts were detected in CTCL skin lesions.
- FRA2, JUND, CCR4, MYB, and MDM2 proteins were confirmed in CTCL skin lesions.
- Knockdown of FRA2 or JUND suppressed CTCL cell growth and reduced expression of CCR4, MYB, MDM2, and BCL6.
Conclusions:
- A common oncogenic cascade initiated by FRA2/JUND exists in CCR4-expressing mature T-cell malignancies, including ATLL and CTCL.
- FRA2 and JUND play crucial roles in the proliferation and gene expression of CTCL.
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