PIAS3-mediated feedback loops promote chronic colitis-associated malignant transformation
Junting Ma1, Yaping Yang1, Yong Fu1
1State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210046, China.
Theranostics
|June 14, 2018
Summary
Protein inhibitor of activated STAT 3 (PIAS3) feedback loops drive colitis-associated colorectal cancer (CAC) progression by controlling cell proliferation. Targeting these PIAS3 loops may offer new therapeutic strategies for CAC.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Colitis-associated colorectal cancer (CAC) progresses rapidly and is resistant to therapy.
- The role of PIAS3 (protein inhibitor of activated STAT) in CAC is largely unknown.
- Understanding PIAS3's function is crucial for developing novel CAC treatments.
Purpose of the Study:
- To investigate the biological mechanisms of PIAS3 in CAC.
- To elucidate the role of PIAS3 in regulating cell proliferation and feedback loops in CAC.
- To evaluate PIAS3 as a potential therapeutic target for CAC.
Main Methods:
- Examined PIAS3 expression in human CAC/CRC tissues and AOM-DSS induced mouse models.
- Utilized in vitro, in vivo, and clinical approaches to study PIAS3 function.
- Investigated PIAS3-mediated feedback loops involving NF-κB, STAT3, and miR-18a.
Main Results:
- Downregulated PIAS3 and upregulated miR-18a were observed in CAC tissues.
- PIAS3 inhibited NF-κB and STAT3 activation, which in turn regulated miR-18a levels.
- PIAS3-mediated feedback loops (PIAS3/NF-κB/miR-18a and PIAS3/STAT3/miR-18a) controlled cell proliferation.
- Modulating these loops inhibited tumor growth in mouse models.
Conclusions:
- PIAS3-mediated feedback loops are key drivers of CAC progression.
- Targeting these feedback loops presents a promising therapeutic strategy for CAC.
- PIAS3 plays a critical role in regulating CAC cell proliferation and tumor development.
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