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Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
Published on: June 6, 2017
Thioredoxin regulates cell cycle via the ERK1/2-cyclin D1 pathway
Michika Mochizuki1, Yong-Won Kwon, Junji Yodoi
1Department of Biological Responses, Institute for Virus Research, Kyoto, Japan.
Antioxidants & Redox Signaling
|July 23, 2009
Summary
Thioredoxin (TRX) regulates cell survival and growth. Knocking down TRX enhances cancer cell death and arrests the cell cycle by affecting cyclin D1 and ERK/AP-1 pathways.
Area of Science:
- Molecular Biology
- Cell Biology
- Cancer Research
Background:
- Thioredoxin (TRX) is crucial for redox regulation, impacting cell survival and growth.
- Understanding TRX's molecular mechanisms is vital for cancer therapy development.
Purpose of the Study:
- To investigate the role of Thioredoxin (TRX) in regulating cell survival and growth.
- To elucidate the molecular mechanisms underlying TRX's function in cancer cells.
Main Methods:
- RNA interference (RNAi) was used to knock down TRX expression in A549 lung and MCF7 breast cancer cells.
- Cell death, cell cycle progression, cyclin D1 expression, and ERK/AP-1 signaling pathway activation were analyzed.
Main Results:
- TRX knockdown enhanced cisplatin (CDDP)-induced cell death but did not increase basal cell death.
- TRX knockdown led to G(1) phase cell-cycle arrest, reduced cyclin D1 expression, and suppressed cyclin D1 promoter activity.
- TRX knockdown inhibited ERK1/2 phosphorylation and EGF-induced nuclear translocation of ERK1/2.
Conclusions:
- Thioredoxin (TRX) is a significant regulator of the G(1) cell cycle phase.
- TRX influences cell cycle progression through cyclin D1 transcription and the ERK/AP-1 signaling pathway.
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