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Long Non-coding RNA TPRG1-AS1 Interacts With CLTC in Liver Cancer Cells
Sung Ung Moon1, Masaud Shah1, Trinh Thanh Thao1
1Department of Physiology, Ajou University School of Medicine, Suwon, Republic of Korea.
Anticancer Research
|October 30, 2024
Summary
Long non-coding RNA TPRG1-AS1 directly interacts with Clathrin Heavy Chain (CLTC) to suppress liver cancer growth by inhibiting Epidermal Growth Factor (EGF) signaling.
Area of Science:
- Molecular Biology
- Cancer Research
- RNA Biology
Background:
- Long non-coding RNAs (lncRNAs) are increasingly recognized for their roles in cancer.
- Some lncRNAs function as tumor suppressors, inhibiting tumor progression.
- The specific mechanisms of lncRNA-mediated tumor suppression are under active investigation.
Purpose of the Study:
- To investigate the tumor-suppressive mechanism of lncRNA TPRG1-AS1.
- To elucidate the direct interaction between TPRG1-AS1 and Clathrin Heavy Chain (CLTC).
- To determine the role of this interaction in the Epidermal Growth Factor (EGF) signaling pathway.
Main Methods:
- RNA pulldown and RNA immunoprecipitation (RIP)-qPCR to confirm TPRG1-AS1 and CLTC interaction.
- Cell viability, sphere formation, and invasion assays to assess phenotypic changes.
- Immunoblotting and immunocytochemistry to confirm the underlying molecular mechanisms.
- Custom HEX probe assay to verify binding and signaling suppression.
Main Results:
- TPRG1-AS1 directly interacts with CLTC.
- Overexpression of TPRG1-AS1 (TPRG1-AS1oe) suppressed EGF downstream signaling, including MAPK8 and MAPK14.
- This interaction led to reduced cell viability, sphere formation, and invasion in liver cancer cells.
- TPRG1-AS1oe binding to CLTC attenuated EGF signaling.
Conclusions:
- A novel regulatory axis involving TPRG1-AS1 and CLTC was identified.
- TPRG1-AS1 interacts with CLTC to attenuate EGF downstream signaling, specifically MAPK8 and MAPK14 pathways.
- This interaction contributes to the tumor-suppressive effects observed in liver cancer cells.
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