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LncRNA RASAL2-AS1 promotes METTL14-mediated m6A methylation in the proliferation and progression of head and neck
Meiting Rong1,2, Ming Zhang1, Feihong Dong1
1The Second Affiliated Hospital of Dalian Medical University, #467 Zhongshan Road, Dalian, 116023, China.
Cancer Cell International
|March 26, 2024
Summary
Long non-coding RNA RASAL2-AS1 promotes head and neck squamous cell carcinoma (HNSCC) progression by regulating the METTL14/LIS1 pathway. This lncRNA may serve as a prognostic marker and therapeutic target for HNSCC.
Area of Science:
- Oncology
- Molecular Biology
- Epigenetics
Background:
- Long non-coding RNAs (lncRNAs) are crucial epigenetic regulators involved in tumor initiation and progression.
- The specific roles and regulatory mechanisms of lncRNAs in head and neck squamous cell carcinoma (HNSCC) are not fully understood.
- This study investigates the function of lncRNA RASAL2-AS1 in HNSCC development.
Purpose of the Study:
- To elucidate the molecular mechanisms of lncRNA RASAL2-AS1 in the occurrence and development of HNSCC.
- To explore the regulatory role of RASAL2-AS1 in the METTL14/LIS1 signaling pathway within HNSCC.
- To assess the potential of RASAL2-AS1 as a prognostic biomarker and therapeutic target for HNSCC.
Main Methods:
- Bioinformatic analysis of RASAL2-AS1 expression in HNSCC and normal tissues.
- RT-PCR and Western blotting to quantify RASAL2-AS1 mRNA and protein levels.
- In vitro assays (wound healing, transwell, flow cytometry) and in vivo (xenograft model) to evaluate functional roles.
- m6A dot blot and RNA immunoprecipitation to investigate molecular interactions.
- Immunohistochemistry to assess METTL14 and LIS1 expression in patient tissues.
Main Results:
- RASAL2-AS1 was highly expressed in HNSCC tissues and correlated with poorer survival rates.
- Overexpression of RASAL2-AS1 promoted HNSCC cell migration, proliferation, and S-phase cell cycle, while knockdown inhibited G1 phase.
- RASAL2-AS1 regulated LIS1 expression, and its effects were dependent on the METTL14/LIS1 pathway.
- RASAL2-AS1 overexpression increased tumor weight and volume in vivo, an effect reversed by METTL14 silencing.
Conclusions:
- LncRNA RASAL2-AS1 plays a significant functional role in HNSCC progression.
- RASAL2-AS1 regulates HNSCC through an m6A-dependent manner involving the METTL14/LIS1 pathway.
- RASAL2-AS1 may serve as a valuable prognostic biomarker and potential therapeutic target for HNSCC.
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