Functional interplay between YY1 and CARM1 promotes oral carcinogenesis

Area of Science:

• Molecular Biology
• Oncology
• Epigenetics

Background:

• Coactivator associated arginine methyltransferase 1 (CARM1) is implicated in pluripotency, differentiation, and tumorigenesis.
• CARM1 exhibits oncogenic functions in colorectal and breast cancers, often due to overexpression.
• The mechanisms driving CARM1 dysregulation in cancer remain largely unelucidated.

Purpose of the Study:

• To investigate the role of CARM1 in oral cancer.
• To identify regulatory mechanisms of CARM1 expression in oral cancer.
• To explore the functional relationship between CARM1 and YY1 in oral cancer progression.

Main Methods:

• Analysis of CARM1 and YY1 expression in oral cancer tissues and cell lines.
• Gene silencing experiments (YY1) in oral cancer cell lines.
• Cell line-based assays and xenograft studies to assess neoplastic functions.
• Transcriptomics analysis and qRT-PCR for gene expression profiling.
• In vivo reporter gene assays to study CARM1-YY1 interaction.

Main Results:

• CARM1 is overexpressed in oral cancer, exhibiting an oncogenic function.
• YY1 acts as a positive regulator of CARM1 gene expression and is overexpressed in oral cancer.
• YY1 demonstrates pro-neoplastic functions, including promoting proliferation, angiogenesis, and metastasis.
• CARM1 methylates YY1, enhancing YY1-mediated reporter gene activation.
• A positive feedback loop exists between CARM1 and YY1, driving oral cancer progression.

Conclusions:

• CARM1 and YY1 form a positive feedback loop that promotes oral cancer development and progression.
• Targeting the CARM1-YY1 axis represents a potential therapeutic strategy for oral cancer.