Long noncoding RNA expression profile analysis of colorectal cancer and metastatic lymph node based on microarray...

Area of Science:

• Molecular Biology
• Oncology
• Genetics

Background:

• Long noncoding RNAs (lncRNAs) play crucial roles in biological processes.
• The involvement of lncRNAs in colorectal cancer (CRC) metastasis is not fully understood.
• Identifying specific lncRNAs associated with lymph node metastasis in CRC is essential.

Purpose of the Study:

• To identify dysregulated lncRNA and mRNA transcripts in colorectal cancer (CRC) with lymph node metastasis.
• To explore the potential regulatory roles of lncRNAs in CRC metastasis.
• To investigate the functional association of a specific lncRNA (ENST00000430471) with CRC cell behavior.

Main Methods:

• Transcriptome analysis comparing tumor tissues with paired metastatic lymph nodes.
• Identification of differentially expressed lncRNA and mRNA transcripts.
• Functional prediction analysis of lncRNAs based on coexpression networks.
• Experimental validation of a representative lncRNA's role in CRC cell proliferation and invasion.

Main Results:

• A total of 390 lncRNA transcripts and 508 mRNA transcripts were found to be dysregulated.
• Functional prediction suggested lncRNAs are involved in CRC metastasis pathways through cis- and trans-regulation.
• The lncRNA ENST00000430471 was significantly associated with increased CRC cell proliferation and invasion.

Conclusions:

• Aberrant lncRNAs are implicated in the biological progression of colorectal cancer (CRC) with lymph node metastasis.
• lncRNAs may contribute to CRC metastasis by regulating coexpressed genes.
• Further research into the identified lncRNAs, such as ENST00000430471, is warranted to elucidate CRC metastatic pathogenesis.