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Author Spotlight: A Computational Pipeline for Analyzing Chimeric Noncoding RNA-Target RNA Interactions in High-Throughput Sequencing Data
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Author Spotlight: A Computational Pipeline for Analyzing Chimeric Noncoding RNA-Target RNA Interactions in High-Throughput Sequencing Data

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Long noncoding RNA and mRNA profiling in cetuximab-resistant colorectal cancer cells by RNA sequencing analysis

Changwen Jing1, Rong Ma1, Haixia Cao1

  • 1Clinical Cancer Research Center, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China.

Cancer Medicine
|March 9, 2019
PubMed

Insights

Researchers identified key molecular changes in colorectal cancer cells resistant to cetuximab. Upregulated long noncoding RNA LINC00973 significantly impacts cell viability and glucose metabolism, offering potential therapeutic targets for cetuximab resistance.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genomics

Background:

  • Cetuximab is a critical therapy for colorectal cancer (CRC).
  • Mechanisms of cetuximab resistance in CRC are not fully understood.
  • Identifying molecular drivers of resistance is crucial for improving treatment outcomes.

Purpose of the Study:

  • To investigate the molecular mechanisms underlying cetuximab resistance in colorectal cancer.
  • To identify differentially expressed noncoding RNAs (ncRNAs) and messenger RNAs (mRNAs) in cetuximab-resistant CRC cells.
  • To explore the functional role of specific long noncoding RNAs (lncRNAs) in cetuximab resistance.

Main Methods:

  • Generation of a cetuximab-resistant colorectal cancer cell line (H508/CR).
  • RNA sequencing to analyze differential expression of ncRNAs and mRNAs.
  • Quantitative real-time PCR for validation of selected lncRNAs.
  • Functional assays to assess the impact of lncRNA manipulation on cell behavior and metabolism.

Main Results:

  • Significant dysregulation of 278 ncRNA transcripts and 1,059 mRNA transcripts observed in resistant cells.
  • Functional analysis suggested involvement of several lncRNAs in cetuximab resistance pathways.
  • Increased glucose consumption and lactate secretion indicated a role for glucose metabolism in resistance.
  • Upregulation of lncRNA LINC00973 was confirmed; its inhibition reduced cell viability, increased apoptosis, and altered glucose metabolism.

Conclusions:

  • The study provides comprehensive data on differentially expressed lncRNAs and mRNAs in cetuximab-resistant CRC.
  • lncRNA LINC00973 emerges as a potential therapeutic target for overcoming cetuximab resistance.
  • Altered glucose metabolism is implicated in cetuximab resistance mechanisms.
Keywords:
mRNARNA-Seqcetuximabcolorectal cancerlncRNA

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