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|September 27, 2025
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Summary

High levels of Interleukin-6 (IL-6) and retinol-binding protein 4 (RBP4) in colorectal cancer (CRC) tissues are linked to worse outcomes. These biomarkers may indicate inflammation and metabolic issues in CRC progression.

Keywords:
Il-6RBP4colorectal cancerprognostic factor

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Area of Science:

  • Oncology
  • Molecular Biology
  • Metabolism

Background:

  • Colorectal cancer (CRC) is a major global health concern, with inflammation and metabolic dysregulation contributing to its progression.
  • Interleukin-6 (IL-6) and retinol-binding protein 4 (RBP4) are implicated as key mediators in these processes.
  • Obesity-related metabolic dysfunction is increasingly recognized as a factor in CRC development.

Purpose of the Study:

  • To investigate the expression levels of IL-6 and RBP4 in CRC tissues.
  • To correlate IL-6 and RBP4 expression with clinicopathological features and patient survival.
  • To explore the molecular networks and signaling pathways associated with IL-6 and RBP4 in CRC using in silico methods.

Main Methods:

  • Immunohistochemistry was used to quantify IL-6 and RBP4 expression in 118 CRC and adjacent normal tissues.
  • Expression levels (H-score) were correlated with clinical parameters and survival via Kaplan-Meier analysis.
  • In silico analyses utilized TCGA RNA-seq data for pathway enrichment, gene co-expression, and protein-protein interaction networks.

Main Results:

  • IL-6 and RBP4 expression were significantly higher in CRC tissues compared to normal tissues.
  • High IL-6 correlated with patient age and obesity; RBP4 correlated with advanced tumor stage, lymph node metastasis, and obesity.
  • Elevated IL-6 or RBP4 levels were associated with significantly shorter overall survival.
  • In silico analysis revealed immune-related pathways for IL-6 and developmental signaling for RBP4.

Conclusions:

  • Elevated IL-6 and RBP4 expression in CRC tissues are associated with adverse clinicopathological features and poorer prognosis.
  • These findings highlight the roles of inflammation and metabolic dysfunction in CRC progression.
  • IL-6 and RBP4 show potential as prognostic biomarkers and therapeutic targets for colorectal cancer.