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Low prostaglandin-endoperoxide synthase-2 gene expression in colorectal carcinomas may predict poorer survival

  • 0Department of Histopathology, Federal University of Health Sciences Azare, Azare 751101, Bauchi, Nigeria.
Ecancermedicalscience +

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April 2, 2025

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April 2, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Colorectal carcinoma (CRC) patients with low Prostaglandin-endoperoxide synthase-2 (PTGS2) expression show poorer overall survival. This suggests a need for tailored therapies and closer monitoring for these CRC patients.

Area Of Science

  • Oncology
  • Molecular Biology
  • Cancer Genomics

Background

  • Prostaglandin-endoperoxide synthase-2 (PTGS2/COX-2) is overexpressed in colorectal carcinoma (CRC) compared to normal tissues.
  • The prognostic impact of differential PTGS2 expression within PTGS2-positive CRC tumors remains under-investigated.
  • Understanding PTGS2 expression variability is crucial for refining CRC patient stratification and treatment strategies.

Purpose Of The Study

  • To investigate the association between differential PTGS2 expression levels and colorectal carcinoma (CRC) patient outcomes.
  • To explore the relationship between PTGS2 expression, clinicopathological features, and gene methylation status in CRC.
  • To determine the prognostic significance of PTGS2 expression sub-stratification in CRC.

Main Methods

  • Utilized The Cancer Genome Atlas (TCGA) database for CRC cases with RNA-Seq transcript data and matched clinicopathological information.
  • Analyzed gene copy number variation and methylation status alongside PTGS2 expression.
  • Employed statistical analyses including chi-square, logistic regression, and Kaplan-Meier survival analysis (p < 0.05 significance).

Main Results

  • PTGS2 expression varied significantly across 534 CRC cases (Median 1.4 FPKM).
  • Lower PTGS2 expression was significantly associated with specific histological subtypes, lymphovascular invasion, pN2 stage, and AJCC stage.
  • Histological differentiation and gene methylation were predictors of reduced PTGS2 expression; overall survival was significantly poorer in patients with low PTGS2 tumors (p = 0.018).

Conclusions

  • Colorectal carcinomas exhibiting low PTGS2 transcript levels are linked to inferior overall survival.
  • These findings highlight the prognostic value of PTGS2 expression sub-stratification in CRC.
  • Suggests a need for enhanced patient follow-up and personalized adjuvant therapy for individuals with low PTGS2 CRC.

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