Targeting COX-2 and Akt1 to Inhibit Gastric Adenocarcinoma and Glioma Cell Growth

Strategic Insights -

Researchers at Tianjin Medical University have made a significant breakthrough in the fight against malignant tumors, specifically gastric adenocarcinoma and glioma. J. Zhang and colleagues used adenovirus-mediated small hairpin RNA (shRNA) expression vectors to target cyclooxygenase-2 (COX-2) and protein kinase B (Akt1), crucial molecules involved in tumor formation. Their innovative approach showed promising results, demonstrating the potential for combined gene therapy in treating malignant tumors.

Key Takeaways:

  • The study found that phosphorylated Akt (p-Akt) and COX-2 were overexpressed in gastric adenocarcinomas and their expression levels increased with tumor malignancy.
  • Adenovirus-mediated shRNA targeting COX-2 and Akt1 significantly downregulated their expression, resulting in an inhibitory effect on SGC-7901 gastric adenocarcinoma and U251 glioma cell growth.
  • The expression vectors rAd5-Akt1+COX-2 (rAd5-A+C) inhibited cell proliferation by over 70%, as indicated by a MTT assay, and slowed cell invasion and apoptosis.
  • The treatment group showed a significant decrease in cell invasion (36.2[+ or -]3.1) compared to the control group (105.0[+ or -]4.0) and nonsense sequence group (102.5[+ or -]6.4).
  • The study also demonstrated the potential for combined gene therapy in treating malignant tumors, providing evidence for its effectiveness in inhibiting tumor growth.

Statistics:

  • Cell growth was inhibited by over 70% in the rAd5-A+C treated group, as indicated by a MTT assay.
  • The number of cells invading through the Matrigel in the rAd5-A+C treated group was significantly decreased (36.2[+ or -]3.1) compared to the control group (105.0[+ or -]4.0) and nonsense sequence group (102.5[+ or -]6.4).
  • Tumor volumes in the SGC-7901 subcutaneous nude mouse model treated with rAd5-A+C were significantly smaller than those of the control group and nonsense sequence group.

Sources:

  • Zhang, J., et al. (2009). Expression of p-Akt and COX-2 in gastric adenocarcinomas and adenovirus mediated Akt1 and COX-2 shRNA suppresses SGC-7901 gastric adenocarcinoma and U251 glioma cell growth in vitro and in vivo. Technology In Cancer Research and Treatment, 8(6), 467-478.
  • Tianjin Medical University General Hospital, Gastroenterology, 154 An-Shan Road, Heping District, Tianjin 300052, People's Republic of China.