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Author Spotlight: Unveiling Transmembrane Protein Family-Related Markers in Gastric Cancer and Implications for Targeted Therapies
Published on: September 15, 2023
CXCL12/CXCR4 display an inverse mRNA expression profile in gastric carcinoma that correlates with tumor progression
Claudia Rubie1, Anne Kauffels1, Kathrin Kölsch1
1Department of General, Visceral, Vascular and Pediatric Surgery, University of The Saarland, Homburg/Saar D-66421, Germany.
Abstract:
Chemokines and their receptors have been shown to contribute to tumor growth and metastatic spread in various gastrointestinal cancer entities. In the present study, the mRNA expression profiles and clinical significance of chemokine ligand CXCL12 and its corresponding receptor CXCR4 were investigated in patients with gastric cancer (GC). Using quantitative polymerase chain reaction, the expression profile of CXCL12/CXCR4 was analyzed in resection specimens from the patients with GC (n=66) and in corresponding normal gastric tissues. Upon investigating CXCL12/CXCR4 mRNA expression levels in the GC tissues, significant downregulation of CXCL12 expression was demonstrated (P<0.05), whereas CXCR4 mRNA expression was shown to be significantly upregulated (P<0.05). Likewise, in gastric carcinoma patients undergoing neoadjuvant chemotherapy, CXCR4 expression was found to be significantly upregulated (P<0.05), whereas in GC patients with lymph and vein infiltration, CXCL12 mRNA expression was significantly downregulated (P<0.05). These results demonstrate a significant inverse association between the development and progress of GC and CXCL12/CXCR4 mRNA expression. CXCR4 mRNA upregulation was promoted under the effect of neoadjuvant chemotherapy prior to surgery in GC patients, whereas higher tumor stages with lymph and vein infiltration negatively affected CXCL12 mRNA expression.
Insights
This study found that chemokine ligand CXCL12 is downregulated while its receptor CXCR4 is upregulated in gastric cancer (GC). This inverse association suggests a role for CXCL12/CXCR4 in GC progression and response to chemotherapy.
Area of Science:
- Oncology
- Molecular Biology
- Immunology
Background:
- Chemokines and receptors influence tumor growth and metastasis in gastrointestinal cancers.
- The CXCL12/CXCR4 axis is implicated in various cancer types.
- Understanding their role in gastric cancer (GC) is crucial for targeted therapies.
Purpose of the Study:
- To investigate the mRNA expression profiles of CXCL12 and CXCR4 in gastric cancer.
- To determine the clinical significance of CXCL12 and CXCR4 expression in GC patients.
- To explore the association between CXCL12/CXCR4 expression and GC progression.
Main Methods:
- Quantitative polymerase chain reaction (qPCR) was used to analyze mRNA expression.
- Resection specimens from GC patients (n=66) and normal gastric tissues were compared.
- Expression levels were correlated with clinical parameters like neoadjuvant chemotherapy and tumor infiltration.
Main Results:
- CXCL12 mRNA expression was significantly downregulated in GC tissues compared to normal tissues (P<0.05).
- CXCR4 mRNA expression was significantly upregulated in GC tissues (P<0.05).
- CXCR4 was upregulated in patients receiving neoadjuvant chemotherapy, while CXCL12 was downregulated in patients with lymph/vein infiltration.
Conclusions:
- A significant inverse association exists between CXCL12/CXCR4 mRNA expression and GC development/progression.
- Neoadjuvant chemotherapy promotes CXCR4 upregulation.
- Lymph and vein infiltration negatively impacts CXCL12 mRNA expression, suggesting its role in GC metastasis.
