The Reticulon-4 3-bp Deletion/Insertion Polymorphism Is Associated with Structural mRNA Changes and the Risk of...

Area of Science:

• Genetics
• Oncology
• Molecular Biology

Background:

• Breast cancer (BC) arises from molecular disruptions affecting cell death.
• Identifying novel biomarkers is crucial for understanding and treating BC.
• The reticulon-4 (RTN4) gene, encoding Nogo proteins, is implicated in apoptosis and cancer.

Purpose of the Study:

• To investigate the association between the RTN4 gene variant rs34917480 and BC risk in an Iranian population.
• To predict the functional impact of rs34917480 on RTN4 mRNA structure and its protein-protein interaction network (PPIN).

Main Methods:

• Case-control study involving 212 BC patients and 225 healthy controls.
• Genotyping of rs34917480 using Amplification-Refractory Mutation System-Polymerase Chain Reaction (AS-PCR).
• mRNA secondary structure prediction using RNAfold and PPIN construction via the STRING database.

Main Results:

• The rs34917480 variant showed a statistically significant association with decreased BC risk across multiple genetic models (heterozygous, dominant, over-dominant, allelic).
• Computational predictions indicated that rs34917480 may alter RTN4 mRNA thermodynamics and potentially affect protein translation.
• RTN4's PPIN analysis highlighted its involvement in apoptosis regulation and key signaling pathways relevant to BC.

Conclusions:

• The rs34917480 variant in the RTN4 gene is identified as a potential protective factor against breast cancer in the studied Iranian cohort.
• These findings suggest that rs34917480 may influence BC risk through mechanisms affecting mRNA structure and protein interactions.
• RTN4 and its genetic variations represent a promising area for future BC biomarker research.