Gene Expression Signatures of Smoking and Acute Myocardial Infarction: A Blood Transcriptome Analysis

Area of Science:

• Cardiovascular Disease Research
• Molecular Biology
• Genomics

Background:

• Smoking is a major risk factor for cardiovascular diseases like hypertension and myocardial infarction (MI).
• The exact molecular mechanisms linking smoking to cardiovascular disease remain unclear.
• Understanding these links is crucial for developing preventative and therapeutic strategies.

Purpose of the Study:

• To identify shared molecular signatures in blood that connect smoking exposure to acute myocardial infarction (AMI).
• To investigate the role of gene expression changes in smoking-related cardiovascular risk.

Main Methods:

• Meta-analysis of seven blood transcriptome microarray datasets from the Gene Expression Omnibus (GEO) database (403 patients).
• Identification of differentially expressed genes (DEGs) associated with AMI and smoking.
• Functional enrichment analysis and validation of key genes using independent datasets and qRT-PCR.

Main Results:

• DEGs linked to AMI and smoking were significantly enriched in immune response and inflammation pathways.
• Three genes (PTGDR, PYHIN1, PRSS23) showed consistent alterations in both smoking and AMI.
• PYHIN1 and PRSS23 dysregulation in AMI was confirmed by qRT-PCR.

Conclusions:

• Smoking-induced blood gene expression changes may contribute to AMI risk.
• The identified genes (PTGDR, PYHIN1, PRSS23) are implicated in AMI pathogenesis.
• These genes could serve as blood-based biomarkers for cardiovascular risk assessment in smokers.