MiR-21, miR-126 and miR-181b expression in Thromboangiitis obliterans

Area of Science:

• Molecular Biology
• Vascular Inflammation
• Biomarker Discovery

Background:

• NF-kB pathway by-products are implicated in thromboangiitis obliterans (TAO).
• The role of microRNAs (miRNAs) 21, 126, and 181b, linked to the NF-kB pathway, in TAO activation remains unclear.

Purpose of the Study:

• To investigate the serum levels of miR-21, miR-126, and miR-181b in TAO patients.
• To assess the correlation of these microRNAs with TAO disease activity and smoking status.

Main Methods:

• Serum samples were collected from TAO patients at two time points (TAO-1 and TAO-2) and compared to healthy controls (smokers, former smokers, never smokers).
• Quantitative analysis of miR-21, miR-126, and miR-181b serum levels was performed.

Main Results:

• Three TAO patients showed disease activation between sample collections, accompanied by elevated miRNA levels.
• Overexpression of miR-21 was observed in TAO-2 patients compared to all control groups (p<0.03).
• miR-126 and miR-181b were overexpressed in TAO-2 patients compared to never smokers (p=0.02 and p=0.04, respectively).

Conclusions:

• Serum levels of miR-21, miR-126, and miR-181b appear to be upregulated in TAO patients.
• These microRNAs may correlate with increased disease activity in TAO.
• Further large-scale studies are required to validate their potential as biomarkers for TAO activity.