Do extracellular-matrix-regulating enzymes play a role in cervical artery dissection?

Area of Science:

• Vascular Biology
• Biochemistry
• Neurology

Background:

• Spontaneous cervical artery dissection (SCAD) is suspected to involve extracellular matrix defects.
• Matrix metalloproteinases (MMPs) and elastase are key enzymes in vascular wall remodeling.

Purpose of the Study:

• To investigate if plasma levels of MMP-2, MMP-9, and elastase are altered in SCAD patients.
• To explore the association between these enzymes and SCAD, including severity.

Main Methods:

• Prospective recruitment of 47 SCAD patients and 52 ischemic stroke controls across two centers.
• Measurement of plasma MMP-2, MMP-9, and elastase levels three months post-event.

Main Results:

• SCAD patients exhibited higher mean MMP-2 levels compared to controls (p=0.11).
• A significantly higher proportion of SCAD patients had elevated MMP-2 levels (77.8% vs 54.5%, p=0.019).
• Elevated MMP-2 was more pronounced in patients with multiple dissections.
• MMP-9 and elastase levels did not differ significantly between groups, but high levels were more frequent in multiple dissection cases.

Conclusions:

• SCAD patients demonstrate increased plasma protease levels, particularly MMP-2.
• The association between elevated MMP-2 and SCAD is stronger in cases involving multiple arterial dissections.