Genetic Evaluation in Symptomatic Spontaneous Isolated Superior Mesenteric Artery Dissection

Area of Science:

• Genetics
• Vascular Surgery
• Medical Research

Background:

• Isolated superior mesenteric artery dissection (ISMAD) is a rare condition.
• The genetic underpinnings of ISMAD are not fully understood.
• Identifying genetic risk factors can aid in understanding disease mechanisms and patient stratification.

Purpose of the Study:

• To investigate the role of genetic variations in the development of ISMAD.
• To identify specific genes associated with an increased risk of ISMAD.
• To explore the correlation between genetic mutations and treatment outcomes in ISMAD patients.

Main Methods:

• Whole-exome sequencing was performed on 32 ISMAD patients and 83 controls.
• Analysis focused on identifying pathogenic variants in known arterial dissection-related genes.
• Clinical characteristics, treatment strategies, and outcomes were evaluated in relation to genetic findings.

Main Results:

• Pathogenic variants were identified in 34.4% of ISMAD patients.
• COL3A1 and COL12A1 gene variants showed a strong correlation with ISMAD.
• COL3A1 mutations were associated with a higher likelihood of requiring endovascular treatment (P=.02).

Conclusions:

• COL3A1, COL12A1, and TLN1 mutations are potential risk factors for ISMAD.
• Patients with ISMAD and COL3A1 mutations may experience more severe arterial dissection and require endovascular intervention.
• Genetic screening may help identify high-risk ISMAD individuals.