Mendelian Randomization Suggests a Causal Link Between Glycemic Traits and Thoracic Aortic Structures and Diseases

Area of Science:

• Cardiovascular Medicine
• Endocrinology
• Genetics

Background:

• Glycemic traits, including type 2 diabetes mellitus (T2DM), fasting glucose, and glycated hemoglobin (HbA1c), are critical health indicators.
• Thoracic aortic aneurysm (aortic dilatation) is a significant cardiovascular disease with serious prognosis.
• The interplay between metabolic health and aortic disease progression remains an area of active research.

Purpose of the Study:

• To investigate the association between various glycemic traits and thoracic aortic morphology.
• To explore the relationship between glycemic control and the risk of thoracic aortic aneurysm.
• To identify genetic factors mediating the link between glycemic traits and aortic disease.

Main Methods:

• Utilized genetic data and phenotypic information to analyze associations.
• Examined correlations between type 2 diabetes mellitus, fasting glucose, fasting insulin, HbA1c, and 2-hour post-load glucose with thoracic aortic measurements.
• Employed genetic predictors related to beta-cell function and proinsulin processing in T2DM.

Main Results:

• An inverse association was observed between elevated glycemic traits and thoracic aortic morphology.
• Higher glycemic trait levels correlated with a reduced risk of developing thoracic aortic aneurysm.
• Genetic predictors linked to beta-cell proinsulin mechanisms in T2DM were identified as significant drivers.

Conclusions:

• Glycemic control plays a crucial role in thoracic aortic health and aneurysm development.
• Genes such as AGER, GLRX, TCF7L2, and GCK, involved in glycemic regulation, are implicated in thoracic aortic aneurysm.
• These findings suggest potential therapeutic targets for managing aortic diseases through glycemic control strategies.