Insulin resistance and hypertension

Area of Science:

• Endocrinology
• Metabolic Disorders
• Cardiovascular Disease

Background:

• Hypertension is frequently associated with metabolic abnormalities.
• Understanding insulin sensitivity in hypertensive patients with varying glucose tolerance is crucial for disease management.

Purpose of the Study:

• To investigate insulin sensitivity and insulin resistance in hypertensive patients across different glucose tolerance statuses (normal glucose tolerance, impaired glucose tolerance, type 2 diabetes).
• To analyze the relationship between insulin resistance, glucose metabolism disorders, and hypertension.

Main Methods:

• Utilized glucose tolerance tests and insulin release tests.
• Calculated insulin sensitivity index (ISI) and the ratio of the area under the glucose tolerance curve (AUCG) to the area under the insulin release curve (AUCI).

Main Results:

• Insulin sensitivity index (ISI) was reduced in hypertensive patients, with the most significant reduction observed in those with type 2 diabetes and impaired glucose tolerance.
• A significant difference in the AUCG/AUCI ratio was noted between hypertensive patients with normal glucose tolerance and controls.
• Insulin resistance was present even in normoglycemic hypertensive individuals and exacerbated with worsening glucose metabolism.

Conclusions:

• Insulin resistance is a significant factor in the development of impaired glucose tolerance, both with and without hypertension.
• Hypertension contributes to insulin resistance, even in the presence of normal glucose tolerance.
• Hypertensive patients with impaired glucose tolerance or type 2 diabetes may exhibit relative insulin secretion deficiency or beta-cell dysfunction.