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Updated: Apr 10, 2026

Experimental and Imaging Techniques for Examining Fibrin Clot Structures in Normal and Diseased States
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Impairment of Endothelial Cell Function Induced by Hemoglobin A(1c) and the Potential Mechanisms

J Bo1, Y Guan1, Y Guo1

  • 1Key Laboratory of Laboratory Medicine, Ministry of Education of China, Zhejiang Provincial Key Laboratory of Medical Genetics, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China.

Experimental and Clinical Endocrinology & Diabetes : Official Journal, German Society of Endocrinology [And] German Diabetes Association
|June 13, 2015
PubMed

Insights

High hemoglobin A1c (HbA1c) levels impair endothelial cell function, reducing nitric oxide and increasing oxidative stress. This study provides evidence linking HbA1c to diabetic cardiovascular complications.

Area of Science:

  • Endocrinology
  • Vascular Biology
  • Diabetology

Background:

  • Hemoglobin A1c (HbA1c) reflects glycemic control but its pathological role in diabetic complications is unclear.
  • Understanding HbA1c's direct impact on endothelial cells is crucial for managing diabetic vascular disease.

Purpose of the Study:

  • To investigate the direct effects of HbA1c on endothelial cell function.
  • To elucidate the underlying molecular mechanisms linking HbA1c to diabetic complications.

Main Methods:

  • Assessed human umbilical vein endothelial cell (HUVEC) viability and migration.
  • Measured nitric oxide (NO) and reactive oxygen species (ROS) production.
  • Quantified eNOS, p-AMPK, and NOX4 expression via molecular assays.

Main Results:

  • Elevated HbA1c reduced HUVEC viability and migration in a dose- and time-dependent manner.
  • HbA1c inhibited NO production while increasing ROS generation.
  • Downregulation of eNOS and p-AMPK, and upregulation of NOX4 were observed with increasing HbA1c.

Conclusions:

  • HbA1c directly impairs endothelial cell function.
  • These findings support a pathological role for HbA1c in diabetic cardiovascular complications.
Abstract

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