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Endothelial dysfunction in type 2 diabetes mellitus.

Angelo Avogaro¹, Gian Paolo Fadini, Alessandra Gallo

¹Department of Clinical and Experimental Medicine, Division of Metabolic Diseases, University of Padova, School of Medicine, Via Giustiniani 2, 35128 Padova, Italy. angelo.avogaro@unipd.it

Nutrition, Metabolism, and Cardiovascular Diseases : NMCD

|March 15, 2006

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Diabetes mellitus causes endothelial dysfunction by increasing NADPH oxidase and protein kinase C activity. This dysfunction, characterized by reduced endothelial progenitor cells, is reversible with metabolic control.

Area of Science:

Cardiovascular Research
Endocrinology
Molecular Biology

Background:

Vascular endothelial cells are crucial for cardiovascular homeostasis.
Diabetes mellitus (DM) impairs endothelial function, initiating cardiovascular disease.
Endothelial dysfunction is a key early manifestation of diabetic cardiovascular complications.

Purpose of the Study:

To elucidate mechanisms underlying endothelial dysfunction in diabetes mellitus.
To investigate the role of NADPH oxidase and protein kinase C in diabetic endothelial dysfunction.
To assess changes in endothelial progenitor cells in diabetic patients.

Main Methods:

Analysis of NADPH oxidase gene expression in circulating lymphomonocytes from DM patients.
Measurement of protein kinase C (PKC) beta 2 activity in monocytes.

Related Experiment Videos

Quantification of circulating endothelial progenitor cells.

Main Results:

Increased NADPH oxidase gene expression in DM lymphomonocytes, dependent on metabolic control.
Elevated membrane-associated PKC beta 2 activity in DM monocytes, reversible under euglycemia.
Significant reduction in circulating endothelial progenitor cells in DM patients.

Conclusions:

Diabetic endothelial dysfunction, an early atherosclerotic step, is potentially reversible.
Controlling hyperglycemia and other cardiovascular risk factors is crucial.
Intervention can prevent severe diabetic complications and premature mortality.