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Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice
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Platelet-neutrophil conjugate formation is increased in diabetic women with cardiovascular disease

Hillary A Tuttle1, Grace Davis-Gorman, Steven Goldman

  • 1Cardiovascular and Thoracic Surgery and The Sarver Heart Center, University of Arizona Health Sciences Center, Tucson, AZ 85724, USA. tuttleh@comcast.net

Cardiovascular Diabetology
|November 12, 2003
PubMed

Insights

Diabetic women show increased platelet-neutrophil activation, a marker linked to cardiovascular disease (CVD). This heightened response in diabetic women may explain their greater risk for coronary heart disease (CHD) compared to men.

Area of Science:

  • Cardiovascular Science
  • Diabetology
  • Immunology

Background:

  • Diabetes affects over 17 million Americans, increasing coronary heart disease (CHD) risk fourfold.
  • Diabetic women face a 3.8 times higher risk of CHD than diabetic men, with underlying reasons unclear.
  • Increased platelet-neutrophil conjugates, associated with cardiovascular disease (CVD), are hypothesized to be higher in diabetic women with CVD.

Purpose of the Study:

  • To test if platelet-neutrophil conjugates are elevated in diabetic women with CVD compared to diabetic men with CVD and non-diabetic women with CVD.
  • To investigate the inflammatory response and platelet-neutrophil interactions in diabetic women with cardiovascular disease.

Main Methods:

  • Quantification of platelet-neutrophil conjugates using flow cytometry.
  • Assessment of direct binding between neutrophil PSGL-1 receptor and platelet P-selectin.
  • Stimulation of blood samples with platelet-activating factor (PAF).

Main Results:

  • Diabetic women without CVD showed increased platelet-neutrophil conjugates (63.3%) upon PAF stimulation compared to diabetic women with CVD (46.8%) and non-diabetic women with CVD (48.6%).
  • The stimulation ratio of platelet-neutrophil conjugates was significantly higher in diabetic and non-diabetic women with CVD (3.3) versus diabetic men with CVD (2.1).

Conclusions:

  • Platelets and neutrophils in diabetic women exhibit a greater activation potential than in diabetic men.
  • This enhanced activation may contribute to increased thrombosis and inflammation.
  • Findings suggest a potential mechanism for the higher severity of coronary heart disease observed in diabetic women.
Abstract

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