Plant-derived compounds normalize platelet bioenergetics and function in hyperglycemia

Area of Science:

• Biochemistry
• Cardiovascular Research
• Metabolic Health

Background:

• Polyphenols are known to reduce oxidative stress and influence glycemic control.
• The impact of polyphenols on platelet bioenergetics and clot structure in diabetes and hyperglycemia remains unclear.

Purpose of the Study:

• To investigate how polyphenols affect human platelet bioenergetics.
• To determine the subsequent impact on clot structure under normoglycemic versus acute hyperglycemic conditions in vitro.

Main Methods:

• Isolated human platelets were exposed to normoglycemic (5 mM glucose) or hyperglycemic (25 mM glucose) conditions.
• Platelets were treated with four polyphenols (resveratrol, hesperetin, EGCG, quercetin) to assess effects on ROS, mitochondrial function, and procoagulant activity.
• Clot structure was analyzed using confocal microscopy for fibrin density and porosity.

Main Results:

• Acute hyperglycemia elevated platelet reactive oxygen species (ROS), mitochondrial calcium flux, and procoagulant platelet numbers.
• Resveratrol, quercetin, and EGCG decreased platelet ROS.
• Resveratrol and EGCG reduced mitochondrial calcium flux in hyperglycemia; resveratrol also decreased procoagulant platelets and attenuated oxygen consumption.

Conclusions:

• Polyphenols can mitigate the heightened platelet activity associated with hyperglycemia.
• These findings suggest potential therapeutic applications for polyphenols in thrombosis prevention strategies for diabetic patients.