Swimming improves platelet dysfunction in mice fed with a high-fat diet

Area of Science:

• Cardiovascular Physiology
• Hematology
• Exercise Science

Background:

• High-fat diets induce obesity, dyslipidemia, and platelet dysfunction.
• Platelet hyperactivity contributes to thrombotic complications associated with metabolic disorders.

Purpose of the Study:

• To investigate the effects of swimming exercise on platelet function in mice fed a high-fat diet.
• To elucidate the underlying mechanism involving pAKT signaling in platelets.

Main Methods:

• Mice were assigned to control, high-fat, or high-fat diet with swimming groups.
• Swimming intervention involved 60 minutes daily, 5 days/week for 8 weeks.
• Platelet function assays included bleeding time, clot retraction, aggregation, and pAKT levels.

Main Results:

• High-fat diet led to weight gain, dyslipidemia, shortened bleeding time, and increased platelet aggregation and pAKT.
• Swimming intervention reversed these effects, reducing body weight, improving lipid profiles, prolonging bleeding time, and decreasing platelet aggregation and pAKT levels.

Conclusions:

• Swimming exercise ameliorates high-fat diet-induced platelet dysfunction in mice.
• The mechanism involves the inhibition of pAKT phosphorylation in platelets, suggesting a role in regulating platelet activation.