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Related Concept Videos

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Turbidimetry on Human Washed Platelets: The Effect of the Pannexin1-inhibitor Brilliant Blue FCF on Collagen-induced Aggregation
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Tomato extract inhibits human platelet aggregation in vitro without increasing basal cAMP levels.

Sheryl A Lazarus1, Manohar L Garg

  • 1Nutrition and Dietetics, University of Newcastle, Callaghan, NSW, Australia.

International Journal of Food Sciences and Nutrition
|June 30, 2004
PubMed
Summary
This summary is machine-generated.

Tomato extract significantly inhibits platelet aggregation, a key factor in cardiovascular disease. This finding suggests a potential mechanism for how tomatoes promote heart health.

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Area of Science:

  • Cardiovascular Science
  • Nutritional Science
  • Biochemistry

Background:

  • Epidemiological studies suggest a link between tomato consumption and reduced cardiovascular disease (CVD) risk.
  • The specific mechanisms underlying this protective effect remain largely unknown.
  • Platelet aggregation plays a critical role in thrombotic events contributing to CVD.

Purpose of the Study:

  • To investigate the in vitro effects of an aqueous tomato fraction (tomato extract) on human platelet aggregation.
  • To elucidate the potential biochemical pathways involved in tomato's anti-platelet activity.

Main Methods:

  • Human platelet-rich plasma was prepared and incubated with varying concentrations of tomato extract.
  • Platelet aggregation was induced using agonists such as collagen, adenosine diphosphate (ADP), and arachidonic acid.
  • Cyclic adenosine monophosphate (cAMP) levels were measured to assess potential mechanisms.

Main Results:

  • Tomato extract significantly inhibited collagen- and ADP-induced platelet aggregation (P<0.001).
  • No significant inhibition was observed for arachidonic acid-induced aggregation.
  • Inhibition was dose-dependent and increased with incubation time.
  • Tomato extract did not alter basal cAMP levels.

Conclusions:

  • Tomato extract possesses anti-platelet aggregation properties.
  • The mechanism of inhibition appears to involve the phospholipase C pathway, upstream of cyclooxygenase.
  • These findings offer a potential biochemical explanation for the cardiovascular benefits associated with tomato consumption.