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Related Experiment Videos

Platelet hyperfunction in dogs with malignancies

E A McNiel1, G K Ogilvie, M J Fettman

  • 1Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523, USA.

Journal of Veterinary Internal Medicine
|May 1, 1997
PubMed
Summary

Dogs with cancer exhibit hyperaggregable platelets, showing increased aggregation responses to collagen and adenosine diphosphate (ADP). This suggests a potential link between malignancy and heightened platelet activity in canine subjects.

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Area of Science:

  • Veterinary Medicine
  • Hematology
  • Oncology

Background:

  • Platelet function can be altered in various disease states.
  • Hyperaggregable platelets are associated with thrombotic events.

Purpose of the Study:

  • To investigate in vitro platelet aggregation in dogs with malignancies.
  • To compare platelet responsiveness to specific agonists between cancer-bearing and healthy dogs.

Main Methods:

  • Whole blood samples from 59 dogs with malignancies and 24 controls were analyzed.
  • In vitro platelet aggregometry utilized collagen, arachidonic acid, and adenosine diphosphate (ADP).
  • Measured parameters included aggregation delay, slope, maximum aggregation, and adenosine triphosphate (ATP) secretion.

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Main Results:

  • Dogs with malignancies showed significantly shorter aggregation delays, higher maximum aggregation, and increased ATP secretion in response to collagen.
  • Platelets from dogs with malignancies aggregated at lower concentrations of ADP compared to controls.
  • Platelet response to arachidonic acid was generally poor across all samples.

Conclusions:

  • Findings suggest that dogs with malignancies possess hyperaggregable platelets.
  • Altered platelet function may be a consequence of malignancy in dogs.
  • Further research is warranted to explore the clinical implications of platelet hyperaggregability in canine cancer.