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Bleeding time and PAF-acether-induced platelet aggregation in atopy
A Szczeklik1, M Krzanowski, E Nizankowska
1Department of Allergy and Clinical Immunology, Copernicus Academy of Medicine, Cracow, Poland.
Agents and Actions. Supplements
|January 1, 1987
Summary
Patients with respiratory atopy exhibit altered bleeding times and platelet aggregation responses to arachidonic acid. This suggests a hemostatic imbalance in atopy, though aspirin did not impact these measures in the study.
Area of Science:
- Immunology
- Hematology
- Pulmonary Medicine
Background:
- Respiratory atopy is a condition affecting the airways.
- Platelet function plays a crucial role in hemostasis.
- Understanding hemostatic differences in atopy may reveal underlying mechanisms.
Purpose of the Study:
- To investigate hemostatic parameters in patients with respiratory atopy.
- To compare bleeding time and platelet aggregation between atopics and healthy controls.
- To assess the effect of aspirin on hemostasis in respiratory atopy.
Main Methods:
- A double-blind, cross-over study design was employed.
- Participants included 18 patients with respiratory atopy and 12 healthy controls.
- Bleeding time and platelet aggregation in response to arachidonic acid and PAF-acether were measured.
Main Results:
- Patients with respiratory atopy had significantly longer bleeding times compared to controls (p < 0.05).
- Platelet aggregation in response to arachidonic acid was reduced in atopics.
- No significant differences in platelet aggregation were observed with PAF-acether or PAF-acether/collagen stimulation.
- Aspirin (20 mg) did not alter bleeding time or platelet aggregability in either group.
Conclusions:
- Respiratory atopy is associated with a moderate hemostatic imbalance.
- The specific mechanisms underlying this imbalance require further investigation.
- Platelet response to arachidonic acid is impaired in respiratory atopy.