Related Experiment Videos
Human leucocyte-endothelial interactions in peripheral arterial occlusive disease
G Ciuffetti1, R Lombardini, R Paltriccia
1Department of Clinical Medicine, Pathology and Pharmacology, University of Perugia, Italy.
European Journal of Clinical Investigation
|January 1, 1994
Summary
Treadmill exercise in peripheral arterial occlusive disease (PAOD) patients reduced granulocyte expression of key adhesion molecules (Mac-1, p150,95) and caused neutropenia, indicating leucocyte-endothelial interactions during ischemia.
Area of Science:
- Immunology
- Vascular Biology
- Exercise Physiology
Background:
- Peripheral arterial occlusive disease (PAOD) involves impaired blood flow, potentially affecting immune cell behavior.
- Leukocyte adhesion molecules play a crucial role in inflammatory processes and cell trafficking.
Purpose of the Study:
- To investigate the expression of leukocyte adhesion receptors on granulocytes in PAOD patients versus healthy controls.
- To determine the effect of treadmill exercise on these adhesion molecules and white blood cell counts in PAOD.
Main Methods:
- Ex vivo analysis of granulocytes from 10 PAOD patients and 10 healthy controls.
- Measurement of CD11a/CD18 (LFA-1), CD11b/CD18 (Mac-1), and CD11c/CD18 (p150,95) expression using immunofluorescence.
- Monitoring of total and differential white blood cell counts before and after exercise.
Main Results:
- PAOD patients showed a significant reduction in granulocytes expressing CD11b/CD18 (Mac-1) and CD11c/CD18 (p150,95) post-exercise.
- A significant neutropenia was observed in PAOD patients after exercise.
- Exercise did not appear to significantly alter adhesion molecule expression in healthy controls (implied by comparison).
Conclusions:
- Exercise-induced ischemia in PAOD patients is associated with changes in granulocyte adhesion molecule expression.
- These findings suggest that leukocyte-endothelial interactions are involved in the ischemic conditions of PAOD.