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Increased serum concentrations of adhesion molecules after coronary angioplasty
Insights
Percutaneous transluminal coronary angioplasty (PTCA) increases specific adhesion molecules in the blood. This suggests cytokines play a role in blood cell interactions with the vessel wall after PTCA, potentially impacting restenosis.
Area of Science:
- Cardiovascular Biology
- Immunology
- Biochemistry
Background:
- Reocclusion remains a significant complication following percutaneous transluminal coronary angioplasty (PTCA).
- Coronary artery injury during PTCA contributes to abrupt closure and late restenosis.
- Cytokines are known to mediate blood cell-endothelium interactions, influencing vascular responses.
Purpose of the Study:
- To investigate the role of specific cytokines and adhesion molecules in blood cell-endothelium interactions post-PTCA.
- To monitor serum concentrations of soluble endothelial leukocyte adhesion molecule 1 (sELAM-1), leucocyte endothelial cell adhesion molecule 1 (sL-selectin), intercellular adhesion molecule 1 (sICAM-1), interleukin 2 receptor (sIL-2R), and interleukin 8 (IL-8) after PTCA.
Main Methods:
- Enzyme-linked immunosorbent assay (ELISA) was used to measure serum concentrations of specified molecules.
- 30 patients undergoing elective PTCA and 15 control patients undergoing coronary angiography without PTCA were studied.
- Serum samples were collected and analyzed at various time points post-procedure.
Main Results:
- Successful PTCA led to significant increases in serum concentrations of sELAM-1, sL-selectin, and IL-8 within 72 hours.
- A positive correlation was observed between the number of dilatations during PTCA and the rise in these measured parameters.
- No significant changes in sICAM-1 or sIL-2R levels were detected post-PTCA, nor were any changes observed in the control group.
Conclusions:
- PTCA induces a significant elevation in serum levels of certain adhesion molecules, including sELAM-1, sL-selectin, and IL-8.
- These findings provide preliminary evidence for the involvement of cytokines in blood cell-endothelium interactions following PTCA.
- The observed changes may contribute to the understanding of restenosis pathophysiology after coronary angioplasty.
Abstract:
1. Reocclusion is still a significant complication after percutaneous transluminal coronary angioplasty. The injury of coronary arteries resulting from PTCA plays an important role in the pathophysiology of both abrupt closure and late restenosis after an initially successful procedure. Cytokines play a pivotal role in the accumulation of circulating blood cells at the endothelium and are known to regulate their interaction with the vessel wall. 2. To obtain further information about this interaction, serum concentrations of soluble endothelial leukocyte adhesion molecule 1 (sELAM-1), leucocyte endothelial cell adhesion molecule 1 (sL-selectin), intercellular adhesion molecule 1 (sICAM-1), interleukin 2 receptor (sIL-2R) and interleukin 8 (IL-8) detected by enzyme-linked immunosorbent assay were monitored in 30 consecutive patients referred for elective PTCA. Fifteen patients who underwent elective coronary angiography without PTCA served as controls. 3. All patients underwent successful first PTCA. Within 24 h the serum concentrations of sELAM-1 increased gradually from 21.7 (SD 7.1) to 48.2 (SD 8.6) ng/ml (P < 0.01); levels of sL-selectin rose from 982.1 (SD 128.7) to 1541.3 (SD 104.6) ng/ml after 48 h (P < 0.01). Serum levels of IL-8 remained stable initially, but peaked at the end of the observation time of 72 h (9.4, SD 3.8, versus 16.1, SD 4.9 ng/ml; P < 0.05). A positive correlation was found between the number of dilatations and the rise in these parameters (P < 0.01). No significant changes were found in the serum concentrations of sICAM-1 and sIL-2R after PTCA or in any of the parameters in patients after coronary angiography. 4. We conclude that PTCA induces a significant rise in the concentration of certain adhesion molecules in serum. Thus, we provide preliminary data on the potential role of cytokines for blood cell-endothelium interaction after PTCA.(ABSTRACT TRUNCATED AT 250 WORDS)