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      Serum Levels of Circulating Adhesion Molecules after Coronary Angioplasty


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          The activation of platelets, leukocytes, and vascular endothelial cells mediated by cell adhesion molecules may play a role in the mechanism of restenosis, which is still a significant complication after coronary angioplasty. We observed serial changes in the circulating soluble forms of adhesion molecules in 25 patients with coronary artery disease who underwent coronary angioplasty for a single lesion of the left anterior descending artery. Serum levels of sICAM-1 (p < 0.05) and sP-selectin (p < 0.05) were significantly increased immediately after angioplasty in the coronary sinus blood samples. These increases continued during the 48-hour observation period, and the maximum increase was seen 48 h after angioplasty for sICAM-1 (p < 0.01) and 24 h after angioplasty for sP-selectin (p < 0.01). The level of sL-selectin increased 24 h (p < 0.01) and 48 h (p < 0.001) after angioplasty. These changes were not observed in the peripheral blood samples. The sE-selectin level did not change after angioplasty. A multiple regression analysis showed that the late loss index obtained from quantitative angiographic (QCA) analysis was correlated with the changes in sICAM-1 (r = 0.31, p < 0.05), sL-selectin (r = 0.28, p < 0.05), and sP-selectin (r = 0.26, p < 0.05) 48 h after angioplasty in the coronary sinus blood samples, but was not correlated with procedural variables, other QCA variables, or the change in the sL-selectin level. The measurements of these adhesion molecule levels may help to evaluate traumatic vessel wall injury and inflammation at the intervention site after coronary angioplasty.

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          The biology of platelet-derived growth factor.

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            ELISA for quantitation of L-selectin shed from leukocytes in vivo.

            L-selectin is a cell surface receptor on granulocytes, lymphocytes and monocytes that is responsible for the initial attachment of leukocytes to endothelium. The extracellular domain of L-selectin is proteolytically shed from leukocytes following cellular activation in vitro. The shed form of L-selectin (SL-selectin) is functionally active and at high concentrations can inhibit leukocyte attachment to endothelium. Therefore, an ELISA was developed to quantitate the levels of SL-selectin in biological fluids, biopsy specimens and during recombinant protein production. This simple, quantitative sandwich ELISA uses two monoclonal antibodies directed against the extracellular domain of SL-selectin. The assay has a detection range of 5-1300 ng/ml, is precise and sensitive. The ability of this assay to detect SL-selectin in serum, plasma, and culture supernatant fluid was demonstrated and it was used to quantitate circulating SL-selectin in normal and patient sera. Patients with sepsis and HIV infection showed markedly elevated SL-selectin levels in serum. Thus, the ELISA should prove useful both for laboratory purposes as well as in the diagnostic evaluation of patients with inflammatory diseases.

              Author and article information

              S. Karger AG
              October 1999
              25 October 1999
              : 91
              : 4
              : 236-242
              Department of Cardiology, Koshigaya Hospital, Dokkyo University School of Medicine, Saitama, Japan
              6917 Cardiology 1999;91:236–242
              © 1999 S. Karger AG, Basel

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              Page count
              Figures: 2, Tables: 4, References: 33, Pages: 7
              Cardiac Catheterization and Interventional Cardiology


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