The influence of coronary stenting with rapamycin-eluting stents on the number of circulating CD4+CD25high+regulatory T-cells


Aim. To investigate the effects of coronary stenting with rapamycin-eluting stents on parameters of cell immunity.
Methods. 26 patients (group 1) with stable coronary heart disease and angiographically proved coronary stenosis underwent stenting with rapamycin-eluting stents. The control group (group 2) consisted of 6 patients: 4 patients underwent diagnostic coronaroangiography, 1 patient got a bare metal stent and in 1 patient angioplasty was unsuccessful. Blood samples were obtained before and 1 month after the intervention. The quantity of activated (CD4+CD25low+) and regulatory (CD4+CD25high+) T cells was measured by direct immunofluorescence and flow cytometry. Plasma concentration of IL-10 was determined by ELISA.
Results. In group 1 the percentages of CD4+CD25high+ regulatory T-cells increased significantly one month after stenting, while in group 2 no difference in regulatory T-cell levels before and after the intervention was observed. No changes in total number of leukocytes, relative levels of lymphocytes, CD4+ T-cells, activated CD4+CD25+low T-cells and IL-10 plasma concentration before and after the procedure were detected in both groups.
Conclusion. Rapamycin-eluting stent implantation is associated with a significant increase of circulating CD4+CD25high+ regulatory T-cell level.


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Copyright (c) 2009 Aref'eva T.I., Provatorov S.I., Potekhina A.V., Sokolov V.O., Kukhtina N.B., Samko A.N., Krasnikova T.L., Arefieva T.I., Provatorov S.I., Potekhina A.V., Sokolov V.O., Kukhtina N.B., Samko A.N., Krasnikova T.L.

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