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Drug-eluting coronary stents mediate inflammation-associated protein signature in an experimental in vitro study #MMPMID40784278
Paar V; Feng X; Kopp K; Marmullaku F; Hoppe UC; Motloch LJ; Lichtenauer M
Exp Mol Pathol 2025[Aug]; 143 (ä): 104991 PMID40784278show ga
Drug eluting stents (DES) are a first-line treatment for ischemic heart diseases. Due to their direct contact with the blood stream, late stent thromboses are a common complication. Thrombosis and inflammation are tightly linked to each other, and are characterized by the activation of inflammatory cells and the secretion of cytokines and chemokines. To date, the influence of DES on the activation of the inflammatory cascade and its corresponding players has not yet been investigated. We performed an in vitro study to observe any potential response of isolated human peripheral blood mononuclear cells (PBMCs) to the structure and drug-coating of different DES. PBMCs from healthy volunteers were incubated with different DES types for 48 h. We measured the secretion of cytokines and chemokines, as well as cell adhesion molecules, and selected growth factors by ELISA. DES were found to significantly increase the cytokine and chemokine secretion of IL-1beta, IL-6, IL-8, and ICAM-1, as well as the growth factors ANG and FGF-basic. We further showed that zotarolimus presents with the lowest inflammation-associated protein expression. Our data further revealed that the inflammatory reaction is highly dependent on the DES size, material, and the polymer type of the DES coating. Finally, we tendentially showed that thinner alloys are associated with a lower inflammatory reaction. Our results indicate that DES may potentially lead to an increased inflammatory reaction, considering the different DES designs and properties. This would potentially help to further improve composition and drug selection.