Combination of aptamer and drug for reversible anticoagulation in cardiopulmonary bypass.

Combination of aptamer and drug for reversible anticoagulation in cardiopulmonary bypass.
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DOI:
10.1038/nbt.4153
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发表时间:
2018-08
影响因子:
46.9
通讯作者:
Sullenger BA
Sullenger BA
中科院分区:
工程技术1区
文献类型:
--
作者:
Gunaratne R;Kumar S;Frederiksen JW;Stayrook S;Lohrmann JL;Perry K;Bompiani KM;Chabata CV;Thalji NK;Ho MD;Arepally G;Camire RM;Krishnaswamy S;Sullenger BA

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Unfractionated heparin (UFH), the standard anticoagulant for cardiopulmonary bypass (CPB) surgery, carries a risk of post-operative bleeding and is potentially harmful in patients with heparin-induced thrombocytopenia-associated antibodies. To improve the activity of an alternative anticoagulant, the RNA aptamer 11F7t, we solved X-ray crystal structures of the aptamer bound to factor Xa (FXa). The finding that 11F7t does not bind the catalytic site suggested it could complement small-molecule FXa inhibitors. We demonstrate that combinations of 11F7t and catalytic-site FXa inhibitors enhance anticoagulation in purified reaction mixtures and plasma. Aptamer-drug combinations prevent clot formation as effectively as UFH in human blood circulated in an extracorporeal oxygenator circuit that mimics CPB, while avoiding side effects of UFH. An antidote can promptly neutralize the anticoagulant effects of both FXa inhibitors. Our results suggest that drugs and aptamers with shared targets can be combined to exert more specific and potent effects than either agent alone.
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