MODIFIED DNA APTAMERS INHIBITING THROMBIN ACTIVITY Russian patent published in 2011 - IPC C12N15/115 C12N15/15 A61K31/712 

Abstract RU 2410432 C1

FIELD: chemistry; biochemistry.

SUBSTANCE: invention relates to biotechnology and medicine and specifically to direct thrombin inhibitors. The invention discloses a modified aptamer oligodeoxyribonucleotide of general formula d R-GTGACGTANGGTTGGTGTGGTTGGGGCGTCAC-R where d is deoxyribose (oligonucleotide contains deoxyribose in all positions), R denotes chemical substitutes. The substitute used is aminohexanol (NH2 group), which esterifies the phosphate group on the 5' or 3' end and PEG which is bonded on the 5' and/or 3' end. At least one of the substitutes bonded on the 5' or 3' end is polyethylene glycol (PEG). The disclosed modified DNA aptamer inhibits thrombin activity in human blood plasma by prolonging thrombin clotting time, prothrombin time and activated partial thromboplastin time and inhibits thrombin-stimulated aggregation of thrombocytes. During intravenous administration to an experimental animal, the modified DNA aptamer circulates in the blood longer than the basic aptamer RE31.

EFFECT: said DNA aptamer can serve as the base for antithrombotic medicinal agents.

6 dwg, 3 ex

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RU 2 410 432 C1

Authors

Spiridonova Vera Alekseevna

Golovin Andrej Viktorovich

Kopylov Aleksej Mikhajlovich

Dobrovol'Skij Anatolij Borisovich

Mazurov Aleksej Vladimirovich

Dates

2011-01-27Published

2009-11-23Filed