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- W4210555422 abstract "Introduction: Acute ischemic stroke (AIS) is the leading cause of combined morbidity and mortality worldwide. Recombinant tissue plasminogen activator (rtPA) is the only FDA-approved drug to treat AIS, however, it is limited to treating patients within 4.5 hours of stroke onset because of the risk of intracranial hemorrhage. This limits rtPA administration to ~6% of patients. Moreover, it poorly lyses large vessel occlusion (LVO) stroke. Endovascular mechanical thrombectomy (MT) effectively recanalizes LVO but is limited to highly specialized hospitals, leaving the majority without acute therapy. Hypothesis: We hypothesize that targeted von Willebrand Factor (VWF) inhibition by DTRI-031 will recanalize arterial thrombosis in a canine model of LVO stroke, and DTRI-031 activity will be rapidly reversed by DTRI-025, which is specifically designed to inhibit DTRI-031. Methods: Utilizing a canine embolic middle cerebral artery occlusion (eMCAO) model of LVO stroke, we assessed DTRI-031 on vessel recanalization after 6 hours of LVO stroke by digital subtraction angiography (DSA). We also measured the effect of recanalization on infarct volume (efficacy) and hemorrhage (safety) using magnetic resonance imaging (MRI). Finally, we assessed the ability of DTRI-025, an oligonucleotide that binds DTRI-031 to reverse DTRI-031 activity. Results: DTRI-031 administration after 6 hours of LVO stroke resulted in ≥TICI 2A in 62.5% and ≥TICI 2B in 50% of canines (n=8). The negative control group demonstrated no revascularization (n=7). Recanalization resulted in reduced infarct volume compared to the negative control (p<0.05, unpaired t-test). None of the animals that received DTRI-031 had an intracranial hemorrhage on MRI. Finally, DTRI-025 completely reversed the activity of DTRI-031 within 5 minutes of administration in both whole blood impedance aggregometry (WBA) and PFA-100. There was no difference in heart rate, blood pressure, or temperature among the 3 groups studied. Conclusion: DTRI-031 effectively recanalizes LVO after 6 hours of stroke onset with reduced infarct volume and no incidence of hemorrhage. DTRI-025 rapidly reverses DTRI-031. This drug/reversal agent combination represents a robust yet safe approach to treat AIS." @default.
- W4210555422 created "2022-02-08" @default.
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- W4210555422 date "2022-02-01" @default.
- W4210555422 modified "2023-09-27" @default.
- W4210555422 title "Abstract 45: Vwf Inhibitor Lyses Middle Cerebral Artery Occlusion After 6 Hours Of Large Vessel Occlusion Stroke" @default.
- W4210555422 doi "https://doi.org/10.1161/str.53.suppl_1.45" @default.
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