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- W4230239462 abstract "Background: Recent studies have confirmed that microRNA-223 may participate in high-on clopidogrel treatment platelet reactivity. Clopidogrel requires hepatic enzyme metabolic activation to produce its metabolite with pharmacological activity, as a result, there are few researches about platelet reactivity. The aim of the current study is to explore the possible regulatory mechanism between microRNA-223 and platelet reactivity after clopidogrel treatment. Methods: In this study, we established an experimental model of MEG-01 cells treated with clopidogrel and human liver microsomes incubation system, so that the effects of clopidogrel active metabolites on megakaryocytes and platelets can be simulated. The relation of microRNA-223, C/EBP α and P2Y12 was further investigated by both cell experiments and clinical studies. Results: The ratio of platelet P2Y12 expression before and after treatment was significantly higher in Low Responders group (1.14604 vs 0.77097, p=0.031). After treatment at 200 ul/2 ml for 3 and 5 consecutive days, miR-223 expression in MEG-01 cells decreased by 47.3% and 32%, respectively (p < 0.05). P2Y12 mRNA expression was 193.4% higher after 3 consecutive days (p < 0.001), and significantly lower after 5 consecutive days than that in the negative control group (p < 0.05). P2Y12 and C/EBP α protein expression were significantly lower after 5 consecutive days (p < 0.01). Conclusions: A negative feedback loop was carried out by clopidogrel active metabolite to recede its inhibition of P2Y12 signal pathway through P2Y12-PI3K/Akt-C/EBP α-miR-223 pathway, which may be excessively activated and play a role in the occurrence of high-on clopidogrel treatment platelet reactivity." @default.
- W4230239462 created "2022-05-11" @default.
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- W4230239462 date "2020-11-05" @default.
- W4230239462 modified "2023-10-18" @default.
- W4230239462 title "Regulatory mechanism of miR-223 on platelet reactivity in ischemic stroke patients after clopidogrel treatment" @default.
- W4230239462 doi "https://doi.org/10.22541/au.160456714.42524663/v1" @default.
- W4230239462 hasPublicationYear "2020" @default.
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