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• W3118223558 abstract "Abstract Background : Angong Niuhuang Pill (ANP) is one of the most famous drugs to treat stroke in China, but there is no definite treatment period in drug instruction. In this study, we used middle cerebral artery occlusion (MCAO) model to evaluate its therapeutic effects of different treatment periods and studied its toxic effect in rats. Methods : Protective effect of ANP was observed in the cerebral ischemia-reperfusion model in rats; ANP (270 mg/kg) three different treatment period included 1 day, 4 days and 7 days. The observation period was 30 days. Therapeutic effect was evaluated by detecting neurological function, cerebral infraction volume, brain histology and cytokines. Three dose including 550, 1640, 4910 mg/kg were studied in toxicology study. The administration period was 30 days. Toxic effect was evaluated by detecting appearance, behavior, excrement character, food-intake, body weight, hematological parameters and biomarkers such as TBA, GSTα, Cystatin C, clusterin, GSH, S-100B and MBP. Results : Seven days treatment period of ANP had better effect than 1 day and 4 days treatment periods in rat MCAO model from neurological function scores, the volume of cerebral infarction, brain histology and the serum content of IL-1β, TNF-α and NO; the brain content of IL-1β and NO. The results of 30 days multiple dose toxicology study showed no animal death in all groups; in ANP 4910 mg/kg group, the kidney and liver coefficient increased about 10%, the body weight grew more slowly, the TBA increased slightly. There was no abnormal change in histology. These all recovered after drug withdraw for 8 weeks. Conclusion: Seven days treatment period of ANP had more protective effect than 1 day and 4 days treatment periods in ischemic stroke rat. No observed adverse effect level (NOAEL) of ANP was 1640 mg/kg; the safety margin of ANP was 270-1640 mg/kg. These data provided reference to modify drug instruction." @default.
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• W3118223558 date "2020-03-16" @default.
• W3118223558 modified "2023-10-18" @default.
• W3118223558 title "Therapeutic effects of different treatment periods against ischemic stroke and toxicology study of Angong Niuhuang Pill in rats" @default.
• W3118223558 doi "https://doi.org/10.21203/rs.2.21991/v2" @default.
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