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Tác Dụng Bảo Vệ Của Morphine Chống Lại Tổn Thương Do Oxy Hóa Trong Các Tế Bào H9c2
Tóm tắt
Có một số chỉ dẫn cho thấy morphine có thể tác động bảo vệ cơ tim dưới một số điều kiện nhất định. Mục tiêu của nghiên cứu này là điều tra tác động của morphine lên sự sống sót và trạng thái oxy hóa của các tế bào H9c2 (tế bào cơ tim chuột) chịu ảnh hưởng của stress oxy hóa do tiếp xúc với tert-butyl hydroperoxide (t-BHP). Các thí nghiệm của chúng tôi cho thấy việc điều trị trước bằng morphine trước khi thêm t-BHP đã làm cải thiện đáng kể tính sống sót của tế bào. Morphine có khả năng tăng cường khả năng chống oxy hóa tổng cộng của các tế bào H9c2 và giảm sản xuất các gốc tự do oxy, carbonyl hóa protein, và peroxy hóa lipid. Tổn thương tế bào do t-BHP gây ra liên quan đến mức độ phosphoryl hóa thấp của p38 MAPK và GSK-3β. Việc điều trị trước bằng morphine đã làm tăng phosphoryl hóa p38, và tỷ lệ phospho-p38/p38 tăng lên được duy trì ngay cả khi có sự hiện diện của t-BHP. Morphine không thay đổi mức độ phosphoryl hóa GSK-3β, nhưng thú vị thay, tỷ lệ phospho-GSK-3β/GSK-3β đã tăng lên đáng kể sau khi ủ tiếp theo với t-BHP. Hơn nữa, việc tiếp xúc với morphine đã dẫn đến sự tăng cường của enzyme chống oxy hóa catalase. Tác dụng bảo vệ của morphine đã bị loại bỏ khi thêm vào các chất ức chế PI3K wortmannin và/hoặc ức chế MAPK p38 SB203580. Có thể kết luận rằng morphine có thể bảo vệ các tế bào H9c2 chống lại stress oxy hóa và rằng sự bảo vệ này ít nhất được trung gian một phần qua việc kích hoạt các con đường p38 MAPK và PI3K/GSK-3β.
Từ khóa
#morphine #tế bào H9c2 #stress oxy hóa #p38 MAPK #enzyme chống oxy hóaTài liệu tham khảo
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