Kaempferol gây ra quá trình apoptosis trong các tế bào u nguyên bào thần kinh đệm qua stress oxy hóa

Molecular Cancer Therapeutics - Tập 6 Số 9 - Trang 2544-2553 - 2007
Vivek Sharma1, Christy Joseph1, Soumya Ghosh1, Anindita Agarwal1, Manoj K. Mishra1, Ellora Sen1
1National Brain Research Centre, Manesar, Haryana, India

Tóm tắt

Tóm tắt Mặc dù đã có những tiến bộ gần đây trong việc hiểu rõ cơ chế phân tử liên quan đến tiến triển của u nguyên bào thần kinh đệm, tiên lượng của khối u não ác tính nhất này vẫn tiếp tục ảm đạm. Vì flavonoid kaempferol được biết đến với khả năng ức chế sự phát triển của một số bệnh ung thư ở người, chúng tôi đã nghiên cứu tác động của kaempferol lên các tế bào u nguyên bào thần kinh đệm ở người. Kaempferol đã gây ra quá trình apoptosis trong các tế bào glioma bằng cách nâng cao stress oxy hóa nội bào. Stress oxy hóa gia tăng được đặc trưng bởi sự sản sinh gia tăng của các loại oxy phản ứng (ROS) đi kèm với sự giảm các chất gạt oxy hóa như superoxide dismutase (SOD-1) và thioredoxin (TRX-1). Việc giảm biểu hiện của SOD-1 và TRX-1 nhờ RNA can thiệp ngắn (siRNA) làm tăng sinh ROS và độ nhạy cảm của các tế bào glioma với quá trình apoptosis do kaempferol gây ra. Dấu hiệu của apoptosis bao gồm giảm biểu hiện của Bcl-2 và thay đổi điện thế màng ty thể với sự gia tăng của caspase-3 hoạt động và biểu hiện của poly(ADP-ribose) polymerase đã bị phân cắt. Sự thay đổi cả điện thế màng plasma và độ linh động màng trong các tế bào được xử lý với kaempferol. Kaempferol ức chế biểu hiện của cytokine tiền viêm interleukin-6 và chemokine interleukin-8, protein chemotactic đơn bào-1, và quy định về hoạt hóa, T-cell bình thường có biểu hiện và tiết ra. Kaempferol ức chế sự di cư của tế bào glioma theo cách phụ thuộc vào ROS. Đáng chú ý, kaempferol tăng cường tác dụng độc của chất hóa trị liệu doxorubicin bằng cách tăng cường độc tính của ROS và giảm sự xuất hiện của doxorubicin. Vì tác dụng độc của cả kaempferol và doxorubicin đều được tăng cường khi sử dụng kết hợp, nghiên cứu này đưa ra khả năng trị liệu kết hợp có cơ sở là tăng cường sự rối loạn redox làm chiến lược tiêu diệt các tế bào glioma. [Mol Cancer Ther 2007;6(9):2544–53]

Từ khóa

#Glioblastoma #Apoptosis #Oxidative Stress #Flavonoid Kaempferol #ROS #SOD-1 #TRX-1 #Cytokine #Chemokine #Doxorubicin

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