XU Chang-jun, WANG Peng-fei, LIU Yang, et al. Regulatory Effect of PI3K/Akt/mTOR Signal on Autophagy in Idiopathic Pulmonary Fibrosis and Intervention Effect of Astragaloside[J]. Chinese journal of experimental traditional medical formulae, 2017, 23(18): 75-82.
XU Chang-jun, WANG Peng-fei, LIU Yang, et al. Regulatory Effect of PI3K/Akt/mTOR Signal on Autophagy in Idiopathic Pulmonary Fibrosis and Intervention Effect of Astragaloside[J]. Chinese journal of experimental traditional medical formulae, 2017, 23(18): 75-82. DOI: 10.13422/j.cnki.syfjx.2017180075.
Objective: To study the regulatory effect of phosphatidylinasitol 3-kinase(PI3K)/Akt/mTOR signal on the autophagy in idiopathic pulmonary fibrosis and the intervention effect of astragaloside.Method: The c57bl/6 Mice induced by bleomycin(BLM) were given astragaloside with low (25 mg · kg-1)
medium (50 mg · kg-1) and high (100 mg · kg-1) dose by gavage. At 3
7
14
28 days
lung tissues were collected for the analysis by hematoxylin-eosin (HE)
Masson
immunohistochemical
and Western blot.Result: Astragaloside with medium dose and high dose significantly inhibited the inflammatory reaction of lung tissues
down-regulated expression of transforming growth factor-β1 (TGF-β1)
increased LC3Ⅱ/Ⅰand beclin-1 expressions
decreased p62
inhibited phosphorylation levels of PI3K
Akt and mTOR
and strengthened cell autophagy activity.Conclusion: Astragaloside stopped the epithelial mesenchymal transdifferentiation(EMT) process by inhibiting the inflammatory reaction of lung tissues and the expression of TGF-β1
strengthening the autophagy activity and inhibiting PI3K/Akt/mTOR signal.