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ERK and Akt signaling pathways are involved in advanced glycation end product-induced autophagy in rat vascular smooth muscle cells

  • Authors:
    • Pengfei Hu
    • Dongwu Lai
    • Peilin Lu
    • Jing Gao
    • Hong He

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  • Published online on: January 23, 2012     https://doi.org/10.3892/ijmm.2012.891
  • Pages: 613-618
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Abstract

Advanced glycation end products (AGEs) play an important role in the proliferation of vascular smooth muscle cells (VSMCs) and accelerate atherosclerosis in diabetic patients. Autophagy, a life-sustaining process, is stimulated in atherosclerotic plaques by oxidized lipids, inflammation and metabolic stress conditions. In our studies, we utilized MTT assays to show that autophagy is involved in AGE-induced proliferation of VSMCs. Furthermore, treatment with AGEs (100 µg/ml) could induce autophagy in a time- and dose-dependent manner in rat aortic VSMCs. These results were further substantiated by electron microscopy and immunofluorescence imaging. Treatment with AGEs activated ERK, JNK and p38/MAPK, but inhibited Akt. Pretreatment with an ERK inhibitor and an Akt activator inhibited AGE-induced autophagy, demonstrating that AGEs induce autophagy in VSMCs through the ERK and Akt signaling pathways. In addition, RNA interference of RAGE decreased autophagy, indicating that RAGE is pivotal in the process of AGE-induced autophagy. Therefore, AGE-induced autophagy contributes to the process of AGE-induced proliferation of VSMCs, which is related to atherosclerosis in diabetes.
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Journal Cover

April 2012
Volume 29 Issue 4

Print ISSN: 1107-3756
Online ISSN:1791-244X

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  • Journal Metrics
  • Impact Factor: 5.7
  • Ranked Medicine Research and Experimental
    (total number of cites)
  • CiteScore: 12.3
  • CiteScore Rank: Q1: #28/347 Biochemistry, Genetics and Molecular Biology
  • Source Normalized Impact per Paper (SNIP): 1.022
  • SCImago Journal Rank (SJR): 1.167
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Spandidos Publications style
Hu P, Lai D, Lu P, Gao J and He H: ERK and Akt signaling pathways are involved in advanced glycation end product-induced autophagy in rat vascular smooth muscle cells. Int J Mol Med 29: 613-618, 2012.
APA
Hu, P., Lai, D., Lu, P., Gao, J., & He, H. (2012). ERK and Akt signaling pathways are involved in advanced glycation end product-induced autophagy in rat vascular smooth muscle cells. International Journal of Molecular Medicine, 29, 613-618. https://doi.org/10.3892/ijmm.2012.891
MLA
Hu, P., Lai, D., Lu, P., Gao, J., He, H."ERK and Akt signaling pathways are involved in advanced glycation end product-induced autophagy in rat vascular smooth muscle cells". International Journal of Molecular Medicine 29.4 (2012): 613-618.
Chicago
Hu, P., Lai, D., Lu, P., Gao, J., He, H."ERK and Akt signaling pathways are involved in advanced glycation end product-induced autophagy in rat vascular smooth muscle cells". International Journal of Molecular Medicine 29, no. 4 (2012): 613-618. https://doi.org/10.3892/ijmm.2012.891