Chinese Journal of Tissue Engineering Research ›› 2013, Vol. 17 ›› Issue (20): 3618-3625.doi: 10.3969/j.issn.2095-4344.2013.20.002

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Expression prolife of mitogen-activated protein kinase pathway genes in vascular calcification associated with osteogenic differentiation of smooth muscle cells

Jin Bo1, Yin Heng-chong2, Wang Ling-qing1, Bao Li-wen1, Li Yan-lin1, Zhu Jun1, Shi Hai-ming1   

  1. 1 Department of Cardiology, Huashan Hospital, Fudan University, Shanghai  200040, China
    2 Department of Cardiology, Ruyang People’s Hospital, Luoyang  471200, Henan Province, China
  • Received:2012-10-18 Revised:2012-11-20 Online:2013-05-14 Published:2013-05-14
  • Contact: Shi Hai-ming, M.D., Chief physician, Professor, Doctoral supervisor, Department of Cardiology, Huashan Hospital, Fudan University, Shanghai 200040, China shihmhs@yahoo.com.cn
  • About author:Jin Bo☆, M.D., Attending physician, Department of Cardiology, Huashan Hospital, Fudan University, Shanghai 200040, China jinbo7711@yahoo.com.cn
  • Supported by:

    the National Natural Science Foundation of China, No. 81100157

Abstract:

BACKGROUND: Vascular calcification is recognized as an active and regulated biological process involving osteoblast-like cell transdifferentiation of vascular smooth muscle cells. However, the precise mechanism of vascular calcification is still unclear. 
OBJECTIVE: To explore the pathophysiological mechanism of atherosclerotic calcification in uremic mice.
METHODS: The animal model of atherosclerotic calcification in Apolipoprotein E knock-out mice was established with 5/6 nephrectomy. Histomorphological changes of aorta sections of mice were evaluted by hematoxylin-eosin staining and Von Kossa staining to confirm atherosclerotic calcification. The differentially expressed genes in mitogen-activated protein kinase pathway were evaluated using mouse whole-genome Agilent chip. Real-time quantitative reverse transcriptase-polymerase chain reaction was used to verify gene expression changes related to mitogen-activated protein kinase pathway, and combined with pathway analysis to explore the relationship between mitogen-activated protein kinase pathway and vascular calcification.
RESULTS AND CONCLUSION: The histomorphological changes of aorta sections of uremic Apolipoprotein E knock-out mice indicated atherosclerotic calcification after 12 weeks of modeling. Microarray hybridization identified fourteen differentially expressed genes in the mitogen-activated protein kinase pathway, which have significantly altered their expression levels during atherosclerotic calcification. Reverse transcriptase-polymerase chain reaction results were consistent with the chip validation. The extracellular signal-regulated kinase 1/2 signal transduction pathway played an important role in vascular calcification, identified by KEGG pathway analysis. Experimental findings indicate that, atherosclerotic calcification in Apolipoprotein E knock-out mice with 5/6 nephrectomy is closely associated with mitogen-activated protein kinase signaling pathway, which plays an important role in smooth muscle phenotypic transition.

Key words: tissue construction, bone tissue construction, atherosclerosis, vascular calcification, uremia, smooth muscle cells, mitogen activated protein kinase, gene chip, expression profile, mitogen-activated protein kinase signaling pathway, morphology, differentially expressed gene, National Natural Science Foundation of China

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