Tumor Biology

, Volume 36, Issue 12, pp 9769–9777 | Cite as

RETRACTED ARTICLE: Astrocyte-elevated gene-1 mediates insulin-like growth factor 1-induced the progression of cardiac myxoma

  • Changcun Fang
  • Yuwen Shen
  • Peng Qi
  • Zhengqin Liu
  • Min Zhang
  • Xinyan Pang
Research Article

Abstract

Recently, astrocyte-elevated gene-1 (AEG-1) and insulin-like growth factor 1 (IGF-1) have been involved in the regulation of multiple signaling pathways in tumorigenesis. To date, the detailed mechanisms underlying IGF-1-AEG-1 pathway-induced proliferation and apoptosis in cardiac myxoma (CM) was not reported. In the present study, we used immnohistochemistry, immunoblotting, and qRT-PCR to detect the expression profile of IGF-1 and AEG-1 in 90 CM tissues, and then cultured CM cells were subjected to si-AEG-1, in vitro, and in vivo assays. Our findings showed that IGF-1 and AEG-1 were obviously upregulated in CM tissues and markedly associated with tumor size. When CM cells were treated with si-AEG-1, si-AEG-1 attenuated IGF-1-induced CM cell growth and enhanced cell apoptosis. Mechanically, we validated the expression of AEG-1, p-Erk1/2, and p-Akt increased in CM cells in response to IGF-1 treatment in a time-dependent manner. However, si-AEG-1 affected the expression of these proteins. Functionally, we found the knockdown of AEG-1-inhibited G1/S transition and tumor formation of CM cells. In conclusion, AEG-1 regulates IGF-1-induced proliferation and apoptosis via Erk1/2 and Akt signaling in CM development, which suggests IGF-1-AEG-1 signaling could be recommended to be a useful target to exert anti-tumor effects on CM.

Keywords

IGF-1 AEG-1 Proliferation Apoptosis Cardiac myxoma 

Notes

Acknowledgments

The authors greatly thank other members of their lab for the valuable suggestions and writing.

Conflicts of interest

None

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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2015

Authors and Affiliations

  • Changcun Fang
    • 1
  • Yuwen Shen
    • 1
  • Peng Qi
    • 1
  • Zhengqin Liu
    • 1
  • Min Zhang
    • 1
  • Xinyan Pang
    • 1
  1. 1.Department of CardiosurgeryQilu Hospital of Shandong UniversityJinanChina

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